A. A 100 H.P. AC. three phase motor
B. Four motors of 25 H.P. each
C. Five motors of 20 H.P. each
D. Ten motors of 10 H.P. each
Related Mcqs:
- For which of the following applications D.C. motors are still preferred ?
A. High efficiency operation
B. Reversibility
C. Variable speed drive
D. High starting torque - Which of the following motors are best for the rolling mills ?
A. Single phase motors
B. Squirrel cage induction motors
C. Slip ring induction motors
D. D.C. motors - Which of the following motors is used for elevators ?
A. Induction motor
B. Synchronous motor
C. Capacitor start single phase motor
D. Any of the above - Which of the following is essentially needed while selecting a motor ?
A. Pulley
B. Starter
C. Foundation pedal
D. Bearings - For derries and winches which of the following drives can be used ?
A. Pole changing squirrel cage motors
B. D.C. motors with Ward-leonard con-trol
C. A.C. slip ring motors with variable resistance
D. Any of the above - For a motor-generator set which of the following motors will be preferred ?
A. Synchronous motor
B. Slip ring induction motor
C. Pole changing induction motor
D. Squirrel cage induction motor - For crane travel which of the following motors is normally used ?
A. Synchronous motor
B. D.C. differentially compound motor
C. Ward-Leonard controlled D.C. shunt motor
D. AC. slip ring motor - Which of the following motors is preferred when smooth and precise speed control over a wide range is desired ?
A. D.C. motor
B. Squirrel cage induction motor
C. Wound rotor induction motor
D. Synchronous motor - In series motor which of the following methods can be used for changing the flux per pole ?
A. Tapped field control
B. Diverter field control
C. Series-parallel control
D. Any of the above - Which of the following types of motor enclosure is safest ?
A. Totally enclosed
B. Totally enclosed fan cooled
C. Open type
D. Semi closed
