Electric Drives Questions and Answers, Set 15

Electric Drives Questions and Answers

Q1. 

Swinburne’s test can be conducted on _______

Answer : 

Shunt and compound motor

Q2. 

The unit of angular frequency is Hz.

Answer : 

True

Q3. 

Which of the following core has linear characteristics?

Answer :

Air core

Q4. 

Armature reaction is purely demagnetizing in nature due to a capacitive load in the synchronous motor.

Answer :

True

Q5. 

Zero voltage regulation can be only achieved in leading power factor load.

Answer : 

True

Q6. 

The power factor of a squirrel cage induction motor is ______

Answer :

High at heavy loads only

Q7. 

DC series motor cannot run under no load.

Answer :

True

Q8. 

The power factor of a squirrel cage induction motor is ______

Answer :

Low at light load only

Q9. 

All loops are meshes.

Answer : 

False

Q10. 

The polarity of back e.m.f changes in which of the method?

Answer : 

Plugging

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