Residential Wiring Term 4 Final Review
54. Lighting fixtures marked "Recessed Fluorescent Luminaire" ____ permitted to be installed in a suspended ceiling. are or aren't?
Are
18. On the outside of a building, position and fasten lead-in conductors so they cannot swing closer than 24 in. (600 mm) to light and power conductors having not over 250 volts between conductors; 8 ft (3.0 m) if over 250 volts between conductors. True or False?
False
34. According to NFPA 72, fire warning equipment has two primary purposes: to provide protection to property, and to provide a reliable means to notify the occupants of the presence of a threatening fire and the need to escape to a place of safety. True or False
False
41. Fire is the second leading cause of accidental death. True or False
False
58. Antennas and lead-in conductors may be attached to an electric service mast if they are kept a minimum of 36 in. (900 mm) below the power conductors. True or False?
False
70. When a food-waste disposer has an integral ON-OFF switch, an additional separately installed switch ____ required. Is or isn't?
Isn't
25. Plug-in detectors are not permitted in new construction. True or false?
True
36. The photoelectric type of alarm is less effective for gasoline and alcohol fires, which do not produce heavy smoke. True or False
True
39. NFPA 72 29.1.2 states that smoke and heat alarms shall be installed in all occupancies where required by governing laws, codes, or standards. This puts the responsibility on the local building department. True or False?
True
17. In newly constructed homes, smoke detectors are required to have ____ for the primary source of power. a. 120-volt ac b. 24-volt dc c. a lithium-ion battery d. an emergency micro-generator Feedback
a. 120-volt ac
26. A feeder or service neutral load can be figured at ____ of the load on the ungrounded conductors for ranges and ovens. a. 70 percent b. 80 percent c. 125 percent d. none of the above
a. 70 percent
43. The type of cable most often used for television signal distribution in new residences is ____. Select one: a. 75-ohm RG6 coaxial b. 150-ohm unshielded twisted-pair c. 300-ohm twin-lead d. Type FLP
a. 75-ohm RG6 coaxial
19. Residential telephone conductor installations must be made in accordance with the requirements of ____. a. Article 800 b. Article 810 c. Article 820 d. none of the above
a. Article 800
52. Fire-protective signaling systems installed in homes have ____ circuits where the power output is limited by the listed power supply for the system. a. Type PLFA b. Type FPLR c. Type CMP d. Type NPLFP
a. Type PLFA
31. When someone decides to use a bedroom as a home office instead, ____. a. a lot of electronic equipment will have to be plugged in b. the NEC requirements for lighting changes drastically c. a special dimming ballast would be required d. receptacle requirements will not change
a. a lot of electronic equipment will have to be plugged in
16. When installing a ceiling paddle fan, the outlet box must be ____. a. listed and marked as acceptable for fan support b. metallic c. secured by four screws d. all of the above
a. listed and marked as acceptable for fan support
32. Recessed or surface-mounted luminaires and recessed exhaust fans may be located within the restricted zone near the bathtub. a. may b. may not
a. may
1. The NEC _____ in a dwelling. a. requires at least one communication outlet b. requires one communication outlet on each floor c. requires one communication outlet in each habitable room. d. does not require a communication outlet
a. requires at least one communication outlet
14. A ____ is described in the NEC as any electric circuit that energizes signaling equipment. a. signaling circuit b. code-calling system c. signal light system d. code circuit
a. signaling circuit
21. The sound level rating used to define fan noise is expressed in ____. a. sones b. decibels c. tenor d. ran
a. sones
24. Sliding glass panels ____ considered to be wall space, the same as any other interior or exterior door. a. are b. are not
are not
49. The load for each small-appliance, branch circuit load is required to be calculated at ____. a. 1,440 watts b. 1,500 volt-amperes c. 1,920 watts d. 2,400 volt-amperes
b. 1,500 volt-amperes
64. When a separate branch-circuit is run to a wall-mounted oven or to a counter-mounted cooking unit, the branch circuit size is based on ____ of the nameplate rating of the appliance. a. 80 percent b. 100 percent c. 125 percent d. none of the above
b. 100 percent
69. Article ____, Part VI, covers equipment grounding and equipment grounding conductors. a. 210 b. 250 c. 400 d. 422
b. 250
68. Ceiling fan boxes designed to support more than ____ pounds must have the maximum weight they are designed to support included in the marking. a. 25 b. 35 c. 50 d. 70
b. 35
9. A smoke alarm on a flat ceiling shall be mounted at least ____ in. away from the corner. a. 2 b. 4 c. 8 d. 12
b. 4
22. Transformers and low-voltage wiring for doorbells are classified as ____ circuits under Article 725. a. Class 1 b. Class 2 c. Class 3 d. none of the above
b. Class 2
50. A duplex grounding-type receptacle is usually installed in an accessible location under the sink for plugging in the dishwasher and food waste disposer, and it does not have to be ____ protected. a. AFCI b. GFCI c. assured grounding conductor d. IDCI
