AC THREE PHASE MOTOR - Practice Mode

1) Which formula is used to calculate the total electrical degree in stator of an A.C motor?

Total electrical degree = 180 Degree / No. of slots Total electrical degree = 180 Degree x No. of slots Total electrical degree = 180 Degree / No. of poles Total electrical degree = 180 Degree x No. of poles

Correct Answer: Total electrical degree = 180 Degree x No. of poles

Explanation:

2) What is the fuse rate to run a 10 HP three phase induction motor at full load?

10:00 AM 15 A 25 A 30 A

Correct Answer: 25 A

3) What is the phase displacement between windings in 3 phase motor?

90 Degree 120 Degree 180 Degree 360 Degree

Correct Answer: 120 Degree

4) Which speed is called as synchronous speed in 3 phase induction motor?

No load speed Full load speed Rotating magnetic field speed Relative speed between stator and rotor

Correct Answer: Rotating magnetic field speed

5) What is the electrical degree of 6 pole stator of motor?

360 Degree 720 Degree 1080 Degree 1440 Degree

Correct Answer: 1080 Degree

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