Electrical Practice Exam

Flexible metal conduit is sometimes referred to as? Correct answer- Greenfield 2. What do you look for to determine if a switch or receptacle is acceptable for copper and aluminum wiring? Correct answer- CO/ALR 3. What type of receptacle should not be used with aluminum branch circuits wiring any longer? Correct answer- CU/AL 4. What type of wire nut is not appropriate for aluminum wire? Correct answer- Conventional 5. What is another name for a grounding rod? Correct answer- Electrode 6. What is the purpose of a circuit breaker? Correct answer- Interruption of electrical flow 7. What are two examples of automatic circuit breakers? Correct answer- Fuses and Breakers 8. What is another term for NM sheathed cable? Correct answer- Romex 9. Minimum distance of a GFCI from a bathtub or shower: Correct answer- 0 by the code (36 by the brown book, but on exam it should be 0) 10. Maximum distance of an outlet from a lavatory/basin: Correct answer- 3' 11. Which is deficient? Correct answer- Unused opening that has been taped 12. A device designed to open and close a circuit by non-automatic means and applied within its rating to open the circuit automatically when predetermined over-current is called? Correct answer- Circuit Breaker 13. Type NM wiring shall be supported a maximum of _______ on center. Correct answer- 4.5 feet 14. At a kitchen counter, countertop receptacle outlets shall be installed within a maximum horizontal distance of _______ from any point along the wall to an outlet. Correct answer- 24 inches 15. Which of the following is a good conductor? Correct answer- Copper,Aluminum & Silver (All of the above) 16. Is the service drop overhead or underground? Correct answer- Overhead 17. Are service laterals overhead or underground? Correct answer- Underground 18. The drip loop is typically part of the service drop. Correct answer- False (It is part of the service entrance) 19. Which of the following is a reliable way to identify the service size? Correct answer- The service entry conductor size 20. Which of the following is a safety issue? Correct answer- The main fuses have a higher rating than the service entrance wire. 21. How should the feeder wires to a sub-panel from the main panel ideally be protected? Correct answer- Fuses should be provided at the main panel 22. Which of the following wires are stranded? Correct answer- #8, #6 (Both C and D) 23. Bonding the gas piping to the supply plumbing system mean that: Correct answer- Any stray electrical current will not cause arcing, which otherwise could ignite the gas 24. Polarity occurs when? Correct answer- Electrical receptacle is connected (properly) 25. What is required to be installed in unfinished basements or exterior walls? Correct answer- GFCI 26. Report as deficient breaker boxes that are? Correct answer- Installed in hazardous location/safety issue 27. Antioxidants do what? Correct answer- Prevent oxidation 28. Nicked wire causes what to happen? Correct answer- ARC's 29. Can BX cable be used at receptacle outlets? Correct answer- Yes, metal only. BX and Greenfiled are interchangeable 30. 18 gauge lamp cord where is it commonly used/installed? Correct answer- Entry/Breakfast table area/ dining room 31. 15 AMP circuits are used where? Correct answer- Branch circuit wiring 32. What is required for electrical receptacles for a swimming pool motor? Correct answer- Twist Lock and GFCI 33. How should 18 gauge speaker wire be installed in a ceiling? Correct answer- Mounting Bracket 34. What is meant by open splice? Correct answer- A connection not made inside a junction box 35. Where is the antioxidant grease typically used? Correct answer- On stranded aluminum wiring 36. The most common wire size for branch household circuits is ______ gauge. Correct answer- 14 gauge 37. Wire should not be run on wall surfaces without Correct answer- Mechanical protection 38. Isolating link should be used with a light that has metal pull chains. The isolating link is made of: Correct answer- Cardboard or plastic 39. In a garage an outlet must be a minimum of ______ inches above the floor. Correct answer- 18" inches 40. A 3 wire system is coming into the house at 110. What is it called? Correct answer- 110/220 41. On a deck, porch or patio which is required? Correct answer- Illumination 42. If a conductor wire is nicked, what does it do to the wire? Correct answer- Lose Amperage 43. What the maximum number is of disconnects needed to terminate service? Correct answer- 6 disconnects 44. If you have an A/C unit outside disconnect on a 1960 house with a 35 amp breaker, and the owners have it on a 60 amp breaker. Correct answer- Deficient, write it up 45. If you had a 1960's house and the panel box is in the closet with clothes touching it Correct answer- Deficient, write it up 46. What is the maximum length of a Stove Cord? Correct answer- 6' ft max 47. What is the length of cord for a plug and pull lamp? Correct answer- 6' ft 48. You have a panel rated at 200 AMPS, you have 195 AMPS in use, a breaker at 25 Correct answer- It is okay 49. Over current protection for Copper is Correct answer- 14AWG/15 AMPS 50. Over current protection for Aluminum wiring is Correct answer- 12 AWG/15 AMPS 51. A kitchen counter is 8' long. It may have a maximum of Correct answer- 48" inches of space between receptacle within 2' ft along the counter 52. Which of