Question 1

Auxiliary contacts are intended to control large amounts of current.

Accepted Answer

A) True 
 B)False

Question 2

Relays and contactors operate on the ____________________ principle.

Accepted Answer

solenoid

Question 3

Vacuum contactors enclose their load contacts in a sealed vacuum chamber.

Accepted Answer

A) True 
 B)False

Question 4

What are coil clearing contacts?

Accepted Answer

Many latching type relays and contactors...

Question 5

Mechanically held contactors and relays are often referred to as ____________________ contactors or relays.

Accepted Answer

latching

Question 6

What is a reason for sealing load contacts inside a vacuum chamber?

Accepted Answer

Sealing contacts inside a vacu...

Question 7

Why is it that bridge contacts can control more voltage than clapper types?

Accepted Answer

Bridge contacts can control mo...

Question 8

Contactors are equipped with contacts intended to connect high current loads to the power line; these large contacts are called ____________________ contacts.

Accepted Answer

The answer of Contactors are equipped with contacts intended to...

Question 9

The continuous change of both amplitude and polarity of the magnetic field causes currents to be induced into the metal core material; these currents are called ____________________ currents.

Accepted Answer

The answer of The continuous change of both amplitude and...

Question 10

The advantage of mercury relays is that each time the relay is used the contact is renewed, eliminating burning and pitting cased by an arc when connection is made or broken.

Accepted Answer

A) True 
 B)False

Question 11

Hysteresis loss is often referred to as molecular friction.

Accepted Answer

A) True 
 B)False

Question 12

Motor starters are basically a contactor and overload relay mounted together. Most do not need auxiliary contacts.

Accepted Answer

A) True 
 B)False  False

Question 13

All solenoids that operate on alternating current must have a(n) ____________________ coil.

Accepted Answer

The answer of All solenoids that operate on alternating current...

Question 14

What are relays?

Accepted Answer

Relays are electrome...

Question 15

How is optoisolation achieved?

Accepted Answer

Optoisolation is achieved by u...

Exam 5: Relays, Contactors, and Motor Starters

Auxiliary contacts are intended to control large amounts of current.

Correct Answer
verified

Relays and contactors operate on the ____________________ principle.

Correct Answer
verified
solenoid

Vacuum contactors enclose their load contacts in a sealed vacuum chamber.

Correct Answer
verified

What are coil clearing contacts?

Correct Answer
verified
Many latching type relays and contactors...
View Answer

Mechanically held contactors and relays are often referred to as ____________________ contactors or relays.

Correct Answer
verified
latching

What is a reason for sealing load contacts inside a vacuum chamber?

Correct Answer
verified
Sealing contacts inside a vacu...
View Answer

Why is it that bridge contacts can control more voltage than clapper types?

Correct Answer
verified
Bridge contacts can control mo...
View Answer

Contactors are equipped with contacts intended to connect high current loads to the power line; these large contacts are called ____________________ contacts.

Correct Answer
verified

The continuous change of both amplitude and polarity of the magnetic field causes currents to be induced into the metal core material; these currents are called ____________________ currents.

Correct Answer
verified

The advantage of mercury relays is that each time the relay is used the contact is renewed, eliminating burning and pitting cased by an arc when connection is made or broken.

Correct Answer
verified

Hysteresis loss is often referred to as molecular friction.

Correct Answer
verified

Motor starters are basically a contactor and overload relay mounted together. Most do not need auxiliary contacts.

Correct Answer
verified
False

All solenoids that operate on alternating current must have a(n) ____________________ coil.

Correct Answer
verified

What are relays?

Correct Answer
verified
Relays are electrome...
View Answer

How is optoisolation achieved?

Correct Answer
verified
Optoisolation is achieved by u...
View Answer

Exam 5: Relays, Contactors, and Motor Starters

Auxiliary contacts are intended to control large amounts of current.

Correct AnswerverifiedShow Answer

Relays and contactors operate on the ____________________ principle.

Correct Answerverifiedsolenoid

Vacuum contactors enclose their load contacts in a sealed vacuum chamber.

Correct AnswerverifiedShow Answer

What are coil clearing contacts?

Correct AnswerverifiedMany latching type relays and contactors...View AnswerShow Answer

Mechanically held contactors and relays are often referred to as ____________________ contactors or relays.

Correct Answerverifiedlatching

What is a reason for sealing load contacts inside a vacuum chamber?

Correct AnswerverifiedSealing contacts inside a vacu...View AnswerShow Answer

Why is it that bridge contacts can control more voltage than clapper types?

Correct AnswerverifiedBridge contacts can control mo...View AnswerShow Answer

Contactors are equipped with contacts intended to connect high current loads to the power line; these large contacts are called ____________________ contacts.

Correct AnswerverifiedShow Answer

The continuous change of both amplitude and polarity of the magnetic field causes currents to be induced into the metal core material; these currents are called ____________________ currents.

Correct AnswerverifiedShow Answer

The advantage of mercury relays is that each time the relay is used the contact is renewed, eliminating burning and pitting cased by an arc when connection is made or broken.

Correct AnswerverifiedShow Answer

Hysteresis loss is often referred to as molecular friction.

Correct AnswerverifiedShow Answer

Motor starters are basically a contactor and overload relay mounted together. Most do not need auxiliary contacts.

Correct AnswerverifiedFalse

All solenoids that operate on alternating current must have a(n) ____________________ coil.

Correct AnswerverifiedShow Answer

What are relays?

Correct AnswerverifiedRelays are electrome...View AnswerShow Answer

How is optoisolation achieved?

Correct AnswerverifiedOptoisolation is achieved by u...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified
solenoid

Correct Answer
verified

Correct Answer
verified
Many latching type relays and contactors...
View Answer

Correct Answer
verified
latching

Correct Answer
verified
Sealing contacts inside a vacu...
View Answer

Correct Answer
verified
Bridge contacts can control mo...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified
Relays are electrome...
View Answer

Correct Answer
verified
Optoisolation is achieved by u...
View Answer