Electric Drives BEU Question Paper Solution

Electric Drives BEU Question Paper Solution:- In this article, I have provided the solution of Electric Drives along with its solution based on BEU question paper. I tried to make the solutions very simple so that each and every student can understand it.

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This Blog is to provide BEU Solutions to past year’s question papers in Electric Drives assisting Students in their exam preparation

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1. Choose the correct option of the following.

(i) high efficiency

(ii) low noise

(iii) constant speed

(iv) All of the above. ✔

(i) Plugging braking

(ii) Dynamic braking

(iii) Regenerative braking ✔

(iv) None of the above

(i) Individual

(ii) Multimotor ✔

(iii) Group

(iv) None of the above

(d) The starting torque of a d.c. motor is independent of which of the following?

(i) Flux

(ii) Speed ✔

(iii) Armature current

(iv) Flux and armature current

(e) If the current in the armature of d.c series motor is reduced to 5%, the torque of the motor will become

(i) 50% of the previous value

(ii) 100% of the previous value

(iii) 150% of the previous value ✔

(iv) 25% of the previous value

(f) Which speed control method is preferred for constant torque drive?

(1) Field control

(ii) Mechanical loading system

(iii) Armature voltage control ✔

(iv) None of the above

(g) A step-down chopper can be used in

(i) electric traction

(ii) electric vehicles

(iii) machine tools

(iv) All of the above ✔

(h) A d.e. chopper circuit connected to a 100 V d.c. source supplies an inductive load having 40 mH in series with a resistance of 50. A freewheeling diode is placed across the load. The load current varies between the limits of 10 A and 12 A. The time ratio (Ton/T off) of the chopper is

(i) 1.68 ✔

(ii) 0.98

(iii) 1-22

(iv) 0.75

(i) In an induction motor, when the number of stator slots is equal to an integral number of rotor slots

(i) There may be a discontinuity in torque slip characteristics

(ii) a high starting torque will be available

(iii) the maximum torque will be high

(iv) The machine may fail to start ✔

(j) Induction motor is also known as

(i) frequency changer ✔

(ii) frequency remover

(iii) time period remover

(iv) d.c. machine

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