Question 1

Synchronous motors are

Accepted Answer

A) not-self starting 
B) self-starting 
C) essentially self-starting 
D) none of the above 
A) not-self starting 
B) self-starting 
C) essentially self-starting 
D) none of the above

Question 2

An over excited synchronous motor is used for

Accepted Answer

A) fluctuating loads 
B) variable speed loads 
C) low torque loads 
D) power factor corrections 
A) fluctuating loads 
B) variable speed loads 
C) low torque loads 
D) power factor corrections

Question 3

When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor

Accepted Answer

A) remains same as the original value 
B) decreases to half the original value 
C) tends to becomes zero 
D) increases to two times the original value 
A) remains same as the original value 
B) decreases to half the original value 
C) tends to becomes zero 
D) increases to two times the original value

Question 4

The operating speed of a synchronous motor can be changed to new fixed value by

Accepted Answer

A) changing the load 
B) changing the supply voltage 
C) changing frequency 
D) using brakes 
A) changing the load 
B) changing the supply voltage 
C) changing frequency 
D) using brakes

Question 5

A synchronous motor working at leading power factor can be used as

Accepted Answer

A) voltage booster 
B) phase advancer 
C) noise generator 
D) mechanical synchronizer 
A) voltage booster 
B) phase advancer 
C) noise generator 
D) mechanical synchronizer

Synchronous motors are

An over excited synchronous motor is used for

When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor

The operating speed of a synchronous motor can be changed to new fixed value by

A synchronous motor working at leading power factor can be used as

Synchronous Motors: Part A

Synchronous Motor: Part B

Synchronous Motors and Their Operation

Synchronous Motor: Power Factor, Back EMF, Torque, Losses

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Exam 4: Synchronous Motor Characteristics and Applications

Synchronous motors are

An over excited synchronous motor is used for

When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor

The operating speed of a synchronous motor can be changed to new fixed value by

A synchronous motor working at leading power factor can be used as

Synchronous Motors: Part A

Synchronous Motor: Part B

Synchronous Motors and Their Operation

Synchronous Motor: Power Factor, Back EMF, Torque, Losses

Filters