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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