Practice Test: Question Set - 05
1. Which part of a motor needs maximum attention for maintenance?
- (A) Frame
- (B) Rearing
- (C) Stator
winding
- (D) Rotor
winding
2. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance?
- (A) Running
characteristics
- (B) Starting
characteristics
- (C) Efficiency
- (D) Braking
3. The selection of an electric motor for any application depends on which of the following factors?
- (A) Electrical
characteristics
- (B) Mechanical
characteristics
- (C) Size
and rating of motors
- (D) All
of the above
4. ________ need frequent starting and stopping of electric motors,
- (A) Paper mills
- (B) Grinding
mills
- (C) Air-conditioners
- (D) Lifts and
hoists
5. Rotor of a motor is usually supported on _________ bearings.
- (A) Ball or
roller
- (B) Needle
- (C) Bush
- (D) Thrust
6. In _________ method of staging three phase induction motors the starting voltage is not reduced.
- (A) Autotransformer
- (B) Star-delta
- (C) Slip ring
- (D) Any of the
above
7. Heavy duty cranes are used in
- (A) Ore handling
plants
- (B) Steel plants
- (C) Heavy
engineering workshops
- (D) All of the
above
8. A wound rotor induction motor is preferred, as compared to squirrel cage induction motor, when major consideration is
- (A) Slop speed
operation
- (B) High
starting torque
- (C) Low windage
losses
- (D) All of the
above
9. Is preferred for automatic drives.
- (A) Squirrel
cage induction motor
- (B) Synchronous
motors
- (C) Ward Leonard
controlled D.C. motors
- (D) Any of the
above
10. In series motor which of the following methods can be used for changing the flux per pole?
- (A) Tapped field
control
- (B) Diverter
field control
- (C) Series-parallel
control
- (D) Any of the
above
Next Tests: