Q1:- Different types of a 3- phase induction motors are
1.
Squirrel cage
2.
Sliping
3.
Commutator
4.
All of the above
ANSWER:- 4
Q2:- The rotor of a 3-phase induction motor always runs at
1. Synchronous speed
2.
Less than synchronous speed
3.
More than synchronous speed
4.
None of these
ANSWER:-2
Q3:- An induction motor in general is analogous to
1. An auto transformer
2.
A two winding
transformer with its secondary open circuit
3.
A two winding transformer with its secondary
winding short circuit
4.
A three winding transformer
ANSWER:-3
Q4:- When 3-phase supply is given to the stator of the motor
a
1. Revolving field is set up
2.
Pulsating field is set up
3.
Revolving field at synchronous speed is set up
4.
revolving field at the rotor speed is set up
ANSWER:-3
Q5:- In a 3-phse squirrel cage induction motor, the
1. rotor conductors are kept open
2.
rotor conductors are short circuited through end
rings
3.
ends of the rotor conductors are connected to
sliping
4.
ends of the rotor conductors are short circuited
through slipped
ANSWER:-2
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