A. Slip ring induction motor
B. Synchronous motor
C. D.C. shunt motor
D. Schrage motor
Related Mcqs:
- __________________ has relatively wider range of speed control?
A. Synchronous motor
B. Ship ring induction motor
C. Squirrel cage induction motor
D. D.C. shunt 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 - For three-phase induction motors which of the following is the least efficient method of speed control ?
A. Cascade control
B. Pole changing
C. Rheostat control
D. Combination of cascade and pole changing - 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 - While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?
A. Running characteristics
B. Starting characteristics
C. Efficiency
D. Braking - Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?
A. Starting characteristics
B. Operating speed
C. Horse power
D. Speed control - _______________has the least value of starting torque to full load torque ratio?
A. D.C. shunt motor
B. D.C. series motor
C. Squirrel cage induction motor
D. Slip ring induction motor - In case of _______________ speed control by injecting e.m.f. in the rotor circuit is possible?
A. d.c. shunt motor
B. schrage motor
C. synchronous motor
D. slip ring induction motor - In which of the following applications variable speed operation is preferred ?
A. Exhaust fan
B. Ceiling fan
C. Refrigerator
D. Water pump - The travelling speed of cranes varies from_________________?
A. 20 to 30 m/s
B. 10 to 15 m/s
C. 5 to 10 m/s
D. 1 to 2.5 m/s
