Electrical Machines Maximum allowable moisture content of power transformer insulating oil is generally taken as 45 ppm. 20 ppm. 25 ppm. 35 ppm. 45 ppm. 20 ppm. 25 ppm. 35 ppm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is increased, the power factor is lagging power factor unity power factor leading power factor None of these lagging power factor unity power factor leading power factor None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is not a necessary condition to be satisfied for synchronising an incoming alternator to an already operating alternator? same phase sequence same frequency same prime mover speed same voltage magnitude same phase sequence same frequency same prime mover speed same voltage magnitude ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Variation in speed by ward-Leonard control of DC motors occurs due to variation in Field excitaion. Supply voltage. Armature current. Armature voltage. Field excitaion. Supply voltage. Armature current. Armature voltage. 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% 57.7% 33.3% 50% 66.3% 57.7% 33.3% 50% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For power factor improvement the synchronous motor is to be heavily loaded and underexcited heavily loaded and over excited lightly loaded and underecited lightly loaded and over excited heavily loaded and underexcited heavily loaded and over excited lightly loaded and underecited lightly loaded and over excited ANSWER DOWNLOAD EXAMIANS APP
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