Òåñò: Test #2
Ñïèñîê âîïðîñîâ
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1. 1. What is the current? |
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| 1) d) ability of material to resist flow of charged particles | |
| 2) c) unit for measuring | |
| 3) b) the material that conducts the current | |
| 4) a) flow of charged particles | |
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2. 2. What is the voltage? |
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| 1) d) unit for measuring | |
| 2) c) electric potential difference between two points | |
| 3) b) ability of material to resist flow of charged particles | |
| 4) a) flow of charged particles | |
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3. 3. What is the resistance? |
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| 1) d) unit for measuring | |
| 2) c) flow of charged particles | |
| 3) b) electric potential difference between two points | |
| 4) a) ability of material to resist flow of charged particles | |
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4. 4. Wire stripper is used to ….? |
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| 1) d) connect the cables | |
| 2) c) cut the cables | |
| 3) b) crimp the cable lug | |
| 4) a) remove the insulation of cables | |
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5. 5. How to connect ammeter to the circuit? |
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| 1) c) all options | |
| 2) b) series | |
| 3) a) parallel | |
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6. 6. How to connect voltmeter to the circuit? |
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| 1) c) all options | |
| 2) b) series | |
| 3) a) parallel | |
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7. 7. The conductor is a material which …? |
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| 1) d) insulate the cable | |
| 2) c) used for protection | |
| 3) b) carry the current | |
| 4) a) does not conduct current | |
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8. 8. What is the insulator? |
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| 1) d) a material that improve flow of electrical current | |
| 2) c) a material which offers a very high resistance to the flow of current | |
| 3) b) a material that offers a low resistance to the flow of electrical current | |
| 4) a) a material which allows current to flow but offer the property of producing heat energy | |
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9. 9. The size of cable is measured in …? |
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| 1) d) mm² | |
| 2) c) cm² | |
| 3) b) m | |
| 4) a) km² | |
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10. 10. IEC single phase AC power circuit wiring colour codes |
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| 1) d) L-brown, N-blue, PE-green-yellow | |
| 2) c) L-brown, N-red, PE-green-yellow | |
| 3) b) L-grey, N-black, PE-green-yellow | |
| 4) a) L-brown, N-blue, PE-red | |
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11. 11. Stranded conductor sizes from 4.0 to 25 mm2 contain … strands. |
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| 1) d) 8 | |
| 2) c) 7 | |
| 3) b) 6 | |
| 4) a) 5 | |
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12. 12. Construction of high-voltage overhead cables: |
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| 1) d) steel core, conductor, insulation | |
| 2) c) conductor, armour, insulation | |
| 3) b) steel core, conductor | |
| 4) a) conductor, insulation | |
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13. 13. What is the current-carrying capacity of cable? |
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| 1) d) the maximum current consumed by the device when it is first turned on | |
| 2) c) the maximum current which can be carried by a conductor | |
| 3) b) the minimum current which can be carried by a conductor | |
| 4) a) the magnitude of current to be carried in normal service | |
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14. 14. What is the design current? |
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| 1) d) the minimum current which can be carried by a conductor | |
| 2) c) the maximum current consumed by the device when it is first turned on | |
| 3) b) the maximum current which can be carried by a conductor | |
| 4) a) the magnitude of current to be carried in normal service | |
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15. 15. Tungsten is used in …? |
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| 1) c) busbar | |
| 2) d) MCB | |
| 3) a) fuse | |
| 4) b) filament lamp | |
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16. 16. The crimping tool is used … ? |
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| 1) d) To isolate the circuit | |
| 2) c) To cut the cables | |
| 3) a) To remove the insulation from cables | |
| 4) b) for connecting wires to each other or to the contacts of connectors. | |
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17. 17. The insulation is required to … |
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| 1) c) both options | |
| 2) b) prevent users of the circuit | |
| 3) a) prevent the conductors touching together | |
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18. 18. Most used types of conductors? |
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| 1) d) wood and plastic | |
| 2) c) brass and tungsten | |
| 3) b) aluminium and silver | |
| 4) a) cooper and aluminium | |
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19. 19. ….. has a higher conductivity than …… |
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| 1) d) glass ….. wood | |
| 2) b) aluminium ….. copper | |
| 3) c) brass ….. gold | |
| 4) a) copper ….. aluminium | |
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20. 20. PVC cable withstands temperatures …. |
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| 1) d) from 0° to 65° | |
| 2) c) from 0° to 100° | |
| 3) b) from -10° to 45° | |
| 4) a) from 0° to 80° | |
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21. 21. Galvanized steel wire armour provides …? |
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| 1) d) mechanical protection | |
| 2) b) flexibility | |
| 3) c) isolation | |
| 4) a) better conductivity | |
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22. 22. MI cable colour code for general electrical wiring? |
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| 1) d) Blue | |
| 2) c) White | |
| 3) a) Red | |
| 4) b) Orange | |
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23. 23. MI cable colour code for for emergency lighting? |
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| 1) c) Blue | |
| 2) d) White | |
| 3) b) Orange | |
| 4) a) Red | |
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24. 24. MI cable colour code for fire alarm wiring? |
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| 1) d) Blue | |
| 2) c) White | |
| 3) b) Orange | |
| 4) a) Red | |
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25. 25. What is the resistor? |
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| 1) d) element which protect the circuit | |
| 2) c) element that used to increase current flow | |
| 3) b) element that used to reduce current flow | |
| 4) a) element which increases the voltage level | |
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26. 26. IEC three phase AC power circuit wiring colour codes |
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| 1) d) L1-brown, L2-black, L3-grey, N-grey, PE-black | |
