DC Motors A dc series motor is that which Has its field winding consisting of thick wire and less turns Has a poor torque Can be started easily without load Has almost constant speed Has its field winding consisting of thick wire and less turns Has a poor torque Can be started easily without load Has almost constant speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Three point starter can be used for Series motor only Both shunt and compound motor Compound motor only Shunt motor only Series motor only Both shunt and compound motor Compound motor only Shunt motor only ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 10% of the previous value 50% of the previous value 25% of the previous value 100% of the previous value 10% of the previous value 50% of the previous value 25% of the previous value 100% of the previous value ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Field's test Swinburne's test Hopkinson's test Brake test Field's test Swinburne's test Hopkinson's test Brake test ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Hysteresis losses Windage losses Copper losses Eddy current losses Hysteresis losses Windage losses Copper losses Eddy current losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Too much brush tension Worn bearings Open armature coil Bent shaft Too much brush tension Worn bearings Open armature coil Bent shaft ANSWER DOWNLOAD EXAMIANS APP
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