Three Phase Induction Motors The speed of a squirrel-cage induction motor can be controlled by all of the following except Changing number of poles Changing supply frequency Changing winding resistance Reducing supply voltage Changing number of poles Changing supply frequency Changing winding resistance Reducing supply voltage 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 High rotor resistance is required during running Speed control is required High starting torque is required Less costly motor is not required High rotor resistance is required during running Speed control is required ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors At no load the rotor core loss of a 3 phase induction motor is None of the listed here Practically zero Large Small None of the listed here Practically zero Large Small ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The induction motor has lagging power factor during Starting only Both starting and operation Operation only None of the listed here Starting only Both starting and operation Operation only None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Reduced voltage starter can be used with None of these Slip ring motor only but not with squirrel cage induction motor Squirrel cage induction motor only but not with slip ring motor Squirrel cage as well as slip ring induction motor None of these Slip ring motor only but not with squirrel cage induction motor Squirrel cage induction motor only but not with slip ring motor Squirrel cage as well as slip ring induction motor ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The efficiency of an induction motor can be expected to be nearly 99% 95 to 98 % 60 to 90% 80 to 90% 99% 95 to 98 % 60 to 90% 80 to 90% ANSWER DOWNLOAD EXAMIANS APP
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