Electrical Machines In a DC Shunt Motor if the load current increases then field flux decreases increases. decreases. remains constant. decreases increases. decreases. remains constant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The functions of inter poles are None of these nullify reactance voltage and improve the commutation. reduce cross magnetization effect and improve commutation both 1 and 2 None of these nullify reactance voltage and improve the commutation. reduce cross magnetization effect and improve commutation both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 201.02 V. 210 V. 212 V. 205 V. 201.02 V. 210 V. 212 V. 205 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an induction motor, what is the ratio of rotor input to rotor copper loss? 1-S 1/S S 1/(1-S) 1-S 1/S S 1/(1-S) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Small and constant load. Over-excitation. Over-loading for long period. Periodic variation of load. Small and constant load. Over-excitation. Over-loading for long period. Periodic variation of load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, for the same value of Æ, Z and N; which one of the following statements is correct? Armature emf is same as long as the flux density in the air gap remains the same. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is more with wave winding than with lap winding. Armature emf is less with wave winding than with lap winding. Armature emf is same as long as the flux density in the air gap remains the same. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is more with wave winding than with lap winding. Armature emf is less with wave winding than with lap winding. ANSWER DOWNLOAD EXAMIANS APP
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