MCQ Questions Electrical Engineering Polyphase Induction Motors
As well as questions about your reasons for applying to the role and the employer in question, engineering recruiters will be assessing your potential in the areas that is crucial to any engineering role: technical expertise. Engineers may be asked to perform feats of fantastic technical prowess, but it will be as as part of a Justice League rather than as a solo engineering superhero.
The interviewer is almost as nervous as the candidate in most interviews. You might wonder if you look confident enough, if you will hire the right person, or if you are asking the right engineering interview questions. The last question is arguably the most crucial part to worry about when you’re interviewing candidates.
The best engineering interview questions to ask candidates should be questions that reveal they have the skills required for the job. If you need a problem solver, ask questions about past experiences. If they need to have a specific skill set, ask them directly about their skills. This chapter consisting Electrical engineering MCQ Questions Electrical Engineering Polyphase Induction Motors
There are six major branches of engineering which include Electrical, Mechanical, Civil, Management, Geotechnical, and Chemical with many different subcategories under each main branch of engineering such as Structural or Biomedical engineering.
This article will get into the top engineering interview questions to ask candidates, eight types of interview questions, how to choose the questions you ask, and then will list excellent questions you can choose from. Let’s jump right in.
You can practice interviews using the resources available from our partners. MCQ Questions Electrical Engineering Polyphase Induction Motors are given below.
MCQ Questions Electrical Engineering Polyphase Induction Motors - Set - 3
Question 1:
Rotor rheostat control method of speed control is used for
(a) squirrel-cage induction motors only
(b) slip ring induction motors only
(c) both (a) and (b)
(d) none of the above
Correct Answer – (B)
Question 2 :
It is advisable to avoid line-starting of induction motor and use starter because
(a) motor takes five to seven times its full load current
(b) it will pick-up very high speed and may go out of step
(c) it will run in reverse direction
(d) starting torque is very high
Correct Answer – (A)
Question 3 :
The torque developed in the cage induction motor with auto starter is
(a) k/torque with direct switching
(6) K x torque with direct switching
(c) K2 x torque with direct switching
(d) k2/torque with direct switching
Correct Answer – (C)
Question 4 :
The crawling in the induction motor is caused by
(a) low voltage supply
(b) high loads
(c) harmonics developed in the motor
(d) improper design of the machine
(e) none of the above
Correct Answer – (C)
Question 5 :
The injected e.m.f. in the rotor of induction motor must have
(a) zero frequency
(b) the same frequency as the slip frequency
(c) the same phase as the rotor e.m.f.
(d) high value for the satisfactory speed control
Correct Answer – (B)
MCQ Questions Electrical Engineering Polyphase Induction Motors
Question 6:
Stepless speed control of induction motor is possible by which of the following methods ?
(a) e.m.f. injection in rotor eueuit
(b) Changing the number of poles
(c) Cascade operation
(d) None of the above
Correct Answer – (B)
Question 7:
When the equivalent circuit diagram of double squirrel-cage induction motor is constructed the two cages can be considered
(a) in series
(b) in parallel
(c) in series-parallel
(d) in parallel with stater
Correct Answer – (B)
Question 8:
The auto-starters (using three auto transformers) can be used to start cage induction motor of the following type
(a) star connected only
(b) delta connected only
(c) (a) and (b) both
(d) none of the above
Correct Answer – (C)
Question 9:
Which of the following methods is easily applicable to control the speed of the squirrel-cage induction motor ?
(a) By changing the number of stater poles
(b) Rotor rheostat control
(c) By operating two motors in cascade
(d) By injecting e.m.f. in the rotor circuit
Correct Answer – (A)
Question 10:
An induction motor is identical to
(a) D.C. compound motor
(b) D.C. series motor
(c) synchronous motor
(d) asynchronous motor
Correct Answer – (D)
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