Showing posts with label Synchronous Motor MCQ (English). Show all posts
Showing posts with label Synchronous Motor MCQ (English). Show all posts

Oct 16, 2019

Synchronous Motor Multiple Choice Questions And Answers In English -05

Wednesday, October 16, 2019

1. A synchronous motor which works on a leading power factor and does not drive a mechanical load is called as
(A) static condenser
(B) condenser
(C) synchronous condenser
(D) none of the above
Ans: C

2. A synchronous motor develops maximum power when load angle is
(A) 45°
(B) 60°
(C) 90°
(D) 120°
Ans: C
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Oct 15, 2019

Synchronous Motor Multiple Choice Questions And Answers In English -04

Tuesday, October 15, 2019
1. The induced e.m.f. in a synchronous motor working on leading power factor will be
(A) more than the supply voltage
(B) less than the supply voltage
(C) equal to the supply voltage
Ans: A

2. A 3-phase synchronous motor is running clockwise. If the direction of its field current is reversed
(A) the motor will stop
(B) the motor continue to run in the same direction
(C) the winding of the motor will burn
(D) the motor will run in the reverse direction
Ans: B
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Oct 14, 2019

Synchronous Motor Multiple Choice Questions And Answers In English -03

Monday, October 14, 2019
1. 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
(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
Ans: D

2. Synchronsizingpower of a synchronous machine is
(A) direcly proportional to the synchronous reactance
(6) inversely proportional to the synchronous reactance
(A) equal to the synchronous reactance
(D) none of the above
Ans: B
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Jul 19, 2019

Synchronous Motor Multiple Choice Questions And Answers In English -02

Friday, July 19, 2019
1. When the excitation of an unloaded salient pole synchronous motor suddenly gets disconnected
(A) the motor stops
(B) it runs as a reluctance motor at the same speed
(C) it runs as a reluctance motor at a lower speed
(D) none of the above
Ans: A

2. When V is the applied voltage, then the breakdown torque of a synchronous motor varies as
(A) V
(B) V312
(C) V2
(D) 1/V
Ans: A
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Jul 18, 2019

Synchronous Motor Multiple Choice Questions And Answers In English -01

Thursday, July 18, 2019


1. The operating speed of a synchronous motor can be changed to a new fixed value by
(A) changing the load
(B) changing the supply voltage
(C) changing frequency
(D) using brakes
Ans: C

2. A synchronous motor will always stop when
(A) supply voltage fluctuates
(B) load in motor varies
(C) excitation winding gets disconnected
(D) supply voltage frequency changes
Ans: C
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