Question 1

The difference between a motor starter and a relay or contactor is that a motor starter also contains ____________________ protection for the motor.

Accepted Answer

overload

Question 2

What are the three methods of operating a photoelectric switch?

Accepted Answer

The three methods of operating a photoelectric switch are: thru-beam, retroreflective, and diffuse.

Question 3

A capacitive proximity switch senses conductive and non-conductive material.

Accepted Answer

A) True 
 B)False  True

Question 4

What are the two versions of the inductive proximity switch?

Accepted Answer

The answer of What are the two versions of the...

Question 5

Pushbutton switches are manually operated and require a turning motion to operate.

Accepted Answer

A) True 
 B)False

Question 6

When a relay is in its de-energized state, a magnetic field exists in the coil.

Accepted Answer

A) True 
 B)False

Question 7

Inductive proximity switches will not detect ____.

Accepted Answer

A)  aluminum 
B)  iron 
C)  steel 
D)  plastic

Question 8

Which of the following is not a type of relay?

Accepted Answer

A)  time-delay 
B)  latching 
C)  double-throw 
D)  diffuse

Question 9

The letters NO represent ____.

Accepted Answer

A)  not open 
B)  not operated 
C)  normally off 
D)  normally open

Question 10

When a relay is de-energized, ____.

Accepted Answer

A)  the contacts remain closed 
B)  the contacts are mechanically held 
C)  spring tension causes the contacts to open 
D)  cooling is required before the relay can be re-energized

Question 11

What kind of switches are designed to switch higher voltages and currents?

Accepted Answer

A)  standard duty 
B)  heavy duty 
C)  pilot duty 
D)  regular duty

Question 12

A relay is a(n) ____________________ switch.

Accepted Answer

The answer of A relay is a(n) ____________________ switch....

Question 13

Some type of human intervention is needed to operate ____________________ devices.

Accepted Answer

The answer of Some type of human intervention is needed...

Question 14

Photoelectric switches have all but which of the following components?

Accepted Answer

A)  transmitter 
B)  transformer 
C)  receiver 
D)  switching device

Question 15

A retroreflective device transmits the light to a reflector and detects the reflected light at its receiver.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is not a part of a limit switch?

Accepted Answer

A)  actuator 
B)  body 
C)  contact blocks 
D)  housing

Question 17

____________________ switches are noncontact-type switches that are used to sense the presence or absence of an object without actually contacting the object.

Accepted Answer

The answer of ____________________ switches are noncontact-type switches that are...

Question 18

The make-before-break switch is used in circuits that cannot tolerate the brief open-circuit condition created by the break-before-make switch.

Accepted Answer

A) True 
 B)False

Exam 21: Control and Controlled Devices

The difference between a motor starter and a relay or contactor is that a motor starter also contains ____________________ protection for the motor.

What are the three methods of operating a photoelectric switch?

A capacitive proximity switch senses conductive and non-conductive material.

What are the two versions of the inductive proximity switch?

Pushbutton switches are manually operated and require a turning motion to operate.

When a relay is in its de-energized state, a magnetic field exists in the coil.

Inductive proximity switches will not detect ____.

Which of the following is not a type of relay?

The letters NO represent ____.

When a relay is de-energized, ____.

What kind of switches are designed to switch higher voltages and currents?

A relay is a(n) ____________________ switch.

Some type of human intervention is needed to operate ____________________ devices.

Photoelectric switches have all but which of the following components?

A retroreflective device transmits the light to a reflector and detects the reflected light at its receiver.

Which of the following is not a part of a limit switch?

____________________ switches are noncontact-type switches that are used to sense the presence or absence of an object without actually contacting the object.

The make-before-break switch is used in circuits that cannot tolerate the brief open-circuit condition created by the break-before-make switch.