Deck 11: Wiring Applications

Question 1

A common design practice is to allow a circuit breaker to carry only ____ percent of its continuous current rating.

A) 60
B) 70
C) 80
D) 90

Answer 1

C

Question 2

When calculating the load, it is common practice to start with the branch circuits and combine their loads at each panel.

Answer 2

True

Question 3

A(n) ____ is a place in the wiring system where conductors of opposite polarity make contact.

A) grounded conductor
B) fuse
C) short circuit
D) circuit breaker

Answer 3

C

Question 4

A(n) ____ control permits all of the lights or specific groups of lights to be controlled from one location.

A) residential selector
B) universal selector
C) two-way
D) master selector

Question 5

____ fuses are the type most commonly used in industrial installations.

A) Plug
B) Two-way
C) Replaceable
D) Cartridge

Question 6

A ground-fault circuit interrupter is a device that senses a small imbalance of current between the ungrounded (hot) conductor and the grounded (neutral) conductor.

Question 7

Fuses and circuit breakers have ____ current ratings.

A) two
B) three
C) four
D) five

Question 8

There are three common styles of switches used to control lights including ____.

A) single pole
B) double pole
C) two way
D) grounded

Question 9

To minimize line drop, electrical services should be installed in a(n) ____ location to minimize the distance to the loads.

A) outdoor
B) top floor
C) central
D) remote

Question 10

A demand factor is the ratio of the maximum load used at any one time to the total connected load.

Question 11

At times, lights are controlled by ____ switches and relays.

A) low-voltage
B) inductive
C) high-voltage
D) four-pole

Question 12

A(n) ____ overcurrent device is a fuse or circuit breaker that opens the circuit much more quickly than the ordinary device does.

A) current-limiting
B) voltage-limiting
C) fast-acting
D) grounding

Question 13

One of the rules for residential wiring is to install a 200-ampere, three-wire or larger service for a single-family dwelling.

Question 14

There are ____ general types of circuit breakers.

A) two
B) three
C) four
D) five

Question 15

Most residential installation circuits are protected against overcurrent by 25-ampere or larger fuses or circuit breakers.