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For the following questions answer them individually
A centrifugal switch is provided for disconnecting the auxiliary winding in a .........
Capacitor - start motor
Capacitor run motor
Reluctance motor
Hysteresis motor
In a split phase motor, the running winding should have .........
high resistance and low inductance
low resistance and high inductance
high resistance as well as high inductance
low resistance as well as low inductance
A reluctance motor
is self-starting
is constant speed motor
needs no D.C. excitation
all options are correct
The speed control of a universal motor used for sewing machinesis done by. ...........
friction
varying the resistance
tapping the field
centrifugal mechanism
The power factor of a single-phase induction motor is usually ............
lagging
always leading
unity
unity to 0.8 leading
Hysteresis motors are suitable for. ........
fans
blowers
sound equipment
mixer grinders
A relay used on short transmission lines is ............
reactance relay
mho’s relay
impedance relay
None of these
The highest voltage transmission line starting from generating point is called ........
secondary transmission
secondary distribution
primary transmission
primary distribution
A 30 km transmission line carrying power at 33 kV is known as ..........
short transmission line
long transmission line
high power line
ultra high voltage line
The insulating material for cables should be .........
non-hygroscopic
non-inflammable
acid proof
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