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PRE TEST ON DC GENERATOR - EE - II - UNIT 4

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

DC Generator converts --------------------energy into ----------energy.

a)

mechanical, electrical

b)

electrical, mechanical

c)

kinetic, mechanical

d)

potential, electrical

2.

DC Generators works on the ---------- principle

a)

Lenz's law

b)

Lorentz Law

c)

ohm's law

d)

Faraday's law of ElectromagneticInduction

3.

DC stands for ----------------------------

a)

direct control

b)

division control

c)

division current

d)

direct current

4.

EMF equation for DC generator is -------------

a)

Eg = PΦNZ / 120A

b)

Eg = PΦNZ / 60A

c)

Eg = PΦNA / 60Z

d)

Eg = PΦNZ / 160A

5.

Eg = PΦNZ / 60A what is Z?

a)

Impedance

b)

Armature Conductor

c)

field winding

d)

field coil

6.

The induced current in the DC generator can be found by ---------

a)

Faraday's law

b)

Fleming's Right Hand Rule

c)

Ohm's law

d)

Lowrent'z law

7.

WHICH TYPE OF DC GENERATOR HAS TWO FIELD WINDINGS?

a)

SERIES

b)

SHUNT

c)

COMPOUND

8.

MARK THE LOSSES WHICH OCCURS IN DC GENERATOR

a)

COPPER LOSS

b)

IRON LOSS

c)

STRAY LOSS

d)

MECHANICAL LOSS

9.

EFFICIENCY OF RELIABLE DC GENERATOR

a)

90% - 99%

b)

85% - 95%

c)

50% - 69%

d)

70% - 84%

10.

For Generating large current on D.C generators which winding is generally preferred

a)

Progressive wave winding

b)

Lap Winding

c)

Retrogressive Lap winding

d)

Current depends on design