Question 1

Which of the following conductors are permitted to be used for the push-in method of attaching conductors to a device?

Accepted Answer

The push-in method of attaching conductors to a device is typically designed for use with solid conductors, not stranded or aluminum conductors. 14 AWG solid copper is the correct choice because it is a solid conductor, which is suitable for push-in terminals. Stranded conductors, aluminum, and copper-clad aluminum are not recommended for push-in connections due to their physical properties and the potential for a less secure connection.

Question 2

All metal device boxes need to have the circuit equipment-grounding conductor(s) connected to it with a 10-32 green grounding screw.

Accepted Answer

This is true according to the National Electrical Code (NEC) requirements for equipment grounding.

Question 3

A TVSS device works by __________ the high-surge voltage to a level that a piece of equipment like a computer can withstand.

Accepted Answer

A TVSS (Transient Voltage Surge Suppressor) device works by clamping the high-surge voltage to a safe level that equipment like a computer can handle. This means that it limits the maximum voltage that can reach the equipment, protecting it from damage due to power surges or spikes.

Question 4

An equipment-grounding conductor may not be __________.

Accepted Answer

An equipment-grounding conductor may not be green with white stripes. The standard colors for an equipment-grounding conductor are bare, green, or green with yellow stripes. Green with white stripes is not recognized for this purpose.

Question 5

The most common receptacle type used in residential wiring is the single receptacle.

Accepted Answer

Duplex receptacle

Question 6

In all areas specified in Section 210.52, all nonlocking type 125- and 250-volt, 15- and 20-ampere receptacles must be tamper-resistant.(General Rule)

Accepted Answer

The statement accurately reflects the requirement specified in the NEC Section 210.52. Nonlocking type 125- and 250-volt, 15- and 20-ampere receptacles must be tamper-resistant in all areas mentioned.

Question 7

If a white conductor in a Type NM cable is connected to a traveler terminal on a three-way switch, it does not have to be reidentified because it is not "hot" all the time.

Accepted Answer

A white conductor in a cable must always be reidentified whenever it is used as a "hot" conductor, no matter for how long it will be "hot."

Question 8

Section 210.12(A) in the NEC requires all of the 15- and 20-ampere, 120-volt branch circuits installed in dwelling unit kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sun rooms, recreation rooms, closets, hallways, laundry areas, or similar rooms or areas to be AFCI protected.

Accepted Answer

Section 210.12(A) in the NEC requires all of the 15- and 20-ampere, 120-volt branch circuits installed in dwelling unit kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sun rooms, recreation rooms, closets, hallways, laundry areas, or similar rooms or areas to be AFCI protected.

Question 9

On a 20-ampere rated branch circuit, which of the following types of receptacles may not be used?

Accepted Answer

Only 20-ampere single receptacles and 20-ampere duplex receptacles may be used on a 20-ampere rated branch circuit. 15-ampere receptacles are not rated for the higher amperage and could result in overheating and potential hazards.

Question 10

When self-grounding receptacles are used with nonmetallic device boxes, there is no need to attach the circuit grounding conductor to the green screw on the receptacle.

Accepted Answer

Self-grounding receptacles are used with metal boxes.

Question 11

Section 404.10(B) specifies that screws used for attaching a switch to an electrical box must be sheet metal screws with a thread that matches the thread gage or size of the screw holes in the box.

Accepted Answer

Must be machine screws

Question 12

When a duplex receptacle is installed horizontally, it is recommended that the __________ slot be located on top.

Accepted Answer

When a duplex receptacle is installed horizontally, it is recommended that the grounded slot (the wider one) be located on top. This is because most electrical plugs have a grounding prong, which is larger than the other two prongs, and will fit securely in the grounded slot. Placing the ungrounded slot on top could allow for the possibility of an object or wire accidentally becoming stuck in the slot, which could cause a potential electrical hazard.

Question 13

Which of the following determine the effect electrical shock has on the body?

Accepted Answer

All of the above factors determine the effect electrical shock has on the body. The amount of current flowing through the body, the path the current takes, and the length of time the current flows through the body all play a significant role in the severity of electrical injuries. Electrical current can cause a variety of injuries such as burns, muscular contractions, heart disturbances, and even death. Therefore, all of these factors need to be considered to determine the potential impact of electrical shock on the body.

Question 14

A __________ device operates by monitoring the current flow on both the ungrounded "hot" conductor and the grounded conductor.

Accepted Answer

A device that monitors the current flow on both the ungrounded "hot" conductor and the grounded conductor is a ground fault circuit interrupter (GFCI). It is designed to quickly shut off power when it detects an imbalance between the two currents, which could indicate a dangerous ground fault. TVSS (transient voltage surge suppressor) protects against voltage spikes and surges, circuit breakers protect against overcurrent, and fuses protect against overloading.

Question 15

A Class A GFCI device is designed to trip when fault current levels are _____ milliamps or more and not to trip when the fault current is less than _____ milliamps.

Accepted Answer

A Class A GFCI device is designed to trip when fault current levels reach 6 milliamps or more and not to trip when the fault current is less than 4 milliamps.

Question 16

A __________ switch would be used to control two lights from one location.

Accepted Answer

A single-pole switch is used to control a light (or lights) from one location. This is the most common type of switch found in homes for basic lighting control.

Question 17

Many of the appliances used in today's homes contain sensitive electronic circuitry, circuit boards, or microprocessors and these components are susceptible to transient voltages, also known as __________ or voltage spikes.

Accepted Answer

Transient voltages are also known as voltage surges, and these can cause damage to sensitive electronic components. Voltage drops and dips refer to decreases in voltage, and voltage peaks are not a commonly used term.

Question 18

A feed-through GFCI receptacle can provide GFCI protection for regular receptacles installed "downstream" on the same branch circuit.

Accepted Answer

A feed-through GFCI receptacle is designed to provide GFCI protection for not only the receptacle itself, but also for any other receptacles downstream on the same circuit.

Question 19

A multiple receptacle has more than __________ contact device(s) on the same yoke.

Accepted Answer

A multiple receptacle has two or more contact devices on the same yoke. Option A is incorrect because a single receptacle has one contact device. Option C and D are incorrect because the maximum number of contact devices allowed on a yoke is two.

Question 20

A GFCI device provides protection against __________.

Accepted Answer

GFCI stands for Ground Fault Circuit Interrupter. It provides protection against ground faults, which occur when a hot wire comes into contact with a grounded surface, such as metal or water. This can create a dangerous electrical shock hazard. GFCIs monitor the amount of current flowing out and returning to the circuit and will quickly shut off power to the circuit if it detects a difference. GFCIs do not provide protection against short circuits or overcurrents.

Quiz 18: Device Installation