Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 4% 5% 25% 2% 4% 5% 25% 2% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC motors will have percentage increase of input current for the same percentage increase in torque? Cummulative compound. Differntical compound. Series. Shunt. Cummulative compound. Differntical compound. Series. Shunt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature flux is.............with respect to main field flux or main field poles? stationary rotates same direction None of these rotates opposite direction stationary rotates same direction None of these rotates opposite direction ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? generator 1 gets over load 230.7 MW and 369.23 MW respectively generator 2 gets over load 200 MW and 400MW respectively generator 1 gets over load 230.7 MW and 369.23 MW respectively generator 2 gets over load 200 MW and 400MW respectively ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable acidity level of power transformer insulating oil is generally taken as 0.3 mg of KOH / gm. 2 mg of KOH / gm. 0.5 mg of KOH / gm. 1 mg of KOH / gm. 0.3 mg of KOH / gm. 2 mg of KOH / gm. 0.5 mg of KOH / gm. 1 mg of KOH / gm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor is, in general analogous to two winding transformer with secondary short circuited. None of these two winding transformer with secondary open circuited. auto transformer. two winding transformer with secondary short circuited. None of these two winding transformer with secondary open circuited. auto transformer. ANSWER DOWNLOAD EXAMIANS APP
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