| 2) c) L1-brown, L2-black, L3-red, N-grey, PE-green-yellow | |
| 3) b) L1-grey, L2-red, L3-blue, N-black, PE-green-yellow | |
| 4) a) L1-brown, L2-black, L3-grey, N-blue, PE-green-yellow | |
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27. 27. What is the size of cable which is used in general lighting system? |
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| 1) d) 4 mm² | |
| 2) c) 1.5 mm² | |
| 3) b) 6 mm² | |
| 4) a) 2.5 mm² | |
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28. 28. What is the size of cable which is used for domestic sockets? |
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| 1) d) 6 mm² | |
| 2) c) 4 mm² | |
| 3) b) 1.5 mm² | |
| 4) a) 2.5 mm² | |
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29. 29. Specify the group of semiconductors. |
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| 1) d) glass, germanium | |
| 2) c) germanium, arsenic | |
| 3) b) glass, wood, plastic | |
| 4) a) water, mercury, titanium | |
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30. 30. Resistive conductors are used in ...? |
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| 1) d) kettle elements, light sources | |
| 2) c) electrical drives | |
| 3) b) air conditioner, light sources | |
| 4) a) tubular heaters, kettle elements, irons | |
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31. 31. Maximum operating temperature of XLPE cable? |
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| 1) d) 90° | |
| 2) c) 60° | |
| 3) b) 80° | |
| 4) a) 70° | |
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32. 32. What do we mean when we refer to the switch as a “double pole” type ? |
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| 1) d) it breaks both live and neutral conductor | |
| 2) c) it breaks neutral conductor | |
| 3) b) it breaks earthing conductor | |
| 4) a) it breaks live conductor | |
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33. 33. What is the DIN-rail? |
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| 1) d) It’s a rail that holds JB | |
| 2) c) It’s a rail that holds cables | |
| 3) b) It’s a rail that holds busbar | |
| 4) a) It’s a rail that holds protection device | |
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34. 34. The main property of RCD? |
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| 1) d) protect from electrocution | |
| 2) c) protect from overload and short circuit | |
| 3) b) protect from short circuit | |
| 4) a) protect from overload | |
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35. 35. The Busbar is a ….. |
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| 1) d) type of junction box | |
| 2) c) protection device | |
| 3) b) strip or bar of copper, brass or aluminium that conducts electricity | |
| 4) a) type of cable that conducts electricity | |
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36. 36. Circuit overload protection can be provided by …? |
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| 1) d) busbar | |
| 2) c) circuit breaker | |
| 3) b) fuse | |
| 4) a) RCD | |
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37. 37. How does the fuse work? |
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| 1) d) It is tripped in the case of electrocution | |
| 2) c) It is triggered in the case of melting of a bimetallic strip | |
| 3) b) it melts when the current is too high | |
| 4) a) It melts when the low current pass through it | |
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38. 38. Determine the type of fuse which can be used again by changing melted fuse element? |
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| 1) d) Rewireable type | |
| 2) c) Auto fuse | |
| 3) b) Ceramic cartridge type | |
| 4) a) Glass cartridge type | |
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39. 39. How to know if a ceramic fuse was blown? |
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| 1) d) resistance test | |
| 2) c) ammeter test | |
| 3) b) voltmeter test | |
| 4) a) continuity test | |
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40. 40. The fuse is there to protect what? |
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| 1) d) conductors | |
| 2) c) devices | |
| 3) b) appliances | |
| 4) a) user | |
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41. 41. How will affect 50 mA to human? |
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| 1) d) Muscular contraction | |
| 2) c) painful sensation | |
| 3) b) no harmful effects | |
| 4) a) death | |
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42. 42. In which situation RCD will not provide the protection? |
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| 1) d) Live to live | |
| 2) c) Neutral to earth | |
| 3) b) Live to earth | |
| 4) a) Live to neutral | |
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43. 43. What do we mean when we refer to the switch as a “single pole” type ? |
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| 1) d) it breaks both live and neutral conductor | |
| 2) c) it breaks neutral conductor | |
| 3) b) it breaks live conductor | |
| 4) a) it breaks earth conductor | |
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44. 44. A unit of measurement of an electricity meter that measures the consumption in your home. |
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| 1) d) kVA | |
| 2) c) kWh | |
| 3) b) kV | |
| 4) a) kA | |
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45. 45. XLPE insulation is a form of … ? |
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| 1) d) cross-linked polyethylene | |
| 2) c) mineral insulated | |
| 3) b) rubber | |
| 4) a) polyvinyl chloride | |
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46. 46. Rubber insulated cables are used in … ? |
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| 1) d) all options | |
| 2) b) overhead lines | |
| 3) c) alarm system | |
| 4) a) electric utilities | |
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47. 47. The temperature of thermosetting materials? |
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| 1) d) 90° C | |
| 2) c) 80° C | |
| 3) a) 60° C | |
| 4) b) 70° C | |
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48. 48. The temperature of thermoplastic materials? |
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| 1) d) 90° C | |
| 2) c) 80° C | |
| 3) b) 70° C | |
| 4) a) 60° C | |
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49. 49. A conductor or conductive part intended to be energized in normal use, including a neutral conductor, named as? |
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| 1) d) earthing conductor | |
| 2) c) voltage drop | |
| 3) b) live part | |
| 4) a) nominal supply | |
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50. 50. Regulation 525 states that the voltage drop between the origin of the installation and a socket-outlet shall not exceed … |
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| 1) d) 8% | |
| 2) c) 6% | |
| 3) b) 4% | |
| 4) a) 3% | |
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51. 1. Electrical wiring laid along the outer walls of buildings and structures, under sheds, as well as between buildings on supports, outside roads and streets, is called .... |
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| 1) c. close | |
| 2) d. indoor | |
| 3) b. outdoor | |
| 4) internal | |
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52. 2. The conductive core of the APPR (ÀÏÏÐ) wire is made of…. |