b. GFCI
57. When 120-volt receptacles and TV outlets are mounted in double-gang boxes, ____ is required in the box to isolate the TV conductors from the power wiring. a. a metal EMI shield b. a barrier c. double-grounding d. double-insulation
b. a barrier
8. GFCI-protected receptacles ____ permitted to be installed within a tub or shower space. a. are b. are not
b. are not
44. The selection of outlet boxes and switch boxes is made by the electrician. These decisions are based on Code requirements, space allowances, good wiring practices, and ____. a. homeowner's preferences b. common sense c. city building codes d. cost
b. common sense
2. A(n) ____ is a device suitable for connection to a circuit that has a sensor that responds to a physical stimulus such as heat or smoke. a. alarm b. detector c. smoke alarm d. alarm system
b. detector
65. Which of the following switch types is rarely used in residential wiring? Select one: a. single-pole b. double-pole c. three-way d. four-way
b. double-pole
28. Cord sets rated 30 amperes are usually called ____cords, and cord sets rated 40, 45, or 50 amperes are called ____ cords. a. SJT, SJ b. dryer, range c. heavy-duty, extra heavy-duty d. washer, dryer
b. dryer, range
62. Because of the dangers associated with the open neutral (grounded conductor), NEC 300.13(B) does not permit the continuity of the ____ conductor to depend on a receptacle. a. ungrounded b. grounded (neutral) c. both a and b d. none of the above
b. grounded (neutral)
61. Receptacles installed on 15- and 20-ampere branch circuits must be of the ____ type. a. duplex b. grounding c. ground-fault protected d. arc-fault protected
b. grounding
38. The NEC defines a kitchen as an area with a sink and ____ provisions for food preparation and cooking. a. at least temporary b. permanent c. normal d. stationary
b. permanent
60. Small-appliance circuits are intended to serve countertops for cord-connected ____ appliances only. a. under 1/3 horsepower b. portable c. fixed-in-place d. none of the above
b. portable
45. For appliances that have no marked maximum overcurrent protection, the branch-circuit overcurrent protection is sized at ____. a. the maximum amount possible b. the ampacity of the branch-circuit conductors supplying the appliance c. 30 amperes maximum d. none of the above
b. the ampacity of the branch-circuit conductors supplying the appliance
40. Countertop receptacles must be served by at least ____-ampere small appliance circuits. a. one 20 b. two 20 c. one 15 d. two 15
b. two 20
20. The 125-volt, 20-ampere receptacles installed to serve kitchen countertops are required to have GFCI protection ____. a. when they are within 6 feet of the sink b. under all circumstances c. unless provided with assured grounding conductor protection d. none of the above
b. under all circumstances
46. The maximum volt-ampere loading permitted on a 20-ampere branch circuit with a continuous load is ____. a. 1,440 VA b. 1,800 VA c. 1,920 VA d. 2,400 VA
c. 1,920 VA
48. A wall-mounted smoke alarm shall not be mounted further than ____ in. from the corner where the ceiling meets the wall. a. 4 b. 8 c. 12 d. 24
c. 12
7. Receptacle outlets must be installed in any wall space ____ or more in width. a. 12 in. (300 mm) b. 18 in. (450 mm) c. 24 in. (600 mm) d. 36 in. (900 mm)
c. 24 in. (600 mm)
72. Receptacle outlets must be installed in any wall space ____ or more in width. a. 12 in. (300 mm) b. 18 in. (450 mm) c. 24 in. (600 mm) d. 36 in. (900 mm)
c. 24 in. (600 mm)
53. The maximum flexible cord length permitted for a kitchen waste disposer is ____. a. 18 in. (450 mm) b. 24 in. (600 mm) c. 3 ft (900 mm) d. 6 ft (1.8 m)
c. 3 ft (900 mm)
29. Television antennas and lead-in wires are covered under Article ____. a. 240 b. 725 c. 810 d. 820
c. 810
3. The article that covers cable TV wiring installations in residences is Article ____. a. 725 b. 810 c. 820 d. none of these
c. 820
11. Which of the following kitchen equipment is permitted to be connected to the two 20-ampere small-appliance circuits required for the kitchen and dining room area? a. lighting b. exhaust fan c. clock outlet d. none of the above
c. clock outlet
30. The National Fire Alarm Code (NFPA 72) requires that fire alarm equipment be ____. a. heavy-duty b. redundant c. listed d. both a and c
c. listed
6. On all types and ratings of receptacles, the grounding blade is ____ than the others to ensure that it makes its connection before the grounded conductors do and breaks its connection after they do (first make-last break). a. larger IncorrectIncorrect b. more durable c. longer d. tarnish-resistant
c. longer
23. A raised plaster cover (often called a plaster ring or mud ring) is permitted to increase the maximum number of conductors permitted in an outlet box when it is ____. a. listed as a box extension b. by the same manufacturer as the box c. marked with its cubic-inch volume d. metallic and capable of being grounded
c. marked with its cubic-inch volume
56. A raised plaster cover (often called a plaster ring or mud ring) is permitted to increase the maximum number of conductors permitted in an outlet box when it is ____. a. listed as a box extension b. by the same manufacturer as the box c. marked with its cubic-inch volume d. metallic and capable of being grounded
