Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is 3.76%. 2.57 %. 2.56 %. 4.76%. 3.76%. 2.57 %. 2.56 %. 4.76%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a cumulatively compound DC motor can be controlled by varying Shunt field resistance control. Armature resistance control. Armature voltage control. Any of above. Shunt field resistance control. Armature resistance control. Armature voltage control. Any of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? GNA None of these MNA either GNA or MNA GNA None of these MNA either GNA or MNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The basic function of a transformer is to change the power level the power factor the frequency the level of the voltage the power level the power factor the frequency the level of the voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The field system of an alternator is usually excited 230 V AC. 3 - Φ, 50 Hz and 400 V. 110 / 220 V AC. 250 / 250 V DC. 230 V AC. 3 - Φ, 50 Hz and 400 V. 110 / 220 V AC. 250 / 250 V DC. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is increased, the power factor is leading power factor None of these lagging power factor unity power factor leading power factor None of these lagging power factor unity power factor ANSWER DOWNLOAD EXAMIANS APP
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