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Electrical and Electronics Engineering MCQs | Page - 7

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. 61) If number of conductors in a dc generator is Z then total number of turns are

(A) z
(B) 2z
(C) z/2
(D) 4z
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Mr. Dubey • 51.43K Points
Coach

Q. 62) What is the flux in the armature core section of a dc machine if the air gap flux be ø Wb?

(A) ø
(B) 0.1 ø
(C) 1.5 ø
(D) ø /2
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Mr. Dubey • 51.43K Points
Coach

Q. 63) The flux leakage coefficient in dc machine is usually

(A) 0.6 to 0.8
(B) 1.05
(C) 1.2 to 1.3
(D) 2 to 2.5
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Mr. Dubey • 51.43K Points
Coach

Q. 64) Armature resistance of a d.c. machine is about

(A) 25
(B) 200
(C) 100
(D) 0.1
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M

Mr. Dubey • 51.43K Points
Coach

Q. 65) The electrical equivalent of gross mechanical power developed in a dc motor is

(A) vil
(B) ebil
(C) ebia
(D) ebish
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M

Mr. Dubey • 51.43K Points
Coach

Q. 66) The armature torque is ------ that of shaft torque

(A) less than
(B) same as
(C) greater than
(D) none of these
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M

Mr. Dubey • 51.43K Points
Coach

Q. 67) If the voltage equation of a dc motor is multiplied by ----- on both sides, we get power equation of dc motor

(A) ra
(B) v
(C) n
(D) ia
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Mr. Dubey • 51.43K Points
Coach

Q. 68) The torque equation of a dc motor is --

(A) ta = 0.159Ø ia/2πpza
(B) ta = 0.159Øia/2πza
(C) ta = 0.159Øiaz/2πa
(D) ta = 0.159Øiapz/a
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M

Mr. Dubey • 51.43K Points
Coach

Q. 69) The speed of dc motor is highest on

(A) no load
(B) 70% of full load
(C) 10% of full load
(D) 100% of full load
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M

Mr. Dubey • 51.43K Points
Coach

Q. 70) With given power rating for lower current and higher voltage rating of a d.c. machine, one should prefer_________.

(A) lap winding
(B) wave winding
(C) none of these
(D) any of these
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