Three Phase Induction Motors An induction motor is preferred to a dc motor because it _______ Provides high starting torque Provides fine speed control Has simple and rugged construction None of the listed here Provides high starting torque Provides fine speed control Has simple and rugged construction None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Insertion of resistance in the rotor of an induction motor to develop a given torque Rotor current becomes zero Decreases the rotor current Increases the rotor current Rotor current remains same Rotor current becomes zero Decreases the rotor current Increases the rotor current Rotor current remains same ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The condition of induction motor at stand still resemble those of a transformer whose secondady is _______ Supplying a variable resistive load Short circuited None of the listed here Open circuited Supplying a variable resistive load Short circuited None of the listed here Open circuited ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors An induction motor with 1000 r.p.m. speed will have 6 poles 2 poles 4 poles 8 poles 6 poles 2 poles 4 poles 8 poles ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A 3 phase induction motor is ________ Not easily maintainable Very costly Essentially a constant speed motor A variable speed motor Not easily maintainable Very costly Essentially a constant speed motor A variable speed motor ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The air gap between stator and rotor of 3-phase induction motor ranges from ______ 2 cm to 4 cm 1 cm to 2 cm 4 cm to 6 cm 0.4 mm to 4 mm 2 cm to 4 cm 1 cm to 2 cm 4 cm to 6 cm 0.4 mm to 4 mm ANSWER DOWNLOAD EXAMIANS APP
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