Electrical Machines Cogging of induction motor occurs at high voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are equal. low voltage and when stator and rotor poles are not equal. high voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are equal. low voltage and when stator and rotor poles are not equal. 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 voltage magnitude same prime mover speed same frequency same phase sequence same voltage magnitude same prime mover speed same frequency ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The principal of starting of 3 - Φ IM is similar to synchronous motor. capacitor run IM. transformer with short-circuited secondary. repulsion motor type starting. synchronous motor. capacitor run IM. transformer with short-circuited secondary. repulsion motor type starting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two generators G1 and G2 are to be operated in parallel to deliver a total current of 60 A. Generator one has a terminal voltage of 280 V on no load and 240 V when supplying 40 A current. Similarly the second generator has a voltage of 300 V when on no load and 240 V when supplying of 50 A of current. The output voltage of each generator will be 238.2 V. 271.7 V. 256.4 V. 240 V. 238.2 V. 271.7 V. 256.4 V. 240 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In field flux method speed control of DC Motor is constant torque drive above the base speed. constant hp drive below the base speed. constant power drive above base speed. constant torque drive below the base speed. constant torque drive above the base speed. constant hp drive below the base speed. constant power drive above base speed. constant torque drive below the base speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutators in DC machines have a role of which converts high voltage DC to low voltage DC. AC to DC. none of these. Both AC to DC and DC to AC. high voltage DC to low voltage DC. AC to DC. none of these. Both AC to DC and DC to AC. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS