DC Motors The speed of a series motor at no load is Infinity 2000 rpm 4000 rpm 1000 rpm Infinity 2000 rpm 4000 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
DC Motors Differentially compound D.C. motors can find applications requiring Frequent on-off cycles Low starting torque High starting torque Variable speed Frequent on-off cycles Low starting torque High starting torque Variable speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors A series motor will over speed when The load is increase The field is opened Load is removed The armature circuit is opened. The load is increase The field is opened Load is removed The armature circuit is opened. ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens Motor will come to stop This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses This will make armature to take heavy current, possibly burning it Nothing will happen to motor Motor will come to stop This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses This will make armature to take heavy current, possibly burning it Nothing will happen to motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Too much brush tension Bent shaft Open armature coil Worn bearings Too much brush tension Bent shaft Open armature coil Worn bearings ANSWER DOWNLOAD EXAMIANS APP
DC Motors The greatest percentage of power loss in a dc motor is due to Friction loss Windage loss Copper loss Core loss Friction loss Windage loss Copper loss Core loss ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS