A. Exhaust fan
B. Ceiling fan
C. Refrigerator
D. Water pump
Industrial Drives
Heavy duty cranes are used in________________?
A. ore handling plants
B. steel plants
C. heavy engineering workshops
D. all 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
___________________is preferred for synthetic fibre mills?
A. Synchronous motor
B. Reluctance motor
C. Series motor
D. Shunt 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
Light duty cranes are used in which of the following ?
A. Power houses
B. Pumping stations
C. Automobile workshops
D. All of the above
Which of the following alternatives will be cheaper ?
A. A 100 H.P. AC. three phase motor
B. Four motors of 25 H.P. each
C. Five motors of 20 H.P. each
D. Ten motors of 10 H.P. each
In which of the following applications the load on motor changes in cyclic order ?
A. Electric shovels
B. Cranes
C. Rolling mills
D. All of the above
Battery operated scooter for braking uses________________?
A. plugging
B. mechanical braking
C. regenerative braking
D. rheostatic braking
Which of the following types of motor enclosure is safest ?
A. Totally enclosed
B. Totally enclosed fan cooled
C. Open type
D. Semi closed
