Electrical Machines Hopkinss test in DC motor is conducted at ? Low load. None of these. No load. Full load. Low load. None of these. No load. Full load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator sparking between brushes and commutator surface may be due to over commutation. too rapid reversal of current. any of the above. under commutation. over commutation. too rapid reversal of current. any of the above. under commutation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable tan - delta (tanδ) of dielectric dispassion factor of power transformer insulating oil is generally taken as 3 at 90°C. 2 at 90°C. 0.5 at 90°C. 1 at 90°C. 3 at 90°C. 2 at 90°C. 0.5 at 90°C. 1 at 90°C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction of an unsaturated DC machine is none of above. magnetising. crossmagnetising. demagnetising. none of above. magnetising. crossmagnetising. demagnetising. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit in a transformer is prefered with rated transformer current high frequency supply rated transformer voltage direct current rated transformer current high frequency supply rated transformer voltage direct current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At slip s = 1 torque developed in machine is starting torque. maximum torque. none. electromagnetic torque. starting torque. maximum torque. none. electromagnetic torque. ANSWER DOWNLOAD EXAMIANS APP
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