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| 1) d. silver | |
| 2) b. lead | |
| 3) c. aluminum | |
| 4) a. Copper | |
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53. 3. Electrical wiring laid on the surface of the walls and ceilings of living rooms, in plastic boxes and pipes, refers to .... |
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| 1) d. open | |
| 2) c. hidden | |
| 3) b. indoor | |
| 4) a. outdoor | |
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54. 4. Electrical wiring laid along the outer walls of buildings and structures, under sheds, as well as between buildings on supports of no more than 4 spans up to __ meters |
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| 1) d. 20 | |
| 2) c. 25 | |
| 3) a. 15 | |
| 4) b. 35 | |
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55. 5. Indicate the color of the insulation of the phase conductor of a three-core wire used for single-phase electrical wiring: |
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| 1) d. black | |
| 2) c. yellow green | |
| 3) blue | |
| 4) a. brown | |
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56. 6. Indicate the color of the insulation of the "zero" core of a three-core wire used for single-phase electrical wiring: |
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| 1) d. black | |
| 2) c. yellow-green | |
| 3) b. blue | |
| 4) a. brown | |
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57. 7. PPV (ÏÏÂ) wire insulation is made of…. |
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| 1) d. lead | |
| 2) c. rubber | |
| 3) b. PVC | |
| 4) a. polyethylene | |
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58. 8. Protective equipment, the insulation of which reliably withstands the operating voltage of electrical installations and with the help of which it is allowed to touch live parts that are energized, belong to ... |
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| 1) d. standby | |
| 2) c. main | |
| 3) b. additional | |
| 4) a. auxiliary; | |
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59. 9. The switch is set to .... wiring wire. |
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| 1) e. neutral | |
| 2) c. phase | |
| 3) b. grounding | |
| 4) a. null | |
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60. 10. What number indicates the phase outgoing wire? |
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| 1) d. 4 | |
| 2) c. 3 | |
| 3) b. 2 | |
| 4) a. 1 | |
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61. 11. What number indicates the zero incoming wire? |
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| 1) d. 4 | |
| 2) c. 3 | |
| 3) b. 2 | |
| 4) a. 1 | |
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62. 12. The conductive core of the PPV wire is made of .... |
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| 1) c. aluminum | |
| 2) d. rubber | |
| 3) a. Copper | |
| 4) b. lead | |
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63. 13. For the possibility of reconnecting the cores and convenient replacement of the socket or switch, the ends of the wire are cut off with a margin of about |
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| 1) d. 65-75mm | |
| 2) b. 30-40mm | |
| 3) c. 5-10mm | |
| 4) a. 10-20mm | |
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64. 14. The safest electrical wiring used in the domestic environment |
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| 1) d. with special fittings | |
| 2) c. combined | |
| 3) b. open | |
| 4) a. closed | |
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65. 15. An open structure in which wires or cables are laid |
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| 1) b. Conduit | |
| 2) c. Cable box | |
| 3) d. Pipeline | |
| 4) a. Cable tray | |
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66. 16. It is allowed to lay phase and neutral wires in separate steel pipes if the continuous load current does not exceed __. |
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| 1) d. 50 A | |
| 2) a. 150 A | |
| 3) b. 100 A | |
| 4) c. 25 A | |
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67. 17. A tube used to protect and route electrical wiring in a building or structure. |
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| 1) d. AC power plugs | |
| 2) c. Cable box | |
| 3) a. Cable tray | |
| 4) b. Conduit | |
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68. 18. Electrical wiring laid on the surface of walls, ceilings, in sealed steel pipes is called .... |
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| 1) d. striped | |
| 2) c. string | |
| 3) b. pipe | |
| 4) a. cable | |
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69. 19. The power line laid across the territory of the power plant (distribution substation) is called .... |
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| 1) d. none of the above | |
| 2) c. current conductor | |
| 3) b. outdoor wiring; | |
| 4) a. internal wiring; | |
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70. 20. What are the types of trays? |
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| 1) d. welded and from perforated strips | |
| 2) c. iron | |
| 3) b. metal and non metal | |
| 4) a. boiled and forged | |
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71. 21. How are cable cores connected? |
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| 1) c. welding | |
| 2) d. all of the above | |
| 3) b. crimping | |
| 4) a. soldering | |
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72. 22. At what temperatures can the cable be laid? |
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| 1) d. from 15 C° | |
| 2) c. from 0 C° and above | |
| 3) b. 0 C° | |
| 4) a. from -5 C° to -10 C° | |
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73. 23. What metal are cable cores made of? |
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| 1) d. aluminum and copper | |
| 2) c. aluminum | |
| 3) b. cast iron | |
| 4) a. tin | |
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74. 24. What work is carried out at the second stage of wiring installation? |
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| 1) d. performance of all connections | |
| 2) c. construction and finishing works | |
| 3) b. procurement work | |
| 4) a. preparatory work | |
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75. 25. How many current conductors can a cable have? |
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| 1) a. 1 | |
| 2) b. 2 | |
| 3) c. 3 | |
| 4) d. 1-5 | |
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76. 26. What should be the length of the flexible cable connecting the welding current source and the switching device? |
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| 1) b.20m | |
| 2) c.35m | |
| 3) À.15m | |
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77. 27.The push-button switch has a letter designation... |
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| 1) a.M | |
| 2) B.B | |
| 3) c.S | |
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78. 28. How are the grounding wires connected to the grounding conductor and grounding structures? |
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| 1) B.by the welding | |
| 2) ñ.by the measuring instruments | |
| 3) a.by the cable | |
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79. 29. The electric thermal relay protects the electric motor from... |
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| 1) b.electrical shock | |
| 2) C.heating | |
| 3) a.short circuit | |
