Cross magnetization effects which of the following? commutation reduces the terminal voltage reduction in main field flux both 2 and 3 TRUE ANSWER : ? YOUR ANSWER : ?
Quadrature axis synchronous reactance is the ratio of Vmin to Imin. Vmin to Imax. Vmax to Imin. Vmax to Imax. TRUE ANSWER : ? YOUR ANSWER : ?
For a DC Motor for constant load torque, what will happen to the armature current if armature resistance increases? Increases. Remain unchanged Decreases. None of above. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following motor is more expensive for same KW output rating ? Synchronous motor. AC single phase motor. DC Shunt Motor Induction motor. TRUE ANSWER : ? YOUR ANSWER : ?
Transformer oil is used as both A and B. an insulator. inert medium. a coolant. TRUE ANSWER : ? YOUR ANSWER : ?
The slot edges in a DC machine are made of Mild steel. Silicon steel. Fibre. Cast iron. TRUE ANSWER : ? YOUR ANSWER : ?
In shaded pole induction motors, the flux moves from ------------- region to ----------------- region respectively? shaded, shaded shaded, unshaded unshaded, shaded unshaded, unshaded TRUE ANSWER : ? YOUR ANSWER : ?
A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be 220 V. about 50 V. about 2 V. zero. TRUE ANSWER : ? YOUR ANSWER : ?
To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used. Rheostatic control. None of above. Ward Leonard control. Any of above method. TRUE ANSWER : ? YOUR ANSWER : ?
The no load and full load speed of DC motor are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor ? 18.25%. 15.30%. 16.67%. 14.28%. TRUE ANSWER : ? YOUR ANSWER : ?