Electrical Machines Which of the following DC motors has almost constant speed over their full load range? Compound (cummolative). Series. Shunt. none of these. Compound (cummolative). Series. Shunt. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio 66.3% 50% 57.7% 33.3% 66.3% 50% 57.7% 33.3% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is suitable for frequent starting and stoppings? Capacitor start motor Resistance split phase motor Capacitor start capacitor run motor All of these Capacitor start motor Resistance split phase motor Capacitor start capacitor run motor All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The brushes of a DC machine should be placed on the commutator in the inter polar axis. armature in the polar axis. commutator in the polar axis. armature midway between poles. commutator in the inter polar axis. armature in the polar axis. commutator in the polar axis. armature midway between poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the advantages of carbon brush over the copper brush? In case of any sparking they will be less damaged than copper brushes They are self lubricating in nature They are not hard as copper brush All of these In case of any sparking they will be less damaged than copper brushes They are self lubricating in nature They are not hard as copper brush All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a three phase induction motor has an impedance of 0.4 + j4 ohm per phase at standstill the maximum torque occurs at a slip of _____________. 10 %. 15 %. 50 %. 25 %. 10 %. 15 %. 50 %. 25 %. ANSWER DOWNLOAD EXAMIANS APP
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