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1. Cartridge fuses used for branch circuit protection must be marked with the ampere rating, voltage rating, and the ________.

date manufactured

dimensions

interrupting rating

expiration

Question 1 of 15

2. Which type of GFCI receptacle offers protection only at the point of installation?

Nonfeed-through

Solid-state

Feed-through

Unlisted

Question 2 of 15

3. The two most common types of overcurrent protective devices are ________.

Edison-base fuses and time-delay devices

heaters and blowers

safety switches and load centers

circuit breakers and fuses

Question 3 of 15

4. The interrupting rating of an FH-type circuit breaker is ________.

65,000A

5,000A

30,000A

10,000A

Question 4 of 15

5. NEC Article 240 covers which of the following?

Nontime-delay fuses

Overcurrent protection

Ampere rating

Plug fuses

Question 5 of 15

6. Which of the following types of drawings helps when sizing fuses for a given application?

Single-line schematic

Building elevation drawing

Large-scale detail

Floor plan

Question 6 of 15

7. The normal current rating of a circuit breaker is located ________.

on the bottom

on the side

in the panelbox

on the handle

Question 7 of 15

8. Circuit breakers are grouped for identification according to ________.

given current ranges

line and load terminals

solid-state circuitry

normal ambient temperatures

Question 8 of 15

9. Which of the following is defined by UL as a device that trips when a fault current to ground is 6mA or more?

Class R

Class A

Class H

Class B

Question 9 of 15

10. What name is given to the time-current relationship among a number of overcurrent devices connected in series?

Switched

Dual-element

Coordination

Nonrenewable

Question 10 of 15

11. What color is printed on the labels of standard interrupting capacity circuit breakers?

Red

Blue

White

Black

Question 11 of 15

12. A current-limiting circuit breaker performs in a manner similar to conventional thermomagnetic circuit breakers at currents below a threshold of about ________.

700A

1,000A

800A

600A

Question 12 of 15

13. Why are single-element fuses particularly suited for the protection of circuit breakers with low interrupting ratings?

They have a low speed of response to short circuit currents.

They have a high speed of response to overcurrents.

They can be applied in circuits subject to temporary motor overload.

They can be used in circuits other than motor branch circuits and feeders, such as lighting circuits.

Question 13 of 15

14. In residential applications, the available ground fault circuit current is seldom higher than ________.

15,000A

5,000A

10,000A

65,000A

Question 14 of 15

15. The organization(s) that test and list circuit breakers is/are ________.

CSA and UL

OSHA and NEMA

UL and NEMA

IEEE

Question 15 of 15

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