Deck 2: Hardware and Materials Used in Residential Wiring

Question 1

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

Answer 1

False
The outside diameters are the same while the inside diameter of schedule 80 is smaller than schedule 40.

Question 2

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 2

A

Question 3

The __________ circuit conductor in a 120-volt residential branch circuit is used as the grounded conductor and returns current from the load back to the source.

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

Answer 3

B

Question 4

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 5

In the American Wire Gauge system: the smaller the number, the smaller the conductor; and the larger the number, the larger the conductor.

Question 6

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

Question 7

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

Question 8

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

Question 9

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 10

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 11

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

Question 12

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 13

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 14

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 15

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 16

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

Question 17

Which of the following conductors is the largest?

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

Question 18

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 19

On a duplex receptacle, the silver screw is used to terminate the white grounded conductor of a 120-volt residential branch circuit.

Question 20

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

Question 21

The ungrounded "hot" conductor of a 120-volt residential branch circuit is terminated to the __________ terminal on a duplex receptacle.

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

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

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 24

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

Question 25

__________ 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 26

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 27

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 28

__________ plug fuses are considered nontamperable and are used in new installations requiring plug fuses.

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

Question 29

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

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

Question 30

All ____________________ boxes must be accessible after they are installed.

Question 31

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 32

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 33

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

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

Question 34

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 35

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 applications.

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

Question 36

Type __________ cable is used for underground service entrance installations.

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

Question 37

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 38

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 39

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 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) load center
C) subpanel
D) meter socket

Question 41

Section __________ states that only qualified electrical testing labs can test, evaluate, and then list electrical products.

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

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 44

Explain how a product gets listed.

Question 45

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

Question 46

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

Question 47

Electricians often refer to Type AC cable as ____________________ cable.

Question 48

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

Question 49

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

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

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

Question 52

_________________________ plug fuses cannot be used in new installations.

Question 53

Explain the purpose of an antioxidant in electrical wiring.