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80. 30. Who prepares the workplace for construction and installation work? |
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| 1) b.manager | |
| 2) ñ.director | |
| 3) À.owner of electrical installations | |
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81. 31. In what color should the openly laid grounding wires be painted? |
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| 1) A.black | |
| 2) b.yellow | |
| 3) c.green | |
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82. 32. What is called working grounding? |
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| 1) C) Grounding of the point or points of the current-carrying parts of the electrical installation, performed to ensure the operation of the electrical installation (not for electrical safety purposes). | |
| 2) b) Grounding performed for electrical safety purposes. | |
| 3) a) Intentional electrical connection of any point of the network, electrical installation or equipment with a grounding device. | |
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83. 33. What color is phase A marked with? |
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| 1) b.green | |
| 2) C.brown | |
| 3) a.black | |
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84. 34. What color is the zero working N? |
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| 1) c.yellow-green | |
| 2) a.green | |
| 3) B.blue | |
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85. 35. What types of disconnectors are included in the design of modular circuit breakers? |
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| 1) c.thermomagnetic | |
| 2) A.thermomagnetic and electric | |
| 3) b.electric | |
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86. 36. What categories are electrical engineering personnel divided into? |
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| 1) d) For operational, operational-repair and repair. | |
| 2) c) For operational, administrative-technical, operational-repair and repair | |
| 3) a) operational, administrative and repair. | |
| 4) b)For administrative and technical and operational repair. | |
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87. 37. Which electrical installation is considered acceptable? |
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| 1) c.where is the tension | |
| 2) B.which is with resistance | |
| 3) a.where does the current flow | |
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88. 38. How are protective grounding conductors designated, as well as zero protective conductors in electrical installations with a voltage of up to 1 kV with a deaf-grounded neutral? |
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| 1) C.PE | |
| 2) b.SF | |
| 3) à.N | |
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89. 39. What actions are performed first of all when releasing the victim from the effects of electric current? |
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| 1) C.turn off electrical equipment | |
| 2) b.give a heart massage to the victim | |
| 3) à.call an ambulance | |
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90. 40. What, according to the Rules of electrical installations, is called an electric energy receiver (electric receiver)? |
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| 1) ñ.relay | |
| 2) b.protective device | |
| 3) À.electrical energy converter | |
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91. 41. What type of electrical wiring does the cable laid through the tray in the basement belong to? |
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| 1) c.hidden | |
| 2) b.external | |
| 3) À.internal | |
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92. 42. What should electrical installations be equipped with? |
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| 1) Ñ. safe electrical equipment and medical supplies | |
| 2) b.medical supplies | |
| 3) à.safe electrical equipment | |
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93. 43. Who instructs the team on the use of tools and devices? |
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| 1) c) Admitting | |
| 2) B) The manufacturer of the work | |
| 3) a) Responsible work manager | |
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94. 44.What voltage, according to the Rules of electrical installations, should be used to power portable lamps in rooms with increased danger and especially dangerous rooms? |
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| 1) c)Voltage not higher than 100 V | |
| 2) b)Voltage not higher than 150 V | |
| 3) A) Voltage not higher than 50 V | |
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95. 45. What is meant by consumers of electric energy? |
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| 1) C) Persons who purchase electrical energy for their own household and (or) industrial needs. | |
| 2) a) Organizations, regardless of ownership and organizational and legal forms, individual entrepreneurs. | |
| 3) b) technical devices designed for the production, conversion, transformation, transmission, distribution of electrical energy and its conversion into another type of energy. | |
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96. 46.In which case should the earthing element be replaced? |
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| 1) C) If more than 50% of its cross-section is destroyed. | |
| 2) b) If more than 20% of its cross-section is destroyed. | |
| 3) a) If 30-40% of its cross-section is destroyed. | |
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97. 47. What voltage should be used to power portable AC receivers? |
|
| 1) c) Not higher than 110 V. | |
| 2) b) Not higher than 220/127 V. | |
| 3) A) Not higher than 380/220 V. | |
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98. 48.How should emergency lighting fixtures differ from working lighting fixtures? |
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| 1) c) There are no fundamental differences. | |
| 2) B) Signs or coloring. | |
| 3) a) Color. | |
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99. 49. Which rooms are classified as high-risk rooms? |
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| 1) D) Any of the listed premises is classified as high-risk premises. | |
| 2) c) Premises characterized by the presence of high temperature, the possibility of simultaneous human contact with metal structures of buildings connected to the ground, technological devices, mechanisms, etc., on the one hand, and to metal enclosures of electrical equipment (open conductive parts), on the other. | |
| 3) b) Premises characterized by the presence of metal, earth, reinforced concrete and other conductive floors. | |
| 4) a) Rooms characterized by the presence of dampness or conductive dust. | |
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100. 50. Which rooms are called dry? |
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| 1) c) Rooms in which the relative humidity of the air does not exceed 90%. | |
| 2) b) Rooms in which the relative humidity of the air does not exceed 75%. | |
| 3) A) Rooms in which the relative humidity of the air does not exceed 60%. | |
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101. 51.What is the responsibility of the head of the organization and persons responsible for electrical equipment? |
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| 1) c) for violations that occurred due to their fault, as well as for their incorrect elimination of violations in the operation of electrical installations in the serviced territory. | |
