What is/are the advantages of parallel operation of alternators?

What is/are the necessary conditions for parallel operation of alternators?

Which of the following relation is correct?

Which of the following motor is not suitable for frequent starting and stopping?

Armature reaction depends on which of the following?

To eliminate the 5th harmonic in the induced voltages their respective pitch factor angle should be

Voltage regulation can be determined by which of the following?

What is the phase difference between two windings of A.C servomotor ?

When pure inductive load is connected to the alternator, what is the effect of armature reaction?

For which of the following loads, armature reaction is magnetizing in nature?

The starting resistance of DC motor is generally

In case of DC Shunt Motor electromagnetic torque developed is

As compared to an induction motor, the air gap in a DC motor is

If the excitation is critical, the power factor of the alternator is

Two windings provided on the stator of 1-phase induction motor, one main winding and the other auxiliary winding are connected

Which of the following motor is suitable for frequent starting and stoppings?

In which of the following, voltage regulation may be zero or negative

For pure resistive load what is the armature reaction?

Interpoles in a DC motor must be

Direct axis reactance is defined as the ratio of

Maximum power developed is depends on

Which of the following voltage regulation method is accurate ?

DC series motors are used

In case the condition for maximum power for DC motor are established, the efficiency of the motor will be

To eliminate 5th harmonic in the induced voltage phase breadth should be

Which of the DC Motor use flywheel?

The current drawn by the armature of DC motor is directly proportional to

Quadrature axis synchronous reactance is the ratio of

A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is

Breadth factor is defined as the ratio of