Electrical Machines Dummy coils are used for increasing efficiency. All of these reducing armature reaction. mechanical balancing. increasing efficiency. All of these reducing armature reaction. mechanical balancing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing terminal voltage. increasing input power of the prime mover. increasing armature resistance. increasing armature cooling. increasing terminal voltage. increasing input power of the prime mover. increasing armature resistance. increasing armature cooling. 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 voltage magnitude same frequency same prime mover speed same phase sequence same voltage magnitude same frequency same prime mover speed same phase sequence ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will increase to a value greater than 1.25 times 220 V increase to 1.25 times 220 V not change and remain at 220 V increase to value lying between 220 V and 1.25 times 220 V increase to a value greater than 1.25 times 220 V increase to 1.25 times 220 V not change and remain at 220 V increase to value lying between 220 V and 1.25 times 220 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC motor is laminated to reduce the mass. to reduce the hysteresis loss. to reduce the inductor. to reduce the eddy current loss. to reduce the mass. to reduce the hysteresis loss. to reduce the inductor. to reduce the eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are not a self starting motor? None of these 3-phase induction motor both 1 and 2 1-phase induction motor None of these 3-phase induction motor both 1 and 2 1-phase induction motor ANSWER DOWNLOAD EXAMIANS APP
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