@⇒ A.C.Machine ⇒ Electrical Engineering Multiple Choice Questions / Objective type questions, MCQ's, with question and answers, download free PDF, short cut notes, rapid fire notes, best theory

Home⇒ Engineering⇒ Ac machine

Note:- You can add tough questions into your favourite list for second revision.


Q1.	In a 3-phase induction motor, the stator slots are
A.	equal to rotor slots. [Wrong Answer]
B.	exact multiple of rotor slots. [Wrong Answer]
C.	not exact multiple of rotor slots. [Correct Answer]
D.	none of the above. [Wrong Answer]
View Answer 52 -29 Explanation:- Answer : C Discuss it below : Click here for more comments


Q2.	In an induction motor, what is the ratio of rotor copper loss and rotor input?
A.	1/s [Wrong Answer]
B.	s [Correct Answer]
C.	(1 - s) [Wrong Answer]
D.	s/(1 - s) [Wrong Answer]
View Answer 32 -38 Explanation:- Answer : B Discuss it below : Click here for more comments


Q3.	A 3-phase slip-ring induction motor is fed from the rotor side with stator winding short circuited. The frequency of the currents in the short-circuited stator is
A.	slip frequency [Correct Answer]
B.	supply frequency [Wrong Answer]
C.	frequency corresponding to rotor speed [Wrong Answer]
D.	zero. [Wrong Answer]
View Answer 28 -17 Explanation:- Answer : A Discuss it below : Silent V3 King Said on 2023-03-15 02:08:55 the power factor act with single phase induction motor used oprating Vikas panwar Said on 2022-01-23 04:25:47 Kya koi mujhe bata sakta he ki ye sabhi EE ke MCQ kis book se liye gye he Click here for more comments


Q4.	Reactor is introduced in the ignition circuit of a mercury arc rectifier to limit
A.	wave ripples [Wrong Answer]
B.	circuit voltage [Wrong Answer]
C.	circuit current. [Correct Answer]
D.	none of these [Wrong Answer]
View Answer 18 -7 Explanation:- Answer : C Discuss it below : Click here for more comments


Q5.	In 3-phase induction motors, sometitl]es copper bars are placed deep in the rotor. It is done in order to improve
A.	efficiency. [Wrong Answer]
B.	starting torque. [Correct Answer]
C.	power factor. [Wrong Answer]
D.	none of these [Wrong Answer]
View Answer 18 -6 Explanation:- Answer : B Discuss it below : Click here for more comments

1 2 ..Next.>> Page 1 of 224

Or