T10 QUIZ Some important Question

Q:-1 Is the starting torque of a single phase induction motor zero?

Ans:- Yes, the staring torque of a single phase induction motor is zero

Q2:- Is the torque developed by a single phase induction motor at synchronous speed zero

Ans:- No, it is negative

Q3:- Can a repulsion induction motor ever run at super synchronous speed?

Ans:-Yes , at no load

Q4:- Name a small size synchronous motor that abviates the need for dc excitation.

Ans:- Reluctance motor

Q5:- Why the reluctance motor have low efficiency?

Ans:- Because of varying reluctance.

Q6:- What is stepper motor?

Ans:- A motor in which the rotor turns in discrete movements is called a stepper motor.

Q7:- where the stepper motor is used?

Ans :- Stepper motor are used in industrial situations which cal for precise positioning of an object or precise control of speed without having to resort to closed-loop feedback.

Q8:- How can the direction of rotation of a universal motor be reversed ?

Ans:- Reversed by Reversing either the field or armature leads, but not both

Q9:-Name of the motor is used in ceiling fan?

Ans:- split phase permanent capacitor motor.

Q10:- What happens to the speed and power factor of a single phase series motor when the load increases?

Ans:- when load increases on the single phase induction motor the speed and the power factor both decrease with the increase in load.