An automatic transfer switch will switch over when the voltage falls below __% of rated and will return automatically upon a resumption of service.

An automatic transfer switch will switch over when the voltage falls below __% of rated and will return automatically upon a resumption of service.

a. 30%
b. 70%
c. 60%
d. 40%
e. 80%




Answer: B

___ are used to select alternate circuits

___ are used to select alternate circuits

a. Switchboards
b. Feeders
c. Branch circuits
d. Transfer Switches
e. Tertiary circuits




Answer: D

The branch circuit amperage capacity may range from __ to __ Amperes?

The branch circuit amperage capacity may range from __ to __ Amperes?

a. 5 to 300
b. 8 to 450
c. 10 to 600
d. 15 to 700
e. 20 to 800





Answer: D

Circuits which extend beyond the final overcurrent device are termed?

Circuits which extend beyond the final overcurrent device are termed?

a. Secondary circuits
b. Primary circuits
c. Branch circuits
d. Trunk circuits
e. Tertiary circuits




Answer: C

Beyond the first protective device the __ form the distribution network to the last protective devices which protect the branch circuits.

Beyond the first protective device the __ form the distribution network to the last protective devices which protect the branch circuits.

a. Switchboards
b. Transformers
c. Hysteresis
d. Feeders





Answer: D

___ provides an enclosure for the distribution and control of the feeders as well as switching and protection of the service.

___ provides an enclosure for the distribution and control of the feeders as well as switching and protection of the service.

a. Transformer cabinets
b. Switchboard
c. Feeder board
d. All of the above





Answer: B

Which diagram illustrate the locations and markings of each terminal and the interconnection that is required?

Which diagram illustrate the locations and markings of each terminal and the interconnection that is required?

a. Riser diagram
b. One-line diagram
c. Elementary diagram
d. Connection diagram
e. Terminal and connection diagram




Answer: E

Which diagram indicates by means of single lines and simplified symbols the distribution of electrical systems in a multistoried structure?

Which diagram indicates by means of single lines and simplified symbols the distribution of electrical systems in a multistoried structure?

a. Riser diagram
b. One-line diagram
c. Elementary diagram
d. Connection diagram
e. Terminal and connection diagram

Answer: A

Which diagram displays the relative physical arrangement of components, including all wiring and connections?

Which diagram displays the relative physical arrangement of components, including all wiring and connections?

a. Riser diagram
b. One-line diagram
c. Elementary diagram
d. Connection diagram
e. Terminal and connection diagram




Answer: D

The actual ratings on devices selected for nominal system supplies are about __ lower, to account for any voltage drop of the supply system.

The actual ratings on devices selected for nominal system supplies are about __ lower, to account for any voltage drop of the supply system.

a. 1%
b. 2%
c. 3%
d. 4%
e. 5%






Answer: D

A 120 V system is best described as a:

A 120 V system is best described as a:

a. Three phase four-wire system
b. One phase three-wire system
c. Three phase three-wire system
d. One phase two-wire system
e. Two phase three-wire system





Answer: D

A 120/240 V system is best described as a:

A 120/240 V system is best described as a:

a. Three phase four-wire system
b. One phase three-wire system
c. Three phase three-wire system
d. One phase four-wire system
e. Two phase three-wire system






Answer: B

The utility's responsibility will not go beyond the

The utility's responsibility will not go beyond the

a) first branch line
b) first overcurrent device
c) primary transformer
d) first trunk circuit
e) motor control centre





Answer: B

A prime factor in determining the voltage to be used in a circuit is

A prime factor in determining the voltage to be used in a circuit is

a) transformer capacity
b) peak demands
c) degree of access to equipment
d) the number of motors involved
e) the resistance of the circuit




Answer: C

Choose the statement that is FALSE. In an electrical system the neutral wire:

Choose the statement that is FALSE. In an electrical system the neutral wire:

a. Is connected to earth at one or more points
b. Is not attached to a circuit breaker or fuse
c. Is called the "identified" conductor
d. Carries current in a three-wire system when the loads are balanced.
e. Is white in colour






Answer: D

Low voltage systems may have an actual voltage variation of plus or minus:

Low voltage systems may have an actual voltage variation of plus or minus:

a. 10%
b. 5%
c. 1.5%
d. 7.5%
e. 12.5%





Answer: B

An electrical distribution system is composed of service, feeders and:

An electrical distribution system is composed of service, feeders and:

a. Secondary circuits
b. Primary circuits
c. Branch circuits
d. Trunk circuits
e. Tertiary circuits




Answer: C

Low voltages include all voltages between _____ V.

Low voltages include all voltages between _____ V.

a. 0 and 30
b. 30 and 110
c. 30 and 220
d. 30 and 750
e. 100 and 750





Answer: D

Extra low voltages include all voltages below _____ V.

Extra low voltages include all voltages below _____ V.

a. 30
b. 50
c. 110
d. 220
e. 440




Answer: A

When working with high voltage systems, the minimum distance of approach should be not less than:

When working with high voltage systems, the minimum distance of approach should be not less than:

a. 1 m
b. 5 m
c. 2 m
d. 3 m
e. 0.5 m




Answer: C