Question 1

Switching voltage surges are usually limited to three times normal voltage.

Accepted Answer

A) True 
 B)False  True

Question 2

____ is the current-limiting characteristic of a transformer and is expressed as a percent.

Accepted Answer

A)   Capacitance
B)   Impedance
C)   Ampacity
D)   Rectification B

Question 3

Adding a(n) ____________________ to the nonautomatic circuit breaker, by using a bimetallic element in each pole of the breaker, provides automatic tripping.

Accepted Answer

thermal trip unit

Question 4

Peak let-thru current (Ip) and ampere squared seconds (I2t) are two measures for the degree of ____ provided by a fuse.

Accepted Answer

A)   current limitation
B)   time delay
C)   circuit isolation
D)   rectification

Question 5

The main purpose of a ground fault circuit interrupter (GFCI) is to ____.

Accepted Answer

A)   determine the interrupting capacity
B)   calculate the available current
C)   protect a person from electrical shock
D)   gauge the ambient temperature

Question 6

____________________ fuses are used today in almost all fuse applications.

Accepted Answer

The answer of ____________________ fuses are used today in almost...

Question 7

The 120 VAC circuit is normally protected by a single fuse or circuit breaker.

Accepted Answer

A) True 
 B)False

Question 8

All protective devices have a published ____________________, which is defined as the highest current at rated voltage that a device can safely interrupt.

Accepted Answer

The answer of All protective devices have a published ____________________,...

Question 9

The typical fuse consists of an element surrounded by a filler and enclosed by the fuse body. The element is a calibrated ____.

Accepted Answer

A)   insulator
B)   transistor
C)   conductor
D)   capacitor

Question 10

By programming a motor-protective relay unit with the motor's electrical characteristics, the unit's algorithm will automatically tailor the optimal protection curve to the motor being monitored.

Accepted Answer