Exam 20: Low-Voltage Remote Control

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.

Free

(Multiple Choice)

4.9/5

(39)

Question 1

Correct Answer:

Verified

When are low-voltage remote-control systems advantageous?

Free

(Essay)

4.8/5

(40)

Question 2

Correct Answer:

Verified

Low-voltage remote control systems are chosen because of the number of switches required and when it is desired to have extensive control of the lighting. Low-voltage remote-control systems are available ranging from very simple to very complex. These systems can provide control from multiple locations, automatic timing control, handheld (wireless)controls, occupancy sensors ("On" when motion is detected)and unoccupancy sensors ("Off " with predetermined time-delay when no one is in the room), ceiling and wall mounted sensors, photocell control for security ("On" at dusk, "Off " at dawn), and programmable controls. Federally mandated energy codes are an energy standard for buildings, such as the joint publication ANSI/ASHRAE/IESNA 90.1, the most widely adopted energy standard

The low-voltage relay is available in ____ mounting styles.

Free

(Multiple Choice)

4.7/5

(33)

Question 3

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.

(Multiple Choice)

4.8/5

(39)

Question 4

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

(Multiple Choice)

4.8/5

(44)

Question 5

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

(Multiple Choice)

4.7/5

(35)

Question 6

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

(Multiple Choice)

4.7/5

(42)

Question 7

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

(Essay)

5.0/5

(36)

Question 8

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

(Multiple Choice)

4.7/5

(31)

Question 9

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

(Multiple Choice)

4.9/5

(35)

Question 10

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

(Multiple Choice)

4.8/5

(29)

Question 11

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

(Essay)

4.9/5

(34)

Question 12

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

(Multiple Choice)

4.9/5

(43)

Question 13

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

(Multiple Choice)

4.8/5

(33)

Question 14

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

(Essay)

4.8/5

(30)

Question 15

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

(Multiple Choice)

4.9/5

(39)

Question 16

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

(Multiple Choice)

4.7/5

(34)

Question 17

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

(Multiple Choice)

4.8/5

(39)

Question 18

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

(Essay)

4.7/5

(36)

Question 19

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

(Multiple Choice)

4.9/5

(44)

Question 20

Showing 1 - 20 of 20

Exam 20: Low-Voltage Remote Control

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.

When are low-voltage remote-control systems advantageous?

The low-voltage relay is available in ____ mounting styles.

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Commercial Building Plans and Specifications

Reading Electrical Working Drawings--Entry Level

General Requirements for Conductors

Branch Circuits

Switches and Receptacles

Wiring Methods

Motor and Appliance Circuits

Feeder Installation and Load Calculation

Special Systems

Working Drawings--Upper Level

Special Circuits Owners Circuits

Panelboard Selection and Installation

The Electric Service and Grounding

Lamps and Ballasts for Lighting

Luminaires

Emergency, Legally Required Standby, and Optional Standby Power Systems

Overcurrent Protection: Fuses and Circuit Breakers

Short-Circuit Calculations and Coordination of Overcurrent Protective Devices

Equipment and Conductor Short-Circuit

The Cooling System

Commercial Utility-Interactive Photovoltaic Systems

Filters