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Electrical and Electronics Engineering MCQs | Page - 9

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. 81) when rotor of 3-phase I.M.motor is blocked stopped forcibly, the slip is ---

(A) 0
(B) 0.5
(C) 0.1
(D) 1
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M

Mr. Dubey • 51.43K Points
Coach

Q. 82) The quantity (Ns-N) with respect to I.M. motor is called----

(A) slip
(B) frequency
(C) relative speed
(D) speed of rotor
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M

Mr. Dubey • 51.43K Points
Coach

Q. 83) frequency( fr) of induced emf in rotor of I.M. is given by --

(A) s2.f
(B) f2.s
(C) s/f
(D) s.f
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M

Mr. Dubey • 51.43K Points
Coach

Q. 84) At any given slip s the rotor induced emf (E2r) is ----

(A) f/e2
(B) f.e2
(C) s.e2
(D) s/e2
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M

Mr. Dubey • 51.43K Points
Coach

Q. 85) Rotor induced emf is maximum when slip is --

(A) 0
(B) 1
(C) 0.5
(D) 0.05
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M

Mr. Dubey • 51.43K Points
Coach

Q. 86) At any given slip s the rotor reactance is ----

(A) s.x2
(B) s/x2
(C) fr.x2
(D) f.x2
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M

Mr. Dubey • 51.43K Points
Coach

Q. 87) The reactance of the rotor circuit of 3-phase I.M. is maxium at

(A) no-load
(B) full-load
(C) half of full load
(D) start
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M

Mr. Dubey • 51.43K Points
Coach

Q. 88) which mathematical expression represents correct formula to find rotor current (I2)during starting

(A) e2. √(r2+x2)
(B) s.e2 / √(r22+x22)
(C) e2/ √(r22+x22)
(D) s.e2. √(r2+x2)
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M

Mr. Dubey • 51.43K Points
Coach

Q. 89) which mathematical expression represents correct formula to find rotor current when running at slip s.(I2r)

(A) e2. √(r2+x2)
(B) s.e2/ √(r22+x22)
(C) e2. √(r2+x2)
(D) s.e2/ √(r22+s2x22)
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M

Mr. Dubey • 51.43K Points
Coach

Q. 90) The rotor current in 3-phase I.M. is-----slip

(A) inversely proportional to slip
(B) directly proportional to slip
(C) independent of
(D) directly proportional to square of slip
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