Electrical Machines
Reversing the direction of rotation of split phase motors is done by

All of these
 interchanging the capacitor from starting winding to main winding or vice versa.
 reversing the terminals of starting winding.
 reversing the terminals of main winding.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will

 increase to 1.25 times 220 V
 increase to value lying between 220 V and 1.25 times 220 V
 increase to a value greater than 1.25 times 220 V
 not change and remain at 220 V

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Two 3-phase AC generators are such that one has twice the linear dimensions of the other. The field windings of each are excited to give identical sinusoidal air-gap flux density waveform. Both have the same number of stator slots and identical winding patterns. The conductor/slot in a big generator is K times that of the smaller one. The value of K to get equal no load voltage at same frequency is

 4.
 1/4.
 8.
  1/2.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The 3 - Φ induction motors are, by a very considerable margin, the most widely used AC motors as

  they have maximum efficiency and maximum starting torque.
  these are cheaper in cost, simple and rugged in construction.
  they are capable of operation under range of leading and lagging pf.
  they have very good speed regulation.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines