DSSSB JE EE Electrical Machines QUIZ-2

The open circuit test in a transformer gives

The essential condition for parallel operation of two single phase transformers is that they should have the same

Hopkinson’s test for DC motors is conducted on:

In DC Generators, the polarity of interpoles is?

Statement I:

Series DC motors are used for cranes and locomotives.

Statement II:

Series DC motors provide high starting torques, a requisite for such applications.

Wattmeter reading in blocked rotor test of induction motor gives

The maximum starting torque of a 3-phase induction motor occurs when:

Synchronous motors are to be used in situations where

The variation in dc excitation of a synchronous motor causes variation in

An unexcited single phase synchronous motor is called as