Electrical Machines An induction motor has synchronous speed of 1500 rpm. What will be the slip when it is running at a speed of 1450 rpm? -3% +3% -3.33% +3.33% -3% +3% -3.33% +3.33% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a polyphase induction motor helps to increase the starting torque. reduce the chance of crawling. reduce the chance of cogging. reduce the magnetizing current. increase the starting torque. reduce the chance of crawling. reduce the chance of cogging. reduce the magnetizing current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power developed in a cylindrical synchronous machine depends on both 1and 2 synchronous reactance load angle excitation both 1and 2 synchronous reactance load angle excitation ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Demagnetization effects which of the following? both B and C reduces the terminal voltage commutation reduction in main field flux both B and C reduces the terminal voltage commutation reduction in main field flux ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will not start automatically. get damaged. develop very low starting torque. start automatically without trouble. not start automatically. get damaged. develop very low starting torque. start automatically without trouble. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 6 pole lap connected DC generator with 480 conductors has armature resistance of 0.06 Ω. If the conductors are reconnected to from a wave winding other things remaining unchanged, the value of armature resistance will be 0.54 Ω. 0.54 Ω. 0.01 Ω. 0.06 Ω. 0.54 Ω. 0.54 Ω. 0.01 Ω. 0.06 Ω. ANSWER DOWNLOAD EXAMIANS APP
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