In split phase motor main winding is of
thick wire placed at the bottom of the slots
thick wire placed at the top of the” slots
thin wire placed at the bottom of the slots
thin wire placed at the top of the slots
thick wire placed at the bottom of the slots
Which of the following motor will give the highest starting torque ?
Schrage motor
Repulsion start and induction run motor
D.C. shunt motor
Universal motor
Schrage motor
Which of the following motors is preferred for tape-recorders ?
Universal motor
Hysteresis motor
Shaded pole motor
Two value capacitor motor
Hysteresis motor
In case of a shaded pole motor the direction of rotation of the motor is
from main pole to shaded pole
from shaded pole to main pole
either of the above depending on voltage
either of the above depending on power factor
from main pole to shaded pole
Which of the following single-phase motors is suitable for timing and control purposes ?
Universal motor
Repulsion motor
Series motor
Reluctance motor
Reluctance motor
Which of the following motors will operate at high power factor ?
Shaped pole motor
Split phase motor
Capacitor run motor
Capacitor start motor
Capacitor run motor
The repulsion-start induction-run motor is used because of
high starting torque
minimum cost
high efficiency
good power factor
high starting torque
A hysteresis motor works on the principle of
hysteresis loss
eddy current loss
magnetisation of rotor
electromagnetic induction
hysteresis loss
In case of high speed universal motor which of the following needs more attention ?
Insulation in rotor
Balancing of rotor
End play
Air gap
Balancing of rotor
The wattage of motor for driving domestic sewing machine will be around
100 to 150 W
40 to 75 W
10 to 30 W
5 to 10 W
100 to 150 W
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