A. Exhaust fan
B. Ceiling fan
C. Refrigerator
D. Water pump
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 is preferred when quick speed reversal is the main consideration ?
A. Squirrel cage induction motor
B. Wound rotor induction motor
E. Synchronous motor
D. D.C. 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 which of the following applications the load on motor changes in cyclic order ?
A. Electric shovels
B. Cranes
C. Rolling mills
D. All of the above - For which of the following applications motor has to start with high acceleration ?
A. Oil expeller
B. Floor mill
C. Lifts and hoists
D. Centrifugal pump - An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4×10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is____________?
A. 150msec-1
B. 384msec-1
C. 38.4msec-1
D. 200msec-1 - RC coupling is generally confined to low power applications because of____________?
A. Large value of coupling capacitor
B. Low efficiency
C. Large number of components
D. None of the above - For blowers which of the following motor is preferred ?
A. D.C. series motor
B. D.C. shunt motor
C. Squirrel cage induction motor
D. Wound rotor induction motor - 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 - Which of the following motors is preferred for boom hoist of a travelling crane ?
A. Single phase motor
B. Synchronous motor
C. A.C. slip ring motor
D. Ward-Leonard controlled D.C. shunt motor