| 2) b) For untimely and unsatisfactory maintenance of electrical installations. | |
| 3) A) for non-compliance with the requirements provided for by the Rules of technical operation of electrical installations of consumers and job descriptions. | |
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102. 1. Which of these tools are wire pliers |
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| 1) D) all of them | |
| 2) C) lineman’s pliers | |
| 3) B) needle-nose pliers | |
| 4) A) diagonals | |
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103. 2. Which of these tools is not for cutting electrical wires |
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| 1) D) screwdriver | |
| 2) C) internal cutter strippers | |
| 3) B) diagonals | |
| 4) A) pliers | |
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104. 3. What tools are used to clean the insulation |
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| 1) D) pliers | |
| 2) C) insulation cleaner | |
| 3) B) stripper | |
| 4) A) side cutter | |
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105. 4. what are the two types of safe and durable wire connection (a) |
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| 1) D) electrical tape and rope | |
| 2) C) nails and screws | |
| 3) B) tape and glue | |
| 4) A) nuts and compression sleeves | |
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106. 5. what are wire nuts? (c) |
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| 1) D) copper nuts | |
| 2) C) These are thimble connectors made of hard plastic | |
| 3) B) nuts with which to make wires | |
| 4) A) nuts are made from wires | |
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107. 6. Compression sleeves… (a) |
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| 1) D) no correct answer | |
| 2) C) provide the same permanent grip than wire nuts. | |
| 3) B) provide a less permanent grip than wire nuts. | |
| 4) A) provide a more permanent grip than wire nuts. | |
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108. 7. What does GFCI stands for? |
|
| 1) D) Ground-Fault Circuit Interpret | |
| 2) C) Ground-Full Circuit Intrrrupter | |
| 3) B) ground-fault circuit Interrupter | |
| 4) A) Ground Functions circuit Interrupter | |
|
109. 8. GFCI outlets exist to protect people from..... |
|
| 1) D) fall | |
| 2) C) electrical shock | |
| 3) B) overcurrent | |
| 4) A) injury | |
|
110. 9. The left slot is called ".........," the right slot is called ".........." and the hole below them is called "..........." |
|
| 1) D) ground; neutral; phase | |
| 2) C) ground; phase; neutral | |
| 3) B) hot; ground; neutral | |
| 4) A) neutral; hot; ground | |
|
111. 10. What is ground fault? |
|
| 1) D) all of them | |
| 2) C) It is a short circuit between one, two or more wires under voltage with different potentials. | |
| 3) B) It is a touch, contact of current-carrying wires of different poles (with different potentials) or parts of electrical wiring, with the appearance of a flash from a plasma arc and possible splashing of molten metal conductors | |
| 4) A) It is an instance in which the hot wire touches any area of a grounded device or even the grounded part of a junction box. | |
|
112. 11. GFCI senses this "........." of power, it trips the circuit and cuts off the electricity. |
|
| 1) D) overcurrent | |
| 2) C) short circuit | |
| 3) B) leakage | |
| 4) A) breakdown | |
|
113. 12. What does newer styles fail "open" mean? |
|
| 1) D) all of incorrect | |
| 2) C) meaning they'll no longer work, but they won't be a health hazard, either. | |
| 3) B) meaning they'll still conduct electricity, obviously a dangerous situation that defeats the whole purpose of CFGIs. | |
| 4) A) meaning they'll for short work,but they won't be a health hazard,either | |
|
114. 13. Which metal is used in incandescent lamp? |
|
| 1) D) tungsten | |
| 2) C) copper | |
| 3) B) iron | |
| 4) A) Gold | |
|
115. 14. Who invented the incandescent lamp? |
|
| 1) D) All of them | |
| 2) C) James Bowman Lindsay | |
| 3) B) Joseph Wilson Suon | |
| 4) A) Thomas Alva Edison | |
|
116. 15. When was the incandescent lamp invented? |
|
| 1) D) 1889 | |
| 2) C) 1933 | |
| 3) B) 1914 | |
| 4) A) 1879 | |
|
117. 16.What is incandescent lamp made of? |
|
| 1) D) glass and aurum | |
| 2) C) plastic and argon | |
| 3) B) plastic and aurum | |
| 4) A) glass and argon | |
|
118. 17.What makes an incandescent lamp work? |
|
| 1) D) all answer is correct | |
| 2) C) static current | |
| 3) B) magnetic field | |
| 4) A) circuit closure | |
|
119. 18. What makes an incandescent lamp give off light? |
|
| 1) D) diffusion | |
| 2) C) aveporation | |
| 3) B) dissolution | |
| 4) A) combustion | |
|
120. 19. What damage does the circuit breaker protect ? |
|
| 1) D) overheating | |
| 2) C) Current leakage | |
| 3) B) exploding and fire | |
| 4) A) overload and short circuit | |
|
121. 20. How does GFCI' s circuit breaker work |
|
| 1) D) constantly monitors the temperature in the circuit | |
| 2) C) constantly monitors current flowing through a circuit. | |
| 3) B) it monitors voltage drop | |
| 4) A) it monitors resistance in the circuit | |
|
122. 21. Is it true or false that GFCI quickly disconnects the current flowing through an unintended ground path even if the amount of current is too small to trip a typical circuit breaker ? |
|
| 1) B) False | |
| 2) A) True | |
|
123. 22. When should GFCI be used? |
|
| 1) D) It uses on 125-250 volt receptacles supplied by single phase branch | |
| 2) C) It uses on high voltage sources | |
| 3) B) It uses on 300- 350 volt receptacles suplied by double phase branch | |
| 4) A) It uses on 50-100 volt receptacles supplied by three phase branch | |
|
124. 23. How many GFCI circuit breakers can be in one circuit? |
|
| 1) D) 1 | |
| 2) C) 2 | |
| 3) A) 4 | |
| 4) B) 5 | |
|
125. 24. Is it true that circuit breaker cannot be reset to resume normal operation |
|
| 1) B) False | |
| 2) A) True | |
|
126. 25. What is conductivity? |
|
| 1) D) capacity to transmit light | |
| 2) Ñ) capacity to transmit heat and current | |
| 3) Â) capacity to resist to current | |
| 4) À) capacity to swim in water | |
|
127. 26. In what directions can electrons flow in the conductors? |
|
| 1) D) Either direction | |
| 2) C) north | |
| 3) A) One direction only | |
| 4) B) None of direction | |
|
128. 27. What elements in periodic table are good electrical conductors? |
|
| 1) D) Halogens | |
| 2) C) First period | |
| 3) B) f-block elements | |
| 4) A) d-block elements | |
|
129. 28. What electrons does when current flows through the conductors? |
|
| 1) D) Don't carry the current and don't move | |
| 2) C) Carry the current from one end to another and move with them | |
| 3) B) Move with the current but don't carry it | |
| 4) A) Carry the current from one end to another, but don't move | |
|
130. 29. How electrons flow in the circuit? |
|
| 1) D) from negative terminal to branches | |
| 2) C) from positive terminal to negative terminal | |
| 3) B) from branches to battery | |
| 4) A) from negative terminal to positive terminal | |
|
131. 30. What is not one of the types of electrical conductors |
|
| 1) D) Insulators | |
| 2) C) Polyconductors | |
| 3) A) Good conductors | |
| 4) B) Semiconductors | |
|
132. 31. What is danger level for overlamping? |
|
| 1) D) All of them. | |
| 2) C) Minimal. | |
| 3) B) Very high. | |
| 4) A) High. | |
|
133. 32. What is NOT the electrical problem from these 4: |
