Electrical Machines The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is 60 Hz. 16.67 Hz. 50 Hz. 25 Hz. 60 Hz. 16.67 Hz. 50 Hz. 25 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field system lost residual magnetism field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit field system lost residual magnetism field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The brushes of a DC machine should be placed on the commutator in the polar axis. armature in the polar axis. commutator in the inter polar axis. armature midway between poles. commutator in the polar axis. armature in the polar axis. commutator in the inter polar axis. armature midway between poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following winding is connected in series with armature winding of DC machine? Auxiliary winding. Both Compensating and Commutating pole winding. Commutating pole winding. Compensating winding. Auxiliary winding. Both Compensating and Commutating pole winding. Commutating pole winding. Compensating winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The no load current in a transformer lags the applied voltage by about 115°. 0°. 90°. about 75°. about 115°. 0°. 90°. about 75°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Skewing of cage rotors offers the following advantages uniform torque. all of below. less noise. locking tendency is reduced. uniform torque. all of below. less noise. locking tendency is reduced. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS