quiz on no load and blocked rotor test

No load test of 3-phase induction motor used to determine

• Variable loss

• Constant loss

• Hysteresis loss only

• Eddy current loss only

Blocked rotor test in an induction motor is used to determine

• Leakage impedance

• Copper loss

• both a and b

• None of the above

Which of the following losses are negligible in blocked rotor test?

• Mechanical losses

• Iron losses

• Both 1 & 2

• None of the above

Wattmeter reading in no-load test of induction motor gives

• Copper losses in the stator

• Friction and winding losses

• Sum of (a) and (b) above

  d

• Total losses in the rotor on no load

The complete circuit diagram of a 3-phase induction motor can be drawn with the help of

• Block rotor test alone

• Running-light and blocked-rotor and stator-resistance tests

• Both running-light and blocked-rotor tests

• Running-light test alone

If synchronous speed is 1500 Rpm , What is the speed of Induction motor ?

• 1450 RPM

• 1500 RPM

• 1600 RPM

• NONE OF THE ABOVE

Induction motor operated at synchronous speed

• TRUE

• FALSE

• CANT SAY

• NONE OF THE ABOVE

At no load , Input power is converted to

• losses

• output power

• none of the above