Q1:- The speed of the rotor field of an induction motor
1. is equal to synchronous speed
2.
is equal to motor speed
3.
is equal to zero
4.
none of the above
ANSWER:-1
Q2:- If the full load speed of a 4 pole 3-phase induction
motor is 1440 rpm its speed at half load will be
1. 1460 rpm
2.
1440 rpm
3.
1400 rpm
4.
1000 rpm
ANSWER:-1
Q3:- If the rotor terminals of a 3-phse slip ring induction
motor are not short circuited and the supply is given to the stator the motor
will
1. Not start
2.
Start running
3.
Run at high speed
4.
Run at low speed
ANSWER:-1
Q4:-Generally a 3-phase slipring induction motor is started
with
1. D.O.L. starter
2.
Star delta starter
3.
Auto transformer starter
4.
Stator rotor starter
ANSWER:-4
Q5:- The speed of the squirrel cage
induction motor can be controlled from
1. Stator side
2.
Rotor side
3.
Stator and rotor sides both
4.
Supply voltage side
ANSWER:-1
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