|
| 1) D) Plug falls out of receptacle. | |
| 2) C) Aluminium wiring. | |
| 3) B) Too few outlets. | |
| 4) A) Covered junction box. | |
|
134. 33. When aluminium wiring started in using? |
|
| 1) D) 1980s and 90s. | |
| 2) C) 1910s and 20s. | |
| 3) B) 1940s and 50s. | |
| 4) A) 1960s and 70s. | |
|
135. 34. What is the solution of overlamping? |
|
| 1) D) None of them. | |
| 2) C) Limit of light bulb wattage. | |
| 3) B) Use only 60-watt bulbs or smaller. | |
| 4) A) Limit in the circuits. | |
|
136. 35. What is the solution of too few outlets problem: |
|
| 1) B) limit of using the outlets. | |
| 2) A) Add more outlets. | |
| 3) C) Use less outlets. | |
| 4) D) All of them. | |
|
137. 36. Solution of ungrounded receptacles: |
|
| 1) A) Do not change the outlets. | |
| 2) B) None of them | |
| 3) C) Use without grounding. | |
| 4) D) Replace the outlets. | |
|
138. 37. How much energy do LED lights expend as heat? |
|
| 1) A) 80 percent | |
| 2) B) 5 percent | |
| 3) C) 90 percent | |
| 4) D) 50 percent | |
|
139. 38. Which of the following is NOT a characteristic of LED lights? |
|
| 1) A) long life and ease of maintenance | |
| 2) B) emits multi-directional light | |
| 3) C) instant-on performance | |
| 4) D) resistance to breakage | |
|
140. 39.How long does LED lighting typically last? |
|
| 1) A) 50,000 hours or more | |
| 2) B) 1,000 hours | |
| 3) C) 8,000 to 10,000 hours | |
| 4) D) 30,000 hours | |
|
141. 40. Which kind of lighting did researchers discover was most friendly to the environment? |
|
| 1) A) Incandescent | |
| 2) B) LED | |
| 3) C) Compact fluorescent | |
| 4) D) High-intensity discharge (HID) | |
|
142. 41. How do LED lights help the environment? |
|
| 1) A) consume very little energy | |
| 2) B) contain toxic chemicals | |
| 3) C) less than halogen | |
| 4) D) produce light | |
|
143. 42.Where is LED is used? |
|
| 1) A) underwater stations | |
| 2) B) structures and distribution lines | |
| 3) C) street lights, parking garage lighting, walkway and other outdoor area lighting | |
| 4) D) all of the above | |
|
144. 43. multimeter is used for ___ A) |
|
| 1) A) measuring a.c. and d.c. current, voltage and resistance | |
| 2) B) measuring a.c. current and voltage | |
| 3) C) measuring d.c. current and resistance | |
| 4) D) measuring a.c. voltage and resistance | |
|
145. 44. Analog mulimeters require power supply.b) |
|
| 1) A) True | |
| 2) B) False | |
|
146. 45. While testing voltage, the mulitmeter is connected to the tested component in a parallel connection? |
|
| 1) A) true | |
| 2) B) false | |
|
147. 46. Ammeter measures by __ b) |
|
| 1) A) Parallel | |
| 2) B) Series | |
| 3) C) Resistance | |
| 4) D) All of these | |
|
148. 47. To perform a resistance test you must connect to the component in series? B) |
|
| 1) A) series | |
| 2) B) false | |
|
149. 48. Continuity test is the__ A) |
|
| 1) A) checking of an electric circuit | |
| 2) B) checking voltage | |
| 3) C) checking current | |
| 4) D) checking resistance | |
|
150. 49. Nowadays we prefer to use multiconductor cables because of their ... ? |
|
| 1) A) Convenience of use | |
| 2) B) Low price | |
| 3) C) High strength | |
| 4) D) Multifunctionality | |
|
151. 50. What is conduit? |
|
| 1) A) Wide and long lype of cable | |
| 2) B) Thin type of wires | |
| 3) C) Pipe for protecting cable | |
| 4) D) No correct answer | |
|
152. 1. One of the main functions of personal protective grounds is to provide a _______ impedance path for a short circuit. |
|
| 1) A) High | |
| 2) B) Low | |
| 3) C) Smooth | |
| 4) D) Adequate | |
|
153. 2. A Safety Electrical One Line Diagram should be used to ______________ all sources of electrical energy. |
|
| 1) A) Identify | |
| 2) B)Castigate | |
| 3) C) Evaluate | |
| 4) D) Modify | |
|
154. 3. Work performed on an electrical system within reaching distance of energized components is________work. |
|
| 1) A) Energized | |
| 2) B) Essential | |
| 3) C) Safe | |
| 4) D) Unavoidable | |
|
155. 4. The Prohibited Approach Boundary is considered the same as making_____________. |
|
| 1) A) Insulation | |
| 2) B) Confluence | |
| 3) C) Contact | |
| 4) D) Pastry | |
|
156. 5. The minimum allowable work space around electrical equipment is ________ inches deep. |
|
| 1) A) 36 | |
| 2) B) 48 | |
| 3) C) 24 | |
| 4) D) 30 | |
|
157. 6. The secondary of a current transformer must never be ____________ while energized. |
|
| 1) A) Grounded | |
| 2) B) Opened | |
| 3) C) Examined | |
| 4) D) Shortened | |
|
158. 7. Which is the “Can’t Let Go” range of current flow? |
|
| 1) A) 3-9 ma | |
| 2) B) 9-25 ma | |
| 3) C) 25-60 ma | |
| 4) D) 1-3 ma | |
|
159. 8. OSHA requires the testing of a volt meter after a voltage test on voltage above______. |
|
| 1) A) 120v | |
| 2) B) 208v | |
| 3) C) 277v | |
| 4) D) 600v | |
|
160. 9. One of the three generally recognized hazards of electrical work is____. |
|
| 1) A) Arc Flash | |
| 2) B) Cuts | |
| 3) C) Falls | |
| 4) D) Concussion | |
|
161. 10. Gloves used for electrical protection must be electrically tested every… |
|
| 1) A) 3 months | |
| 2) B) 6 months | |
| 3) C) 12 months | |
| 4) D) Never | |
|
162. 11. The most dangerous place to use electrical equipment is? |
|
| 1) A) indoors | |
| 2) B) near water | |
| 3) C) outdoors | |
| 4) D) near other electrical equipment. | |
|
163. 12. You discover the electrical cord on a drill has been damaged and some of the cord’s insulation is missing. You should? |
|
| 1) A) wrap tape around the damaged spot to prevent electrical shocks. | |
| 2) B) tag the drill out of service and notify the department responsible for equipment maintenance. | |
| 3) C) check to see if the drill still works. | |
| 4) D) make sure that the cord does not come in contact with the floor. | |
|
164. 13. The safest ladder to use around electricity is? |
|
| 1) A) wood | |
| 2) B) fiberglass | |
| 3) C) aluminum | |
| 4) D) a step stool | |
|
165. 14. The earth, water, concrete and the human body are all conductors of electricity |
|
| 1) A) True | |
| 2) A) True | |
|
166. 15. The effects of an electrical shock on the body depend upon all of the following EXCEPT: |
|
| 1) A) body weight | |
| 2) B) current | |
| 3) C) path | |
| 4) C) path | |
|
167. 16. Injuries from electricity can include which of the following? |
|
| 1) A) burns | |
| 2) B) falls | |
| 3) C) electric shock that may or may not result in electrocution | |
| 4) D) all of the above | |
|
168. 17. Open knock outs on outlet boxes: |
|
| 1) A) must be reported and repaired as soon as possible | |
| 2) B) are permitted by OSHA | |
| 3) C) are common because replacing knock outs is expensive | |
| 4) D) pose no hazard as the electrical wiring has been rerouted | |
|
169. 18. Which of the following is acceptable by OSHA standards? |
|
| 1) A) an unqualified employee flipping tripped breakers in a breaker box | |
| 2) B) plugging and extension cord into a second extension cord | |
| 3) C) removing a ground pin if needed to plug into a two prong outlet | |
| 4) D) a qualified person repairing an extension cord | |
|
170. 19. Flexible cords can be used in the workplace: |
|
| 1) A) as a substitute for permanent wiring | |
| 2) B) if they are run behind walls to reduce the chance of abrasion and damage | |
| 3) C) if heavy or extra heavy duty cords are needed for temporary purposes | |
| 4) D) if any obvious splices are repaired with electrical tape | |
|
171. 20. It is the responsibility of all employees to understand and use electrical safety everyday. A. True B. False |
|
| 1) A) True | |
| 2) B) False | |
|
