Electrical Machines If an additional resistance is connected in series with a DC series motor operating at rated speed, the speed of the motor will Remain unaltered. Reduce. Increase. Oscillate around the normal speed. Remain unaltered. Reduce. Increase. Oscillate around the normal speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to uneven air gap. poor lubrication. overheating of winding. overload. uneven air gap. poor lubrication. overheating of winding. overload. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Rotor resistance speed control is used in synchronous motor. dc shunt motor. slip ring induction motor. squirrel cage induction motor. synchronous motor. dc shunt motor. slip ring induction motor. squirrel cage induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will improve with fall of terminal voltage. deteriorate with rise in terminal voltage. deteriorate with fall of terminal voltage. improve with rise in terminal voltage. improve with fall of terminal voltage. deteriorate with rise in terminal voltage. deteriorate with fall of terminal voltage. improve with rise in terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A delta/star transformer is connected in parallel to a star/delta transformer. The turn ratio former is x times latter, the x is 3 1/√3 1/3 √3 3 1/√3 1/3 √3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The crawling in the induction motor is caused by high loads improper design of stator laminations low voltage supply harmonics developed in the motor high loads improper design of stator laminations low voltage supply harmonics developed in the motor ANSWER DOWNLOAD EXAMIANS APP
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