Three Phase Induction Motors The torque developed in the cage induction motor with auto-starter is K × torque with direct switching K2 × torque with direct switching k/torque with direct switching k2/torque with direct switching K × torque with direct switching K2 × torque with direct switching k/torque with direct switching k2/torque with direct switching ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The efficiency of an induction motor can be expected to be nearly 95 to 98 % 99% 80 to 90% 60 to 90% 95 to 98 % 99% 80 to 90% 60 to 90% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A wound rotor motor is mainly used in applications where ______ High starting torque is required Less costly motor is not required Speed control is required High rotor resistance is required during running High starting torque is required Less costly motor is not required Speed control is required High rotor resistance is required during running ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Which of the following component is usually fabricated out of silicon steel? Shaft None of these Bearings Stator core Shaft None of these Bearings Stator core ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The speed of a squirrel-cage induction motor can be controlled by all of the following except Reducing supply voltage Changing number of poles Changing supply frequency Changing winding resistance Reducing supply voltage Changing number of poles Changing supply frequency Changing winding resistance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The rotor of induction motor Always revolves in the direction of stator flux None of the listed here Insufficient data Always revolves in the direction opposite to stator flux Always revolves in the direction of stator flux None of the listed here Insufficient data Always revolves in the direction opposite to stator flux ANSWER DOWNLOAD EXAMIANS APP
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