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Why the double cage rotor of a 3-phase squirrel cage induction motor is short circuited ?
(4) To reduce the slip (B) एणा quick starting
(C) For pulling more load (D) 1௦ maintain good torque

Why the rotor bars of a 3 phase squirrel cage induction motor are mounted in a slightly
skewed position ?

(4) To avoid magnetic locking (B) To maintain constant speed

(C) Torun with more load than rated (D) To increase the efficiency of motor

Why starter is necessary for the operation of 3 phase induction motors ?
(4) To protect the motor from leakage
(B) To protect the motor from over load
(C) 7௦ protect the motor from over voltage
(D) 1൦ protect the motor from under voltage

What is the rating of backup fuse to be provided for a 10112 AC 3 phase squirrel cage
induction motor ?

(A) 16 Amps (B) 20 Amps

(C) 25 Amps (D) 63 Amps

What is the amount of torque reduced while the motor is running in star connection
compared to delta connection ?
(A) 1/6 Times (B) 1/3 Times
(€) 3 Times (D) 3 Times

Which type of the starters are suitable for three phase squirrel cage induction motor from
20 to 150 HP?
(൧) Rotor - resistance starter (B) Auto Star - delta starter
(C) Auto transformer starter (D) Manual star delta starter

Which type of single phase motor is having a commutator ?
(A) Stepper motor ൯) Repulsion motor
(C) Shaded pole motor (D) Permanent capacitor motor

Which places capacitor start, capacitor run induction motor are used ?
(A) Wet grinders (B) Compressors
(C) Water pump motor (D) Washing machines

Which motor is used in ceiling fan ?
(A) Universal Motor (B) Shaded Pole motor
(C) Permanent capacitor motor (D) Capacitor start, capacitor run motor

9 ಲ 015/2021
[P.T.O.]