Computer Programming MCQs

5739 MCQs  (Page 71 of 574)

Which of the following motors is inherently self starting ?
A. Split motor
B. Shaded-pole motor
C. Reluctance motor
D. None of these
Direction of rotation of a split phase motor can be reversed by reversing the connection of__________?
A. Running winding only
B. Starting winding only
C. Either a. or (b)
D. Both a. and (b)
Burning out of winding is due to___________?
A. Short circuited capacitor
B. Capacitor value hiving changed
C. Open circuiting of capacitor
D. None of the above
Short-circuiter is used in_____________?
A. Repulsion induction motor
B. Repulsion motor
C. Repulsion start induction run motor
D. None of the above
In a capacitor start single-phase motor, when capacitor is replaced by a resistance____________?
A. Torque will increase
B. The motor will consume less power
C. Motor will run in reverse direction
D. Motor will continue to run in same direction
A shaded pole motor can be used for_____________?
A. Toys
B. Hair dryers
C. Circulators
D. Any of the above
The power factor of a single-phase induction motor is usually?
A. Lagging
B. Always leading
C. Unity
D. Unity to 0.8 leading
Which of the following motor will give the highest starting torque ?
A. D.c. shunt motor
B. Schrage motor
C. Repulsion start and induction run motor
D. Universal motor
A hysteresis motor works on the principle of__________?
A. Hysteresis loss
B. Magnetisation of rotor
C. Eddy current loss
D. Electromagnetic induction