Industrial Drivers Electrical MCQ - Set 01 - ObjectiveBooks

Industrial Drivers Electrical MCQ - Set 01

Practice Test: Question Set - 01

1. The starting torque in case of centrifugal pumps is generally
    (A) Less than running torque
    (B) Same as running torque
    (C) Slightly more than running torque
    (D) Double the running torque

2. The size of an excavator is usually expressed in terms of
    (A) ‘Crowd’ motion
    (B) Angle of swing
    (C) Cubic meters
    (D) Travel in meters

3. In jaw crushers a motor has to often start against ________ load.
    (A) Heavy
    (B) Medium
    (C) Normal
    (D) Low

4. Has relatively wider range of speed control.
    (A) Synchronous motor
    (B) Ship ring induction motor
    (C) Squirrel cage induction motor
    (D) D.C. shunt motor

5. Battery operated scooter for braking uses
    (A) Plugging
    (B) Mechanical braking
    (C) Regenerative braking
    (D) Rheostatic braking

6. A pony motor is used for the starting which of the following motors?
    (A) Squirrel cage induction motor
    (B) Schrage motor
    (C) Synchronous motor
    (D) None of the above

7. By the use of which of the following D.C. can be obtained from AC.?
    (A) Silicon diodes
    (B) Mercury arc rectifier
    (C) Motor generator set
    (D) Any of the above

8. 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

9. For which of the following applications motor has to start with high acceleration?
    (A) Oil expeller
    (B) Floor mill
    (C) Lifts and hoists
    (D) Centrifugal pump

10. The cost of an induction motor will increase as
    (A) Horsepower rating increases but r.p.m. decreases
    (B) Horsepower rating decreases but r.p.m. increases
    (C) Horsepower rating and operating speed increases
    (D) Horsepower rating and operating speed decreases

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