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.Management Sciences
Category: Industrial Drives
Ward-Leonard controlled D.C. drives are generally used for _____________________ excavators?
A. Light duty
B. Medium duty
C. Heavy duty
D. All of the above
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
Battery operated scooter for braking uses__________________?
A. plugging
B. mechanical braking
C. regenerative braking
D. rheostatic braking
The load cycle for a motor driving a power press will be________________?
A. variable load
B. continuous
C. continuous but periodical
D. intermittent and variable load
In a paper mill where constant speed is required________________?
A. synchronous motors are preferred
B. A.C. motors are preferred
C. individual drive is preferred
D. group drive is preferred
Heat control switches are used in__________________?
A. transformers
B. cooling ranges
C. three phase induction motors
D. single phase
Which of the following motors has series characteristics ?
A. Shaded pole motor
B. Repulsion motor
C. Capacitor start motor
D. None of the above
In which of the following applications variable speed operation is preferred ?
A. Exhaust fan
B. Ceiling fan
C. Refrigerator
D. Water pump
Heavy duty cranes are used in________________?
A. ore handling plants
B. steel plants
C. heavy engineering workshops
D. all of the above
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