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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. 141) The material used for commutator brushes is mostly

(A) copper
(B) carbon
(C) mica
(D) cast iron
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Mr. Dubey • 51.43K Points
Coach

Q. 142) A 4 pole DC generator rotates at 1500 rpm. How many times in a second, will the emf induced in each armature conductor changes its direction?

(A) 750
(B) 100
(C) 500
(D) 200
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M

Mr. Dubey • 51.43K Points
Coach

Q. 143) Magnetic field of a DC generator is produced by what?

(A) permanent magnets
(B) electromagnets
(C) both option b & c
(D) none of the options
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Mr. Dubey • 51.43K Points
Coach

Q. 144) In a DC generator the emf generated by the armature is maximum when

(A) rate of change of flux is maximum
(B) rate of change of flux is minimum
(C) induced voltage is high
(D) shaft rotation is high
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M

Mr. Dubey • 51.43K Points
Coach

Q. 145) What is the actual arrangement of series wound generator?

(A) armature and field both are parallel
(B) armature and field both are connected
(C) increase the speed of shaft rotation
(D) armature and field both are in series with the load
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Mr. Dubey • 51.43K Points
Coach

Q. 146) What is the effect of armature reaction?

(A) armature flux weakens the main field flux
(B) armature flux distorts the main field flux
(C) both option b & a
(D) none of the options
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Mr. Dubey • 51.43K Points
Coach

Q. 147) In DC machine, brushes are always placed along

(A) magnetic neutral axis
(B) geometrical neutral axis
(C) armature axis
(D) load axis
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Mr. Dubey • 51.43K Points
Coach

Q. 148) What type of connection is made in between the interpole & the field winding?

(A) series
(B) parallel
(C) compound
(D) none of the options
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Mr. Dubey • 51.43K Points
Coach

Q. 149) In DC machine, lap winding is used in

(A) high current and low voltage applications
(B) high voltage and low current applications
(C) where constant speed is required
(D) where greater load is connected
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Mr. Dubey • 51.43K Points
Coach

Q. 150) ____ dc machine are most common.

(A) 2-pole
(B) 4-pole
(C) 6-pole
(D) 8-pole
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