A. Synchronous motor
B. D.C. differentially compound motor
C. Ward-Leonard controlled D.C. shunt motor
D. AC. slip ring motor
Related Mcqs:
- 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 - The characteristics of drive for crane hoisting and lowering are which of the following ?
A. Precise control
B. Smooth movement
C. Fast speed control
D. All of the above - The capacity of a crane is expressed in terms of_______________?
A. type of drive
B. span
C. tonnes
D. any of the above - Which of the following motors always starts on load ?
A. Conveyor motor
B. Floor mill motor
C. Fan motor
D. All 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 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 - In squirrel cage induction motors which of the following methods of starting cannot be used ?
A. Resistance in rotor circuit
B. Resistance in stator circuit
C. Auto-transformer starting
D. Star-delta starting - 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 of the following motors has series characteristics ?
A. Shaded pole motor
B. Repulsion motor
C. Capacitor start motor
D. None of the above
