Electrical Machines Transformer cooling and insulating oil must be of low resistivity. low BDV. low viscosity. high viscosity. low resistivity. low BDV. low viscosity. high viscosity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The condition for maximum running torque is R = S.X 0.5 lagging 0.707 lagging unity zero R = S.X 0.5 lagging 0.707 lagging unity zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a seperately excited DC Motor if field current is increased, it will Increase acceleration duration. Reduce starting torque. Increase speed Reduce armature heating. Increase acceleration duration. Reduce starting torque. Increase speed Reduce armature heating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward-Leonard system for controlling the speed of a DC motor is used where All of above. Very fine speed control over the whole range from zero to normal speed is required. The speed in both the direction is required. The accuracy in speed control is required. All of above. Very fine speed control over the whole range from zero to normal speed is required. The speed in both the direction is required. The accuracy in speed control is required. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On what factors the speed of dc motor depends? Applied voltage. All of these. Armature current Ia. Field flux. Applied voltage. All of these. Armature current Ia. Field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit test on transformer gives copper loss both 1and 2 eddy current loss hysteresis loss copper loss both 1and 2 eddy current loss hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
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