Electrical Machines Which type of bearing is provided in small induction motors to support the rotor shaft? Ball bearings. Cast iron bearings. None of these Bush bearings. Ball bearings. Cast iron bearings. None of these Bush bearings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increase in speed of DC motor Back emf increase but line current falls. Both back emf as well as line current increase. Both back emf as well as line current fall. Back emf falls and line current increase. Back emf increase but line current falls. Both back emf as well as line current increase. Both back emf as well as line current fall. Back emf falls and line current increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing carbon brushes. equalizer rings. graphite brushes. commutator with large number of segments. carbon brushes. equalizer rings. graphite brushes. commutator with large number of segments. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To avoid formation of grooves in the commutator brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. None of these the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. None of these the brushes of opposite polarity should track each other. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer which of the following losses are zero? All of these Iron loss Rotational loss Copper loss All of these Iron loss Rotational loss Copper loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit in a transformer is prefered with direct current high frequency supply rated transformer current rated transformer voltage direct current high frequency supply rated transformer current rated transformer voltage ANSWER DOWNLOAD EXAMIANS APP
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