BARC EE : Electrical Machines Quiz-2

A synchronous motor is operated from a bus voltage of 1.0 pu and is drawing 1.0 pu zero power factor leading current. Its synchronous reactance is 0.5 pu What is the excitation emf of the motor?

A slip test is conducted on a synchronous generator to determine:

If a synchronous motor is running at a leading power factor, its excitation induced voltage (E_f) is:

The stator of a three-phase, 4-pole alternator accommodates a single-layer three-phase winding in 36 slots. If the coil span of the winding is 120 electrical degrees, then the distribution factor is:

A three-phase synchronous motor draws 200 A from the line at power factor at rated load. Considering the same line voltage and load, the line current at a power factor of 0.5 leading is

As the load on a synchronous motor is increased, the torque angle:-

What is the ratio of No-load speed to full load speed of a 200 kVA, 12 pole, 220V, 3 phase, 60 Hz synchronous motor?

A 3 phase 10 –pole star connected alternator runs at 600 rpm. It has 140 slots with 10 conductor per slot. The slot harmonics may be of order?

Zero power factor method of an alternator is used to find its.

What is the maximum speed of 60 Hz alternator?