172. 21. What is not one of the elements of equipment labeling? |
|
| 1) A) Nominal system voltage | |
| 2) B) Company information | |
| 3) C) Arc Flash Boundary | |
| 4) D) Minimum arc rating of clothing | |
|
173. 22. Which of the following is an approach boundary? |
|
| 1) A) Limited Approach Boundary | |
| 2) B) Extended Approach Boundary | |
| 3) C) Arc Flash Boundary | |
| 4) D) Minimum Approach Boundary | |
|
174. 23. What is considered appropriate personal protective equipment when doing electrical work? |
|
| 1) A) Balaclava | |
| 2) B) Arc Flash Suit | |
| 3) C) Rubber gloves | |
| 4) D) all the above | |
|
175. 24. Which of the following is not why shock risk assessments are performed? |
|
| 1) A) To identify shock hazards | |
| 2) B) To estimate the likelihood of occurrence of injury or damage to health and the potential severity of injury or damage to health | |
| 3) C) To assess the strength of PPE gear on shock hazards | |
| 4) D) To determine if additional protective measures are required, including the use of PPE | |
|
176. 25. If an unqualified person is working on an elevated position near overhead lines, the following distance must be kept between them and the longest conductive object that is unguarded or energized: |
|
| 1) A) The person must keep at least 5 feet of distance for voltages to ground 50kV or below | |
| 2) B) The person must keep at least 10 feet of distance for voltages to ground 50kV or below | |
| 3) C) The person must keep 10 feet plus 4 inches for every 10kV over 50kV | |
| 4) D) The person must keep at least 10 feet of distance for voltages to ground 50kV or below AND The person must keep 10 feet plus 4 inches for every 10kV over 50kV | |
|
177. 26. If work is done on overhead lines, they must be: |
|
| 1) A) Deenergized | |
| 2) B) Grounded | |
| 3) C) Insulated | |
| 4) D) Deenergized AND Grounded | |
|
178. 27. How is the arc rating expressed? |
|
| 1) A) J/in² | |
| 2) B) cal/cm² | |
| 3) C) cal/in² | |
| 4) D) J/cm³ | |
|
179. 28. A factory assemble cable of one or more conductors each individually insulated and enclosed in a metallic sheath of interlocking tape of smooth or corrugated tube. This type of cable is especially used for service feeders, branch circuit and for indoor, outdoor work. What is this cable? |
|
| 1) A) Metal Clad Cable (MC) | |
| 2) A) Metal Clad Cable (MC) | |
| 3) C) Armor Cable (AC) | |
| 4) D) Underground Feeder (UF) | |
|
180. 29. If the voltage is 12 volts and the resistance is 2, how many amps do you have? |
|
| 1) A) 6 | |
| 2) B) 4 | |
| 3) C) 3 | |
| 4) D) 8 | |
|
181. 30. Which of the following is an example of a load in a circuit? |
|
| 1) A) Bulb | |
| 2) A) Bulb | |
| 3) C) Fuse | |
| 4) D) Wire | |
|
182. 31. If the circuit is continuous from the battery, through all the wires and components, and back to the battery ground it is said to have |
|
| 1) A) Continuity | |
| 2) B) A short to ground | |
| 3) C) a short to voltage | |
| 4) D) High resistance | |
|
183. 32. Which of the following is not a circuit protection device? |
|
| 1) A) Relay | |
| 2) B) Fuse | |
| 3) C) Circuit Breaker | |
| 4) D) Fusible Link | |
|
184. 33. A good insulator has 6 to 8 ____________________ in the valance of an atom. |
|
| 1) A) electrons | |
| 2) B) protons | |
| 3) C) neutrons | |
| 4) D) neutrinos | |
|
185. 34. Copper wire is a good ______________________________. |
|
| 1) A) conductor | |
| 2) B) insulator | |
| 3) C) resistor | |
| 4) D) power source | |
|
186. 35. A complete circuit that has only one path to ground is called a _______________________ circuit |
|
| 1) A) series | |
| 2) B) parallel | |
| 3) C) short | |
| 4) D) series-parallel | |
|
187. 36. What does a battery electrical drain test determine? |
|
| 1) A) If a component is causing the power to drain from the battery | |
| 2) B) Checks to be sure electrolyte is not leaking from the battery. | |
| 3) C) Checks to see if the battery is pushing enough voltage to the vehicle components. | |
| 4) D) Makes sure that the alternator is constantly charging the battery. | |
|
188. 37. What should you disconnect one at time to find a parasitic drain? |
|
| 1) A) Sum | |
| 2) B) Quotient | |
| 3) C) Remainder | |
| 4) D) Voltage | |
|
189. 38. If a series circuit has 4 resistors that are 2 ohms each, the total resistance of the circuit would be: |
|
| 1) A) 8 | |
| 2) B) 10 | |
| 3) C) 6 | |
| 4) D) 2 | |
|
190. 39. A circuit with 4 ohms of resistance and 3 amps would have _________________ volts. |
|
| 1) A) 12 | |
| 2) B) 7 | |
| 3) C) 1 | |
| 4) D) 1,33 | |
|
191. 40. When using a digital multimeter the black lead connects to the hole marked _________________________. |
|
| 1) A) COM | |
| 2) B) V | |
| 3) C) A | |
| 4) D) None of the above | |
|
192. 41. A ____________________circuit has more than one path to ground. |
|
| 1) A) parallel | |
| 2) B) series-parallel | |
| 3) C) series | |
| 4) D) short | |
|
193. 42. When measuring with a digital multimeter on an automotive vehicle for voltage you should select the_______________ symbol on the selector dial. |
|
| 1) A) DC | |
| 2) B) mA | |
| 3) C) AC | |
| 4) C) AC | |
|
194. 43. If a circuit has no continuity is is said to be ______________. |
|
| 1) A) open | |
| 2) B) closed | |
| 3) C) shorted to ground | |
| 4) D) shorted to voltage | |
|
195. 44. When your digital multimeter reads an open circuit it will usually have ___________ on the screen of the multimeter. |
|
| 1) A) OL | |
| 2) B) 0000. | |
| 3) C) ? | |
| 4) D) 1. | |
|
196. 45. Which of the following locations in dwelling units require GFCI protection? |
|
| 1) A) Receptacles within garages | |
| 2) B) Receptacle dedicated to a burglar alarm | |
| 3) C) Receptacles in finished basements | |
| 4) D) Receptacles in bedroom | |
|
197. 46. Which of the following circuits require a minimum of 20A of overcurrent protection? |
|
| 1) A) Receptacles within garages | |
| 2) B) Residential large appliance branch circuits | |
| 3) C) General purpose branch circuits | |
| 4) D) fixed appliance branch circuits | |
|
198. 47. Romex is a trade name for _________? |
|
| 1) A) Type NM cable | |
| 2) B) Type MC cable | |
| 3) C) Type TC cable | |
| 4) D) Type UF cable | |
|
199. 48. Which of the following must be supported at intervals of 6 feet or less? |
|
| 1) A) Type MC | |
| 2) B) Type NM | |
| 3) C) Type UF | |
| 4) D) EMT | |
|
200. 49. Which of the following will detect a current imbalance as low as 4 milliamps? |
|
| 1) A) Gfci | |
| 2) B) Afci | |
| 3) C) Tamper Resistant Outlet | |
| 4) D) EMT | |
|
201. 50. Traveler conductors are used to connect two __________? |
|
| 1) A) Gfci | |
| 2) B) Afci | |
| 3) B) Afci | |
| 4) D) EMT | |
|
202. 1. How much should be the distance of the outlet from the floor? |
|
| 1) a) 10 cm | |
| 2) b) 60 cm | |
| 3) c) 30 cm | |
| 4) d) 50 cm | |
|
203. 2. How much should be the distance of the switch from the floor? |
|
| 1) 90 cm | |
| 2) 120 cm | |
| 3) 150 cm | |
| 4) 60 cm | |
|
204. 3. The distance of the switch from the doorways? |
|
| 1) 5 cm | |
| 2) 10 cm | |
| 3) 20 cm | |
| 4) 30 cm | |
|
205. 4. The distance of the wiring from the ceiling? |
|
| 1) 50 cm | |
| 2) 30 cm | |
| 3) 25 cm | |
| 4) 15 cm | |
|
206. 5. What is the name of the tray with holes? |
|
| 1) perforated | |
| 2) non-perforated | |
| 3) ladder | |
| 4) open | |
|
207. 6. What is the name of the tray without holes? |
|
| 1) perforated | |
| 2) non-perforated | |
| 3) open | |
| 4) ladder | |
|
208. 7. What kind of cable tray is used in order to protect from chemical hazardous? |
|
| 1) perforated | |
| 2) non-perforated | |
