Question 1

The low-voltage relay is available in mounting styles.

Accepted Answer

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

Question 2

Give an overview of how a relay-based low-voltage remote-control system operates.

Accepted Answer

A low-voltage remote-control wiring syst...

Question 3

The switch used in the low-voltage remote-control system is a normally open, , momentary contact switch.

Accepted Answer

A)  double-pole, double-throw
B)  single-pole, double-throw
C)  single-pole, single-throw
D)  double-pole, single-throw

Question 4

To install color-coded cables correctly throughout an entire installation, the wires are connected to the , switches, master controls, and panel, like color to like color.

Accepted Answer

A)  conductor
B)  relays
C)  circuit
D)  barrier

Question 5

In a Class 2 circuit, because the power source of the circuit is limited, overcurrent protection is required.

Accepted Answer

A)  fuse-based
B)  circuit-breaker-based
C)  no
D)  minimum

Question 6

The is used in an installation where several relays are mounted in one enclosure.

Accepted Answer

A)  gasket relay
B)  double-throw relay
C)  plug-in relay
D)  standard relay

Question 7

NEC 725.136(A)  Class 2 circuits in the same raceway or cable as the wiring for light and power.

Accepted Answer

A)  limits the number of
B)  limits the voltage of
C)  prohibits
D)  mandates C

Question 8

When are low-voltage remote-control systems advantageous?

Accepted Answer

A method known as low-voltage remote con...

Question 9

To simplify connections, the conductor color-coding combinations are red-black-white, red-black-yellow-white, red- black-yellow plus an 18 AWG common , red-black-blue-white, and red-black-yellow-blue-white.

Accepted Answer

A)  orange
B)  white
C)  blue
D)  green

Question 10

What size knockout openings can relays be mounted through? What advantage does the plug-in relay have?

Accepted Answer

One style of relay is designed to mount ...

Question 11

Give one advantage and one disadvantage to installing low-voltage wiring in a raceway.

Accepted Answer

Although the NEC does not require that the low-voltage wiring be installed in a raceway, the Specifications for the Commercial Building do contain this requirement.The advantage of using a raceway for the installation is that it provides a means for making future additions at a minimum cost.A disadvantage of this approach is the initial higher construction cost.

Question 12

The switch used in the low-voltage remote-control system is approximately the size of a standard single-pole switch.

Accepted Answer

A)  one-sixth
B)  one-fourth
C)  one-third
D)  one-half

Question 13

Most low-voltage, remote-control systems are wired with AWG conductors.

Accepted Answer

A)  10
B)  14
C)  20
D)  32 C

Question 14

Switches are available in up to -switch combinations with features such as pilot light, lighted toggle, and being key-operated.

Accepted Answer

A)  2
B)  4
C)  8
D)  10

Question 15

identifying the switch's functions can be prepared and inserted in the switch cover.

Accepted Answer

A)  Microchips
B)  Directory strips
C)  LEDs
D)  Relays

Question 16

The principle of operation of a master control with rectifiers is based on the fact that a rectifier permits current in direction(s) .

Accepted Answer

A)  only one
B)  two
C)  at least three
D)  all

Question 17

If control requirements are very complex or extensive, a can be installed.

Accepted Answer

A)  master sequencer
B)  transistor
C)  conventional switch
D)  double relay

Question 18

A low-voltage remote-control wiring system is operated.

Accepted Answer

A)  resistor
B)  capacitor
C)  transistor
D)  relay

Question 19

What happens to a transformer in the case of an overload?

Accepted Answer

The circuit transformer is designed so t...

Question 20

Larger conductors should be used for long runs to minimize the .

Accepted Answer

A)  current
B)  voltage drop
C)  transformer ratio
D)  interrupt rating

Exam 20: Low-Voltage Remote-Control

The low-voltage relay is available in mounting styles.

Correct Answer
verified

Give an overview of how a relay-based low-voltage remote-control system operates.

Correct Answer
verified
A low-voltage remote-control wiring syst...
View Answer

The switch used in the low-voltage remote-control system is a normally open, , momentary contact switch.

Correct Answer
verified

To install color-coded cables correctly throughout an entire installation, the wires are connected to the , switches, master controls, and panel, like color to like color.

Correct Answer
verified

In a Class 2 circuit, because the power source of the circuit is limited, overcurrent protection is required.

Correct Answer
verified

The is used in an installation where several relays are mounted in one enclosure.

Correct Answer
verified

NEC 725.136(A) Class 2 circuits in the same raceway or cable as the wiring for light and power.

