Deck 2: Hardware and Materials Used in Residential Wiring

Question 1

AHJs usually base their approval of electrical equipment on whether it is listed and labeled by a nationally recognized testing laboratory (NRTL).

Answer 1

True

Question 2

On a GFCI receptacle, the incoming power is connected to the line terminals.

Answer 2

True

Question 3

The __________ is a scale of specified diameters and cross sections for wire sizing and is the standard wire sizing scale for the United States.

A) American Wire Gauge
B) Metric System
C) United States Measuring System
D) None of the above

Answer 3

A

Question 4

A low resistance path, which results in a high value of current that flows around, rather than through, a circuit is called a(n) __________ circuit.

A) open
B) short
C) grounded
D) grounding

Question 5

The National Electrical Code requires Type NM cable to be secured no more than __________ inches from single-gang nonmetallic device boxes.

A) 6
B) 8
C) 10
D) 12

Question 6

Which of the following conductors is the largest?

A) 8 AWG
B) 10 AWG
C) 12 AWG
D) 14 AWG

Question 7

An accidental connection of a "hot" conductor and a grounded piece of equipment or the grounded conductor is called a(n) __________.

A) open circuit
B) grounding conductor
C) ground fault
D) complete circuit

Question 8

It is the __________ who has the job of approving the electrical materials used for a residential electrical installation.

A) electrician
B) foreman
C) architect
D) authority having jurisdiction

Question 9

On a duplex receptacle, the silver screw is used to terminate the white grounded conductor.

Question 10

When nonmetallic device boxes that are 2-gang or more are used, the installed Type NM cable must be secured no more than __________ inches from the box.

A) 8
B) 10
C) 12
D) 18

Question 11

The __________ circuit conductor is used as the grounded conductor and returns current from the load back to the source.

A) black
B) white
C) red
D) green

Question 12

Staples are the most common item used to secure and support cables in residential wiring.

Question 13

Boxes with mounting ears are typically called new work boxes; boxes without mounting ears are referred to as old work boxes.

Question 14

In the AWG system: the smaller the number, the smaller the conductor; and the larger the number, the larger the conductor.

Question 15

A wirenut is the most common wire connector used by electricians to splice together two or more conductors.

Question 16

When using aluminum conductors, __________ size conductor must be used to carry the same amount of current as a copper conductor.

A) a smaller
B) the same
C) a larger
D) the same or larger

Question 17

The __________ is an organization that develops electrical equipment standards that all member groups follow when designing and producing electrical equipment.

A) Underwriters Laboratories
B) Canadian Standards Association
C) National Electrical Manufacturers Association
D) National Electrical Code

Question 18

Schedule 40 rigid polyvinyl chloride conduit (Type PVC) conduit has a smaller inside diameter than Schedule 80 rigid nonmetallic PVC conduit.

Question 19

Type __________ cable is used for underground installations of branch and feeder circuits.

A) NM
B) NM-B
C) SE
D) None of the above

Question 20

Manufacturers of nonmetallic sheathed cable color code a 12/2 Type NM cable with the color orange.

Question 21

All ____________________ boxes must be accessible after they are installed.

Question 22

A GFCI circuit breaker is easily recognizable by the 'push-to-test' button and the __________.

A) yellow body
B) length of white wire attached to it
C) larger operating handle
D) smaller body size

Question 23

A switch that is used on 240-volt circuits to control a load from one location is called a __________ switch.

A) single-pole
B) double-pole
C) occupancy
D) combination

Question 24

__________ are the most often used type of overcurrent protection device used in residential wiring.

A) Circuit breakers
B) Edison base fuses
C) Plug fuses
D) Cartridge fuses

Question 25

__________ plug fuses are considered non-tamperable and are used in new installations requiring plug fuses.

A) Edison base
B) Type S
C) Cartridge
D) Plug

Question 26

Almost all 15- or 20-amp, 125-volt receptacles in a house must be __________.

A) tamper-resistant
B) terminated
C) color-coded
D) self-grounding

Question 27

Type __________ cable is used for underground service entrance installations.

A) SE
B) UF
C) USE
D) NM-B

Question 28

Which of the following switches has ON/OFF marked on the switch handle?

A) Three-way
B) Double-pole
C) Four-way
D) None of the above

Question 29

CO/ALR marked on a receptacle indicates that __________ conductors may be terminated to it.

A) copper
B) copper-clad aluminum
C) aluminum
D) All of the above
E) A and B only

Question 30

The NEC requires rigid metal conduit to be supported within __________ feet of each box and then no more than every __________ feet thereafter. (general rule)

A) 3, 8
B) 5, 10
C) 2, 10
D) 3, 10

Question 31

The ______ is the device that is inserted into a receptacle to establish a connection between the conductors of the attached flexible cord and the conductors connected to the receptacle.

A) outlet
B) fuse
C) connector
D) attachment plug

Question 32

Romex is a trade name used by electricians to refer to __________.

A) armored cable
B) metal clad cable
C) underground feeder cable
D) nonmetallic sheathed cable

Question 33

A _____ is described as a factory assembly of two or more conductors that has an overall outer sheathing that can be nonmetallic or metallic.

A) wire
B) conductor
C) cable
D) None of the above

Question 34

If a switching device has the marking CU ONLY on it, an electrician can use only __________ wire with the device.

A) copper
B) copper clad aluminum
C) aluminum
D) any of the above

Question 35

When two or more electrical device boxes are joined together for the purpose of holding more than one device it is called __________.

A) fitting
B) ganging
C) sticking
D) boxing

Question 36

A weatherproof enclosure designed to give protection from falling dirt, rain, snow, sleet, and windblown dust is classified as a _____ enclosure and will need to be installed for outside appliciations.

A) NEMA 1
B) NEMA 2
C) NEMA 3R
D) NEMA 12

Question 37

The ____________________ of a conductor refers to its ability to carry current.

Question 38

The ungrounded 'hot' conductor is terminated to the __________ terminal on a duplex receptacle.

A) brass
B) silver
C) green
D) black

Question 39

A part of an electrical box that is designed to be removed so that a cable or raceway can be connected to the box is called a __________.

A) knockout
B) mounting bracket
C) cable clamp
D) plaster ear

Question 40

A _____ is a type of electrical panel that contains the main disconnecting means for the residential service entrance as well as the fuses or circuit breakers used to protect circuits and equipment like electric water heaters, ranges, dryers, and lighting.

A) safety switch
B) loadcenter
C) sub-panel
D) meter socket

Question 41

In residential wiring, the NEC requires a ____________________-amp circuit breaker or fuse to be used with 12 AWG copper conductors.

Question 42

A single-pole breaker is used on a circuit voltage of ____________________ volts and a two-pole breaker is used on a circuit voltage of ____________________ volts in residential wiring.

Question 43

Electricians often refer to Type AC cable as ____________________ cable.

Question 44

In certain locations in the United States, the AHJ may not allow nonmetallic sheathed cable in residential construction. The alternative wiring method most often used is _____________.

Question 45

A(n) ____________________ is a point on the wiring system at which current is taken to supply equipment.

Question 46

Explain the purpose of an antioxidant in electrical wiring.

Question 47

_________________________ plug fuses cannot be used in new installations.

Question 48

Explain when three-way switches are used in a residential lighting circuit.

Question 49

____________________ is a measure of how much a fastener is being tightened and is measured in foot-pounds or inch-pounds.

Question 50

A ____________________ is an overcurrent device that opens a circuit when a fusible link is melted away by the extreme heat caused by an overcurrent.

Question 51

____________________ devices are used when more than one device is needed at one location.

Question 52

Explain how a product gets listed.