Question 1

Solid-state relays intended to control the operation of AC loads use an electronic device called a_____________ to connect the load to the line.

Accepted Answer

A)  diac
B)  triac
C)  thyristor
D)  transducer

Question 2

Relays are used more often to open and close control circuits than to operate power circuits.

Accepted Answer

A) True 
 B)False  True

Question 3

One method of eliminating noise and voltage spikes is to use a_____________ .

Accepted Answer

A)  transient suppressor
B)  semiconductor
C)  temperature-sensitive resistor
D)  transducer

Question 4

Magnetic relays are affected by the electric noise and the voltage spikes induced in the system.

Accepted Answer

A) True 
 B)False

Question 5

Starters, contactors, and ______are similar in construction and operation.

Accepted Answer

A)  mechanical thermostats
B)  symbols
C)  breakers
D)  relays D

Question 6

The greatest advantage of relays with mechanical contacts is that they are resistant to shock and vibration.

Accepted Answer

A) True 
 B)False

Question 7

Most of the relays used in machine tool control have double-break contacts.

Accepted Answer

A) True 
 B)False

Question 8

Solid-state relays generally apply 3 to__________ volts DC to the input to control the operation of the relay.

Accepted Answer

A)  12
B)  22
C)  32
D)  42 C

Question 9

Control magnetic relays are used to control small loads.

Accepted Answer

A) True 
 B)False

Question 10

When the moving element of the thermostat control touches the closed contact, the relay closes and ____________.

Accepted Answer

A)  is held in this position by a maintaining contact
B)  handles the current to a starter coil
C)  causes the relay to freeze
D)  the current flow bypasses the operating coil

Exam 7: Relays

Solid-state relays intended to control the operation of AC loads use an electronic device called a_____________ to connect the load to the line.

Correct Answer
verified

Relays are used more often to open and close control circuits than to operate power circuits.

Correct Answer
verified
True

One method of eliminating noise and voltage spikes is to use a_____________ .

Correct Answer
verified

Magnetic relays are affected by the electric noise and the voltage spikes induced in the system.

Correct Answer
verified

Starters, contactors, and ______are similar in construction and operation.

Correct Answer
verified
D

The greatest advantage of relays with mechanical contacts is that they are resistant to shock and vibration.

Correct Answer
verified

Most of the relays used in machine tool control have double-break contacts.

Correct Answer
verified

Solid-state relays generally apply 3 to__________ volts DC to the input to control the operation of the relay.

Correct Answer
verified
C

Control magnetic relays are used to control small loads.

Correct Answer
verified

When the moving element of the thermostat control touches the closed contact, the relay closes and ____________.

Correct Answer
verified

Exam 7: Relays

Solid-state relays intended to control the operation of AC loads use an electronic device called a_____________ to connect the load to the line.

Correct AnswerverifiedShow Answer

Relays are used more often to open and close control circuits than to operate power circuits.

Correct AnswerverifiedTrue

One method of eliminating noise and voltage spikes is to use a_____________ .

Correct AnswerverifiedShow Answer

Magnetic relays are affected by the electric noise and the voltage spikes induced in the system.

Correct AnswerverifiedShow Answer

Starters, contactors, and ______are similar in construction and operation.

Correct AnswerverifiedD

The greatest advantage of relays with mechanical contacts is that they are resistant to shock and vibration.

Correct AnswerverifiedShow Answer

Most of the relays used in machine tool control have double-break contacts.

Correct AnswerverifiedShow Answer

Solid-state relays generally apply 3 to__________ volts DC to the input to control the operation of the relay.

Correct AnswerverifiedC

Control magnetic relays are used to control small loads.

Correct AnswerverifiedShow Answer

When the moving element of the thermostat control touches the closed contact, the relay closes and ____________.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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True

Correct Answer
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Correct Answer
verified

Correct Answer
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D

Correct Answer
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Correct Answer
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Correct Answer
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C

Correct Answer
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Correct Answer
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