Correct Answer
verified
C

When are low-voltage remote-control systems advantageous?

Correct Answer
verified
A method known as low-voltage remote con...
View Answer

To simplify connections, the conductor color-coding combinations are red-black-white, red-black-yellow-white, red- black-yellow plus an 18 AWG common , red-black-blue-white, and red-black-yellow-blue-white.

Correct Answer
verified

What size knockout openings can relays be mounted through? What advantage does the plug-in relay have?

Correct Answer
verified
One style of relay is designed to mount ...
View Answer

Give one advantage and one disadvantage to installing low-voltage wiring in a raceway.

The switch used in the low-voltage remote-control system is approximately the size of a standard single-pole switch.

Correct Answer
verified

Most low-voltage, remote-control systems are wired with AWG conductors.

Correct Answer
verified
C

Switches are available in up to -switch combinations with features such as pilot light, lighted toggle, and being key-operated.

Correct Answer
verified

identifying the switch's functions can be prepared and inserted in the switch cover.

Correct Answer
verified

The principle of operation of a master control with rectifiers is based on the fact that a rectifier permits current in direction(s) .

Correct Answer
verified

If control requirements are very complex or extensive, a can be installed.

Correct Answer
verified

A low-voltage remote-control wiring system is operated.

Correct Answer
verified

What happens to a transformer in the case of an overload?

Correct Answer
verified
The circuit transformer is designed so t...
View Answer

Larger conductors should be used for long runs to minimize the .

Correct Answer
verified

Exam 20: Low-Voltage Remote-Control

The low-voltage relay is available in mounting styles.

Correct AnswerverifiedShow Answer

Give an overview of how a relay-based low-voltage remote-control system operates.

Correct AnswerverifiedA low-voltage remote-control wiring syst...View AnswerShow Answer

The switch used in the low-voltage remote-control system is a normally open, , momentary contact switch.

Correct AnswerverifiedShow Answer

To install color-coded cables correctly throughout an entire installation, the wires are connected to the , switches, master controls, and panel, like color to like color.

Correct AnswerverifiedShow Answer

In a Class 2 circuit, because the power source of the circuit is limited, overcurrent protection is required.

Correct AnswerverifiedShow Answer

The is used in an installation where several relays are mounted in one enclosure.

Correct AnswerverifiedShow Answer

NEC 725.136(A) Class 2 circuits in the same raceway or cable as the wiring for light and power.

Correct AnswerverifiedC

When are low-voltage remote-control systems advantageous?

Correct AnswerverifiedA method known as low-voltage remote con...View AnswerShow Answer

To simplify connections, the conductor color-coding combinations are red-black-white, red-black-yellow-white, red- black-yellow plus an 18 AWG common , red-black-blue-white, and red-black-yellow-blue-white.

Correct AnswerverifiedShow Answer

What size knockout openings can relays be mounted through? What advantage does the plug-in relay have?

Correct AnswerverifiedOne style of relay is designed to mount ...View AnswerShow Answer

Give one advantage and one disadvantage to installing low-voltage wiring in a raceway.

The switch used in the low-voltage remote-control system is approximately the size of a standard single-pole switch.

Correct AnswerverifiedShow Answer

Most low-voltage, remote-control systems are wired with AWG conductors.

Correct AnswerverifiedC

Switches are available in up to -switch combinations with features such as pilot light, lighted toggle, and being key-operated.

Correct AnswerverifiedShow Answer

identifying the switch's functions can be prepared and inserted in the switch cover.

Correct AnswerverifiedShow Answer

The principle of operation of a master control with rectifiers is based on the fact that a rectifier permits current in direction(s) .

Correct AnswerverifiedShow Answer

If control requirements are very complex or extensive, a can be installed.

Correct AnswerverifiedShow Answer

A low-voltage remote-control wiring system is operated.

Correct AnswerverifiedShow Answer

What happens to a transformer in the case of an overload?

Correct AnswerverifiedThe circuit transformer is designed so t...View AnswerShow Answer

Larger conductors should be used for long runs to minimize the .

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
A low-voltage remote-control wiring syst...
View Answer

Correct Answer
verified

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Correct Answer
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Correct Answer
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C

Correct Answer
verified
A method known as low-voltage remote con...
View Answer

Correct Answer
verified

Correct Answer
verified
One style of relay is designed to mount ...
View Answer

Correct Answer
verified

Correct Answer
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C

Correct Answer
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Correct Answer
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The circuit transformer is designed so t...
View Answer

Correct Answer
verified