A reluctance motor
needs no D.C. excitation
all of the above
is self-starting
is constant speed motor
all of the above
As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for
sound equipment
fans
blowers
mixer grinders
sound equipment
In a hysteresis motor the rotor must have
none of the above
susceptibility
resistivity
retentivity
retentivity
The rotor of a hysteresis motor is made of
aluminium
cast iron
chrome steel
copper
chrome steel
Which of the following motors has two separate windings on the motor ?
Repulsion induction motor
None of the above
Repulsion start induction run motor
Repulsion motor
Repulsion induction motor
The capacitors used in single-phase capacitor motors have no
polarity marking
dielectric medium
voltage rating
definite value
polarity marking
The electric motor used in portable drills is
repulsion motor
universal motor
capacitor run motor
hysteresis motor
universal motor
Which of the following applications always have some load whenever switched on ?
Pistol drills
Vacuum cleaners
Fan motors
All of the above
Pistol drills
The speed control of universal motor used for sewing machines is by
centrifugal mechanism
tapping the field
friction
varying the resistance
varying the resistance
Torque developed by a single phase induction motor at starting is
pulsating
uniform
nil
none of the above
nil
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