c. marked with its cubic-inch volume
15. When designing a home office, you could consider roughing in more wall receptacles than the NEC ____. a. maximum b. recommends c. minimum d. and builder recommend Feedback
c. minimum
42. Many electricians wire the lights and receptacles in a room on different circuits because this ____. a. is required by the NEC b. is required by building codes c. offers the advantage that all power in a room will not go out if the overcurrent protective device trips d. simplifies grounding
c. offers the advantage that all power in a room will not go out if the overcurrent protective device trips
55. Ceiling fans must be specially supported for all of the following reasons, except for ____. a. weight b. torque (twisting motion, particularly when first starting) c. safe grounding d. vibration
c. safe grounding
13. A light above a workbench is an example of ____. a. general lighting b. accent lighting c. task lighting d. security lighting
c. task lighting
37. Cord-and-plug-connected appliances shall not exceed ____ percent of the branch-circuit rating. a. 50 b. 60 c. 70 d. 80
d. 80
59. In a room that may be used as a home office, you could consider ____. a. using 12 AWG for the home run or even for the entire branch circuit(s) b. wiring in quadplex receptacles instead of duplex receptacles c. using only plug-in strips that are UL listed d. All of the above
d. All of the above
33. All of the following are acceptable disconnecting means for appliances, except for ____. a. a circuit-breaker in sight of the appliance b. a circuit-breaker or switch capable of being locked in the off position c. an attachment cord and plug d. a horsepower-rated switch
d. a horsepower-rated switch
51. All 15- and 20-ampere receptacles installed within 6 ft (1.8 m) of a ____ sink must be GFCI protected. a. wet bar b. laundry c. utility d. all of the above
d. all of the above
66. Which of the following rules apply to coaxial cable installations under Article 820? a. The outer shield of the coaxial cable must be grounded close to its point of entry into the building. b. Coaxial cables shall not be run in the same conduits or box with electric light and power conductors. c. Do not support coaxial cables from raceways that contain electrical light and power conductors. d. all of the above
d. all of the above
71. GFCI protection can be provided for convenience receptacles serving kitchen countertop areas by ____. a. GFCI circuit breakers b. installing a GFCI-protected receptacle at each location c. installing a single feed-through type GFCI receptacle to protect downstream receptacles d. all of the above
d. all of the above
27. Residential wiring plans generally show lighting and receptacle outlet locations but not circuits. The electrician should design the installation with which of the following in mind? a. economy - minimizing the number and length of circuits b. convenience for the homeowner or other user c. National Electrical Code requirements d. all of these
d. all of these
10. Ceiling fan speed can be controlled by ____. a. pull chain on the fan b. speed control mounted in a wall box c. remote control similar to TV/VCR type d. any of the above
d. any of the above
12. A "unit switch" used as a disconnecting means for an appliance shall ____. a. be horsepower-rated b. interrupt all ungrounded circuit conductors c. have a NEMA 3R enclosure when installed outdoors d. both a and b
d. both a and b
4. All 125-volt, 15- and 20-ampere receptacles installed to serve a kitchen countertop are required ____. a. to be supplied by at least two 20-ampere small appliance circuits b. to have GFCI protection for personnel c. to be installed within 24 inches of the sink
d. both a and b
47. Which of the following is required in order to dim fluorescent fixtures? a. fluorescent dimmer b. dimming ballasts c. oversized neutral in the branch-circuit d. both a and b
d. both a and b
63. Receptacles installed within 6 feet of a wet bar are required ____. a. to have GFCI protection b. to not be installed face up in countertops unless listed for such installations c. to be installed at least 6 inches above the countertop d. both a and b
d. both a and b
35. Most duplex receptacles can be changed into "split-wired" receptacles by ____. a. adding an additional wire b. splitting the wires c. diverting a circuit d. breaking off the small metal tab on the terminals
d. breaking off the small metal tab on the terminals
5. NEC 422.60(A) requires that an appliance nameplate show ____. a. the appliance rating in volts and amperes b. the appliance connected load in volts and watts c. the appliance branch circuit conductor size
d. either a or b
67. The NEC allows what maximum number of receptacle outlets to be connected on a 120-volt residential lighting or small-appliance branch circuit? a. eight b. ten c. thirteen d. unlimited
d. unlimited
73. Install luminaires listed for ____ locations if they will be subject to shower spray. a. damp b. humid c. dry d. wet
d. wet
74. A light dimmer ____ be used as a speed control for a ceiling fan or other motor. should or shouldn't?
shouldn't