Font size
WorksheetsResidential wiring - Hardware and Material
Total questions: 30
Worksheet time: 15mins
OSHA requires special training and certification before an electrician can use powder-actuated fastening systems.
True
False
If a piece of electrical equipment has a nationally recognized testing laboratory __________ on it, it means that the item has met specific standards and is suitable for its intended purpose.
marking
label
sticker
Either a or b.
The ____________ develops electrical equipment standards that all member manufacturers follow when designing and producing electrical equipment.
NEMA
NFPA
ANSI
NRTL
The NEC requires that a junction box be accessible after installation; therefore, it cannot be buried in a wall or ceiling.
True
False
The ____________ is the system used to size conductors in residential wiring.
international wire sizing charts
American Wire Gauge (AWG)
NEC® wire table
Eye protection is not always required when you are driving nails.
True
False
The article in the NEC® that covers nonmetallic-sheathed cable is Article (a) .
90
220
334
The most common sizes of machine screws used in residential wiring are 6-32, 10-32, and 12-32.
True
False
When ganging metal device boxes together, a (a) is needed to tighten the screws that hold the boxes together.
screwdriver
pair of pliers
nut driver
The (a) is a scale of specified diameters and cross-sections for wire sizing and is the standard wire sizing scale for the United States. (Objective 2-6)
American Wire Gauge
metric system
United States measuring system
none of the choices
An accidental connection between a "hot" ungrounded conductor and a grounded piece of equipment or the grounded conductor is called a(n) (a) .
open circuit
grounding conductor
ground fault
complete circuit
Drive studs are installed using a (a) .
hammer
powder-actuated fastening system
a screwdriver
It is the (a) who has the job of approving the electrical materials used for a residential electrical installation.
electrician
foreman
architect
authority having jurisdiction
When nonmetallic device boxes that are two-gang or more are used, the installed Type NM cable must be supported no more than (a) inches from the box.
6”
8”
12”
3 ft
When using aluminum conductors, (a) size conductor must be used to carry the same amount of current as a copper conductor.
b. the same
The (a) -colored circuit conductor is used as the grounded conductor and returns current from the load back to the source.
black
white
red
green
7. Type ____________ cable is used for underground installations of branch and feeder circuits.
UF (Underground Feeder)
NM (Non-Metallic)
THHN (Thermoplastic High Heat-Resistant Nylon-Coated)
MC (Metal-Clad)
8. Type ____________ cable is used for underground service entrance installations.
USE (Underground Service Entrance)
NM (Nonmetallic Sheathed)
THHN (Thermoplastic High Heat-resistant Nylon-coated)
AC (Armored Cable)
The NEC® requires rigid metal conduit to be supported within _______ feet of each box and then no more than every _______ feet thereafter.
3,8
5, 10
2, 10
3, 10
10. The ungrounded "hot" conductor is terminated to the ____________-colored terminal on a receptacle.
brass
silver
green
black
A switch used on 240-volt circuits to control a load from one location is called a ________________ switch.
single-pole
double-pole
occupancy
combination
Which of the following switches has "ON/OFF" marked on the switch handle?
three-way
double-pole
four-way
none of the choices
______________ are the most commonly used type of overcurrent protection device in residential wiring.
Circuit breakers
Edison base plug fuses
Plug fuses
Cartridge fuses
(a) fuses are considered non-tamperable and are used in new installations requiring fuses.
Edison base plug
Type S plug
Cartridge
Plug
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
mounting bracket
cable clamp
plaster ear
When two or more electrical device boxes are joined together to hold more than one device, it is called _____________________.
ganging
splicing
looping
branching
17. All _________________ boxes must be accessible after installation.
junction
storage
safety
supply
In residential wiring, the NEC® requires a ______________-amp circuit breaker or fuse to be used with 12 AWG copper conductors.
20
15
25
30
A ____________________ is an overcurrent device that opens a circuit when a fusible link melts due to the extreme heat caused by an overcurrent.
fuse
circuit breaker
transformer
relay
20. (a) fuses cannot be used in new installations.
Edison base plug
Type S plug
Cartridge
Plug
