Related Questions

Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors?
A Low cost
B Wide speed range
C Stability
D High starting torque
Which of the following problem arises in D.C. motors which are fed from thyristor bridge circuits ?
A Increased I R losses
B Increased core losses
C Poor commutation
D Change in motor parameters
E All of the above
In which of the following motors the stator and rotor magnetic field rotate at the same speed ?
A Universal motor
B Synchronous motor
C Induction motor
D Reluctance motor
Which of the following motors is preferred for tape-recorders?
A Shaded pole motor
B Hysteresis motor
C Two value capacitor motor
D Universal motor
Which of the following motors is used in mixies ?
A Repulsion motor
B Reluctance motor
C Hysteresis motor
D Universal motor
Which of the following motors is preferred for traction work?
A Universal motor
B D.C. series motor
C Synchronous motor
D Three-phase induction motor
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
C Synchronous motor
D D.C. motor
Which of the following tests will be suitable for testing two similar D.C. series motors of large capacity?
A Swinburne's test
B Hopkinson's test
C Field test
D Brake test
Which of the following motors is most suitable for signaling devices and many kinds of timers?
A D.C. shunt motor
B D.C. series motor
C Induction motor
D Reluctance motor
Which of the following motors one will choose to drive the rotary compressor?
A D.C. shunt motor
B D.C. series motor
C Universal motor
D Synchronous motor

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