Electrical Engineering Questions And Answers :: Polyphase Induction Motors: part4

Electrical Engineering : Polyphase Induction Motors QUESTIONS AND ANSWERS :: part4 : 6 to 10

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

6.Slip ring motor is preferred over squirrel cage induction motor where

high starting torque is required
load torque is heavy
heavy pull out torque is required
all of the above

7.In a squirrel cage motor the induced e.m.f. is

dependent on the shaft loading
dependent on the number of slots
slip times the stand still e.m.f. induced in the rotor
none of the above

8.In a star-delta starter of an induction motor

resistance is inserted in the stator
reduced voltage is applied to the stator
resistance is inserted in the rotor
applied voltage per1 stator phase is 57.7% of the line voltage

9.Less maintenance troubles are experienced in case of

slip ring induction motor
squirrel cage induction motor
both (a) and (b)
none of the above

10.A squirrel cage induction motor is not selected when

initial cost is the main consideration
maintenance cost is to be kept low
higher starting torque is the main consideration
all above considerations are involved

More Polyphase Induction Motors QUESTIONS AND ANSWERS available in next pages

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