the following are not approved methods of connecting aluminum wiring? Correct answer- Twist Lock 53. If you had a 10 gauge copper wire rated for amperage what size aluminum wire would you need? Correct answer- 8 54. Where would you find a GFCI on a hydrotherapy tub? Correct answer- All of these are true: under the tub, many times inaccessible, it is not required to be within sight of the motor 55. How high above the spa would the light fixture need to be installed? Correct answer- 7' 6" 56. A house was built in 1955 and the inspector notices the wires have a silver coating. What type of wiring is this? Correct answer- Nickel coated copper (clad) 57. Overhead wire clearance must be a minimum of how many feet above walking surfaces? Correct answer- 10' 58. Overhead wire clearances must be how many feet above residential properties and driveways? Correct answer- 12' 59. Overhead wires must be at least how many feet over a flat roof? Correct answer- 8' feet 60. Service conductors must be located at least how many feet from sides of doors,porches, decks, stairs, and operable windows? Correct answer- 3' feet 61. Clearance in any direction from the diving platform of a swimming pool is how many feet? Correct answer- 14' 5" or 14in older code 62. How far from a spa/hot tub must a receptacle outlet be located? Correct answer- 5' feet 63. How many milli amps does it take to trip a GFCI outlet? Correct answer- 5 to 8 mil (4-6 mil for breaker trip) 64. How many seconds does it take to trip a GFCI? Correct answer- 1/40th second 65. Where must a light switch be for a light in the stairwell? Correct answer- Top an bottom of well 66. What min. size breaker is needed for a water heater that has 4500 watts and 240 volts? Correct answer- 25 amp 67. How many 20 amp breakers must service a kitchen? Correct answer- 2 68. How long can an electrical cord be for pool pumps? Correct answer- 3' feet 69. How far from a pool can an electrical breaker box be located? Correct answer- 5' feet 70. Electrical lines must be a minimum of how many feet above a pool? Correct answer- 22.5' or 22' -2003 71. What is the size of a ferrous grounding rod? Correct answer- 5/8" (1/2" copper or non ferrous) 72. In a multi wire branch circuit, with the red and black wire improperly tapped from the same bus, if the red wire carries 10 amps, and the black wires carries 12 amps, the neutral wire will carry? Correct answer- 22 amps (unsafe condition on a 14 gauge wire) 73. If you used a multimeter to measure the current in a 3,000 watt electric water heater that uses both of the underground (hot) service conductors, it would read? Correct answer- 12.5 amps 74. Which of the following is not a common service amperage? Correct answer- 175 amp 75. A panel is servicing an indoor pool area, and is not in mechanical room next to the pool. You should be looking for? Correct answer- rust problems 76. Clamp on amp meters may be used on electric furnaces to check Correct answer- that all the elements come on 77. Assuming copper, standard wire type and normal temperature rating, what is the typical conductor size in AWG for a 100 amp service? Correct answer- #4 78. A 1,500 square foot house has an electric stove, electric dryer, central air conditioning (FLA + 18 amps), and a recent basement renovation that included the installation of a 3,000 watt sauna. If it has a 60 amp service, you should report that? Correct answer- The service should be upgraded 79. Double tapping is? Correct answer- The term for attaching two wires to a single fuse or breaker terminal 80. In the service box, the underground service entrance wires should be connected Correct answer- to the line side of the main switch 81. Abandoned wires should be Correct answer- Removed 82. You notice that the service drop and service entrance conductors are bare at the splice. You should Correct answer- Report this as a safety hazard 83. Which of the following aluminum wire installations is most likely to over heat? Correct answer- A receptacle with an electric heater 84. A copper #6 gauge cable has supplied a sub panel. The cable is protected by 60 amp breakers at the main panel. You should make sure that Correct answer- The sub panel is rated to handle at least 60 amps 85. A house has service entrance conductors designed for 100 amps and a main disconnect rated at 100 amps. Which of these conditions is unsafe? Correct answer- The service box is rated at 75 amps 86. A subpanel is supplying a 3 ton air conditioning (running load amps=18A) and an electric dryer (5,000W). The 10 gauge copper subpoena feed wire is connected to a 60A breaker in the main panel. You should Correct answer- recommend changing the size of the feed wire to match the breaker 87. Two reasons for dedicated circuits are that Correct answer- The circuit uses so much electricity, and the circuit is so important 88. During an inspection you find a 20 amp and a 15 amp blown fuses beside the panel, you might tell your client that Correct answer- it's likely that there is at least one overloaded circuit in the panel 89. What size wire should go to a grounding rod? Correct answer- #6 copper 90. What size breaker would you find on a dryer? Correct answer- 30 amp 91. What effects polarity? Correct answer- Hot and neutral crossed 92. What size is the wire for a UFER ground? Correct answer- #4 copper (if rebar is used it is also #4 rebar 20ft long)