Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

What Is The Value Of Scr In A 210 Mw Turbo Alternator?

Answer»

SCR = 0.49

SCR = 0.49
Discussion
2.

What Is Short Circuit Ratio (scr) Of A Generator?

Answer»

It is the RATIO of the field current REQUIRED to PRODUCE rated voltage on OPEN circuit to the field current required to circulate rated current on short circuit.

It is the ratio of the field current required to produce rated voltage on open circuit to the field current required to circulate rated current on short circuit.
Discussion
3.

What Are The Losses In A Generator?

Answer»
  1. Stator COPPER
  2. Stator iron
  3. ROTOR copper
  4. WINDAGE LOSS 
  5. Stray loss
  6. Friction loss
Discussion
4.

What Are The Advantages Of Hydrogen Gas As Coolant Over Others?

Answer»
  1. Density is 1/14 of air.
  2. Windage LOSS is low.
  3. Low noise.
  4. Heat TRANSFER co EFFICIENT is 1.5 TIMES HIGHER than air.
  5. Thermal conductivity is 7 times higher than air.
Discussion
5.

What Is The Coolant Used To Cool Rotor Winding?

Answer»

Hydrogen.

Hydrogen.
Discussion
6.

What Is The Coolant Used To Cool Stator Winding?

Answer»

Demineralised WATER

Demineralised water
Discussion
7.

What Is The Efficiency Of A Generator?

Answer»

98.55%

98.55%
Discussion
8.

What Is The Connection Of Winding In A Stator?

Answer»

DOUBLE STAR CONNECTION.

Double star connection.
Discussion
9.

In A Generator With 2 Pole, And Speed 3000 Rpm, What Is The Frequency Of The Induced Emf ?

Answer»

F = PN/120

= 2 X 3000/120

= 50 HZ.

F = PN/120

= 2 x 3000/120

= 50 Hz.
Discussion
10.

What Is The Relation Between The Frequency, Pole And Speed Of A Generator?

Answer»

<P>F = PN/120 HZ

  Where P is the No.of Poles

N is the Speed in RPM.

F = PN/120 Hz

  Where P is the No.of Poles

N is the Speed in RPM.
Discussion
11.

What Are The Advantages Of Stationary Armature And Rotating Field In An Ac Generator?

Answer»
  1. It is easy to take output from the STATIONARY armature.
  2. It is easier to INSULATE stationary armature for higher voltage.
  3. Low voltage excitation SUPPLY can be easily supplied to the rotor through slip rings.
Discussion
12.

What Is The Main Difference Between An Ac Generator And Dc Generator?

Answer»

In an AC GENERATOR the field is rotating and the armature is STATIONARY whereas in DC Generator the field is stationary and the armature is rotating.

In an AC Generator the field is rotating and the armature is stationary whereas in DC Generator the field is stationary and the armature is rotating.
Discussion
13.

What Are The Two Main Parts Of An Ac Generator?

Answer»
  1. STATOR
  2. ROTOR
Discussion
14.

What Are Faraday's Laws Of Electro Magnetic Induction?

Answer»

FIRST LAW: WHENEVER a conductor cuts MAGNETIC flux and E.M.F is induced in that conductor.

Second Law: The magnitude of the induced e.m.f. is equal to the rate of change of flux linkage.

First Law: Whenever a conductor cuts magnetic flux and E.M.F is induced in that conductor.

Second Law: The magnitude of the induced e.m.f. is equal to the rate of change of flux linkage.
Discussion
15.

On Which Principle A Generator Works?

Answer»

Generator works on FARADAYS laws of “ELECTRO MAGNETIC INDUCTION ”

Generator works on Faradays laws of “Electro Magnetic Induction ”
Discussion
16.

What Is A Generator?

Answer»

A Generator is a machine which CONVERTS MECHANICAL ENERGY into Electrical Energy.

A Generator is a machine which converts Mechanical Energy into Electrical Energy.
Discussion
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