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Dear candidates you will find MCQ questions of Electrical and Electronics Engineering here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

M

Mr. Dubey • 51.43K Points
Coach

Q. 121) Under running condition , the rotor resistance is proportional to

(A) induced emf
(B) rotor current
(C) slip
(D) none of these
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M

Mr. Dubey • 51.43K Points
Coach

Q. 122) At start the rotor power factor is

(A) very high
(B) very low
(C) unity
(D) zero
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M

Mr. Dubey • 51.43K Points
Coach

Q. 123) Power factor of rotor of three phase induction motor depends on

(A) rotor resistance
(B) speed of rotor
(C) rotor reactance
(D) all of these
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M

Mr. Dubey • 51.43K Points
Coach

Q. 124) The function of starter is

(A) to start the motor
(B) to start and stop the motor
(C) to limit the starting current
(D) to limit the applied the voltage
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M

Mr. Dubey • 51.43K Points
Coach

Q. 125) With the increase in the speed of a dc motor:

(A) both back emf as well as line current increases
(B) both back emf and line current falls
(C) back emf increases but the line current falls
(D) back emf falls and line current increases
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M

Mr. Dubey • 51.43K Points
Coach

Q. 126) The output indicated on the name plate of any motor is always the:

(A) gross power
(B) power drawn in volt amperes
(C) power drawn in watts
(D) output power at the shaft
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M

Mr. Dubey • 51.43K Points
Coach

Q. 127) The direction of rotation of dc shunt motor can be reversed by interchanging:

(A) the supply terminals
(B) the field terminals
(C) the armature terminals only
(D) either field or armature terminals
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M

Mr. Dubey • 51.43K Points
Coach

Q. 128) The output power of any electrical motor is taken from the:

(A) armature
(B) field
(C) coupling mounted on the shaft
(D) motor frame
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M

Mr. Dubey • 51.43K Points
Coach

Q. 129) If the back emf in a dc motor varnishes suddenly, then the motor:

(A) run at very high speeds
(B) start hunting
(C) burn
(D) come to stall
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M

Mr. Dubey • 51.43K Points
Coach

Q. 130) The direction of the armature current in a dc motor is:

(A) the same as the generated emf
(B) opposite to that of generated emf
(C) not dependent upon the direction of the armature emf
(D) none of the above
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