| 3) open | |
| 4) ladder | |
|
209. 8. The height of trays from the floor level or the service area? |
|
| 1) 3 m | |
| 2) 1 m | |
| 3) 4 m | |
| 4) 2 m | |
|
210. 9. In cable tray the number of wires in the bundle should be no more than…? |
|
| 1) 12 | |
| 2) 8 | |
| 3) 16 | |
| 4) 4 | |
|
211. 10. What is the name of laying a cable in a tray without gaps? |
|
| 1) bundles | |
| 2) packages | |
| 3) row | |
| 4) multi-laying | |
|
212. 11. What is the size of cable which is used in general lighting system? |
|
| 1) 2.5 mm² | |
| 2) 1.5 mm² | |
| 3) 4 mm² | |
| 4) 6 mm² | |
|
213. 12. What is the size of cable which is used for domestic sockets? |
|
| 1) 2.5 mm² | |
| 2) 1.5 mm² | |
| 3) 6 mm² | |
| 4) 4 mm² | |
|
214. 13. Colour code of 45 A rewireable fuse? |
|
| 1) Green | |
| 2) Red | |
| 3) Black | |
| 4) Yellow | |
|
215. 14. Current rate of rewireable fuse with blue colour code? |
|
| 1) 20 A | |
| 2) 10 A | |
| 3) 15 A | |
| 4) 5 A | |
|
216. 15. Colour code of 13 A cartridge fuse? |
|
| 1) Black | |
| 2) Green | |
| 3) Red | |
| 4) Brown | |
|
217. 16. IEE Wiring Regulations stipulate that a single ring main may not serve an area larger than? |
|
| 1) 100 m² | |
| 2) 50 m² | |
| 3) 120 m² | |
| 4) 80 m² | |
|
218. 17. Ring socket circuits are generally installed with |
|
| 1) 4 mm² two-core-and-earth cable | |
| 2) 4 mm² two-core-and-earth cable | |
| 3) 1.5 mm² two-core-and-earth cable | |
| 4) 1.5 mm² three-core-and-earth cable | |
|
219. 18.Radial circuit using 2.5 mm² two-core-and-earth cable can serve an area no greater than? |
|
| 1) 75 m² | |
| 2) 50 m² | |
| 3) 100 m² | |
|
220. 19.Radial circuit using 4 mm² two-core-and-earth cable can serve an area no greater than? |
|
| 1) 75 m² | |
| 2) 50 m² | |
| 3) 100 m² | |
| 4) 120 m² | |
|
221. 20.Individual lighting Circuits are designed to support a maximum? |
|
| 1) 900W | |
| 2) 1500W | |
| 3) 800W | |
| 4) 1100W. | |
|
222. 21.What is a current produced in a coil moving in a magnetic field called? |
|
| 1) Induced emf | |
| 2) Induced potential | |
| 3) Induced current | |
| 4) Induced flow | |
|
223. 22.What makes the electric motor work? |
|
| 1) Faraday's law | |
| 2) Ohm's law | |
| 3) Newton's law | |
| 4) Kirchhoff's law | |
|
224. 23.A circuit must have which of the following? |
|
| 1) Energy source, battery, load | |
| 2) Energy source, wire, load | |
| 3) Energy source, wire, switch | |
| 4) Battery, wire, switch | |
|
225. 24.What is the term for the place where electricity flows into a battery? |
|
| 1) Positive terminal | |
| 2) Switch | |
| 3) Negative terminal | |
| 4) Insulator | |
|
226. 25.A power source that can produce an electric current as a result of a chemical change in it is a/an? |
|
| 1) Circuit | |
| 2) Wire | |
| 3) Battery | |
| 4) Filament | |
|
227. 26.What is static electricity caused by? |
|
| 1) A balance of power | |
| 2) A balance of positive and negative charges | |
| 3) An imbalance of positive and negative charges | |
| 4) A balance of various positive charges | |
|
228. 27.Receiving an electric shock from a doorknob is an example of _______ |
|
| 1) Spontaneous electricity | |
| 2) None | |
| 3) Current electricity | |
| 4) Static electricity | |
|
229. 28.Which of these is NOT required in order to have a complete circuit? |
|
| 1) Source of electricity | |
| 2) Light switch | |
| 3) Load or resistor | |
| 4) Wires or path | |
|
230. 29.Why do we coat wires with plastic or rubber? |
|
| 1) All of these are correct. | |
| 2) Because those materials look nicer than copper wire | |
| 3) Because they are flexible | |
| 4) Because those materials are good insulators | |
|
231. 30.A drawing that uses symbols to show how the parts of an electric circuit are connected is a/an? |
|
| 1) Parallel circuit | |
| 2) Circuit diagram | |
| 3) Nichrome wire | |
| 4) Electric diagram | |
|
232. 31.A low-resistance connection established by accident or intention between two points in an electric circuit is known as _______________. |
|
| 1) Closed circuit | |
| 2) Short circuit | |
| 3) Open circuit | |
| 4) Direct circuit | |
|
233. 32.What is the function of a fuse? |
|
| 1) A wire with high resistance to prevent current from passing through | |
| 2) Another name for a switch | |
| 3) A protective device for breaking an electric circuit. | |
| 4) A protective device to slow down the current | |
|
234. 33.When you attach a battery to an electric light bulb, what process makes the bulb light up? |
|
| 1) Chemicals moving from the battery through the wire | |
| 2) Protons flowing from the battery into the bulb | |
| 3) Electrons flowing through the circuit | |
| 4) All of these | |
|
235. 34.What kind of charge does an electron have? |
|
| 1) Neutral | |
| 2) Negative | |
| 3) Positive | |
| 4) It depends | |
|
236. 35.What is the resistivity of copper? |
|
| 1) 8 ohms | |
| 2) 2.4 ohms | |
| 3) 10.7 ohms | |
| 4) None of the above | |
|
237. 36.A passive two-terminal electrical component that produces electrical resistance in a circuit is called what? |
|
| 1) Capacitor | |
| 2) Inductor | |
| 3) Resistor | |
| 4) Battery | |
|
238. 37.Electric power equals to the product of voltage and ______ |
|
| 1) Inductance | |
| 2) Resistance | |
| 3) Current | |
| 4) Time | |
|
239. 38.Please determine the column of the safety protective devices: |
|
| 1) Multimeter, clamp meter, MCB | |
| 2) MCB, RCD, fuse | |
| 3) MCB, Multimeter, fuse | |
| 4) MCB, Multimeter, fuse | |
|
240. 39.A simple device that opens and closes an electrical unit is called a(an): |
|
| 1) Volt | |
| 2) Discharge | |
| 3) Switch | |
| 4) Ampere | |
|
241. 40.This is the unit of measurement for measuring electrical pressure or EMF? |
|
| 1) Switch | |
| 2) Volt | |
| 3) Ampere | |
| 4) Electrode | |
|
242. 41.If there is a break in the path the current follows, the circuit is incomplete. A break in the path is called an |
|
| 1) Open circuit | |
| 2) Open circuit | |
| 3) Load Rejection | |
| 4) Electromotive Force | |
|
243. 42.A circuit is a path taken by a current. A path with no breaks is called a |
|
| 1) Closed-circuit | |
| 2) Capacitor | |
| 3) Circuit Breaker | |
| 4) Variable Resistor | |
|
244. 43.A fine wire that becomes hot and produces light when an electric current passes through it is called a |
|
| 1) Filament | |
| 2) Nichrome wire | |
| 3) Circuit | |
| 4) Wire | |
|
245. 44.What is the most efficient type of power plant? |
|
| 1) nuclear power plant | |
| 2) hydroelectric power plant | |
| 3) heat power plant | |
| 4) tidal power plant | |
|
246. 45.What is the main function of a transformer? |
|
| 1) Convert mechanical energy into electrical | |
| 2) Changing the voltage level | |
| 3) Convert AC current into DC or vice versa | |
|
247. 46.Which disease is NOT caused by the electromagnetic field of substations? |
|
| 1) Cancer | |
| 2) Infertility | |
| 3) heart problem | |
| 4) Diarrhea | |
|
248. 47.What are insulators are NOT made from? |
|
| 1) Glass | |
| 2) Porcelain | |
| 3) Polymer | |
| 4) PVC | |
|
249. 48.According to the Rules of electrical installations, the distance from the wires to the ground of the 10 kV overhead line should be ____ |
|
| 1) 6 m | |
| 2) 8 m | |
| 3) 9 m | |
|
250. 49.On the overhead line with the removed voltage to monitor the condition of insulators, the insulation resistance is measured with a ________ megaohmmeter |
|
| 1) 5000 V | |
| 2) 500 V | |
| 3) 2500 V | |
| 4) 1000 Ì | |
|
251. 50.The distance between the points of attachment of wires to insulators installed on the walls should not exceed ____ |
|
| 1) 1 m | |
| 2) 50 cm | |
| 3) 1.5 m | |
| 4) 2 m | |