Question 1

All ____________________ boxes must be accessible after they are installed.

Accepted Answer

The answer of All ____________________ boxes must be accessible after...

Question 2

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

Accepted Answer

GFCI circuit breakers are identifiable by the "push-to-test" button and the length of white wire attached to them, which is the neutral wire necessary for their operation.

Question 3

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

Accepted Answer

A double-pole switch is necessary to handle the high voltage of a 240-volt circuit and allow for control from one location. Single-pole switches are only suitable for lower voltage circuits, while occupancy and combination switches serve different purposes.

Question 4

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

Accepted Answer

Circuit breakers are the most commonly used type of overcurrent protection device in residential wiring because they are durable, easy to reset, and do not require replacement every time they are activated. Edison base fuses, plug fuses, and cartridge fuses are also used in some residential applications, but not as frequently as circuit breakers.

Question 5

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

Accepted Answer

Type S plug fuses are designed to be non-tamperable, meaning they cannot be easily removed or replaced, making them a safe and reliable choice for new installations. Edison base fuses are older technology, and cartridge fuses can be tampered with if not secured properly. Regular plug fuses, while inexpensive, can also be tampered with and are not recommended for new installations.

Question 6

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

Accepted Answer

Tamper-resistant receptacles have been required by the National Electrical Code since 2008 to prevent children from accidentally inserting foreign objects into the slots and getting electrocuted. Terminated, color-coded, and self-grounding are important aspects of wiring and electrical systems, but they are not specifically required for standard receptacles in homes.

Question 7

Type __________ cable is used for underground service entrance installations.

Accepted Answer

The USE (Underground Service Entrance) cable is specifically designed for underground service entrance installations, making it the best choice for this application.

Question 8

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

Accepted Answer

Double pole switches are typically marked with ON/OFF because they control the power to two different circuits or devices, whereas three way and four way switches control a single circuit or device and do not necessarily have markings for ON/OFF.

Question 9

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

Accepted Answer

CO/ALR marked on a receptacle indicates that it is suitable for use with copper, copper-clad aluminum, and aluminum conductors.

Question 10

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

Accepted Answer

NEC requires rigid metal conduit to be supported within 3 feet of each box and then no more than every 10 feet thereafter.

Question 11

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.

Accepted Answer

The attachment plug is specifically designed to be inserted into a receptacle to establish a connection between the conductors of the attached flexible cord and the conductors connected to the receptacle. The other choices (outlet, fuse, connector) do not specifically refer to the device that performs this function.

Question 12

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

Accepted Answer

Romex is a brand name for nonmetallic sheathed cable (NM cable). It consists of a plastic jacket that surrounds two or more insulated wires, typically used for residential wiring applications.

Question 13

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

Accepted Answer

A cable is a factory assembly of two or more conductors that has an overall outer sheathing which can be nonmetallic or metallic. Therefore, option C is the correct answer. Option A (wire) refers to a single conductor, while option B (conductor) is a general term for any material that can conduct electricity. Option D is incorrect as one of the options must be the correct answer.

Question 14

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

Accepted Answer

"CU" is the chemical symbol for copper, indicating that the switching device is designed to be used with copper wire only. Copper clad aluminum wire or pure aluminum wire should not be used with this device.

Question 15

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

Accepted Answer

This is known as "ganging" electrical device boxes together.

Question 16

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.

Accepted Answer

NEMA 3R enclosures are designed for outdoor applications where the enclosure will be exposed to rain or sleet. This type of enclosure will also provide protection from windblown dust and dirt. NEMA 1, 2, and 12 enclosures do not provide the same level of protection from the elements as a NEMA 3R enclosure.

Question 17

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

Accepted Answer

The answer of The ____________________ of a conductor refers to...

Question 18

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

Accepted Answer

The brass terminal on a duplex receptacle is the terminal for the ungrounded 'hot' conductor.

Question 19

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 __________.

Accepted Answer

A knockout is a small section of metal on the side or back of an electrical box that can be easily removed with a screwdriver or pliers to allow a cable or conduit to be inserted into the box. It is designed to be easily removed and is often pre-marked for different sizes of conduits or cables. Mounting brackets are used to secure the electrical box to a wall or other surface. Cable clamps are used to secure the cables inside the box, and plaster ears are used to secure the box to a stud or other vertical surface during installation.

Question 20

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.

Accepted Answer

A loadcenter (also known as a breaker box or panelboard) contains the main disconnecting means and circuit breakers/fuses for protecting circuits and equipment in a residential service entrance. A safety switch is a type of disconnect switch used to isolate power from a particular piece of equipment. A sub-panel is an additional electrical panel used to create extra circuits and can be fed from a main loadcenter. A meter socket is a device used to connect a utility meter to a building's electrical system.

Quiz 2: Hardware and Materials Used in Residential Wiring