Related Questions

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
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
Randomized quick sort is an extension of quicksort where the pivot is chosen randomly. what is the worst case complexity of sorting a numbers using randomized quick sort?
A O (n)
B O (n2)
C O (n log n)
D O (n!)
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 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 are preferred for overhead traveling cranes?
A Slow speed motors
B Continuous duty motors
C Short time rated motors
D None of the above
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 for boom hoist of a traveling crane?
A Single phase motor
B Synchronous motor
C A.slip ring motor
D Ward-Leonard controlled D.C. shunt motor
Which of the following motors is usually preferred for kiln drives?
A Cascade controlled A.C. motor
B Slip ring induction motor
C Three phase shunt wound commutator motor
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

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