DC Generator MCQ

DC Generator MCQ

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  • 05th May, 2021

DC Generator MCQ Questions

Take DC Generator MCQ Quiz & Online Test to Test your knowledge

We have listed below the best DC Generator MCQ Questions that check your basic knowledge of DC Generator. This DC Generator MCQ Test contains 25 best multiple choices questions. You have to select the right answer to every question. You can also download here the DC Generator MCQ PDF.

What is DC Generator?

The DC Generator is a type of machine, that is used to convert mechanical energy into electrical energy. It is generally called the DC machine. The essential parts of DC Generators are Stator, Rotor, Armature windings, Yoke, Poles, Pole Shoe, Commutator, and Brushes. Finally, the DC Generator generally works on the principle of Faraday’s law of electromagnetic induction.

Types of DC Generators:

Mainly, there are 2 types of DC Generator:

  1. Separately Excited
  2. Self Excited

Uses of DC Generators:

  • DC Generators are used for the purpose of lights & Powers.
  • It is used for arc lamps, stable current generators, and boosters.
  • It is also used for the power supply for schools, colleges, banks, hostels, and offices, etc.

DC Generator MCQ Question and Answer

1) A D.C. welding generator has _____________ .

  • A. Wave moving
  • B.Lap winding
  • C.Duplex winding
  • D.All of the above

2) In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when ________________ .

  • A. The generator runs on full load
  • B.There is no load on the generator
  • C.The generator runs on overload
  • D.The generator runs on designed speed

3) When two D.C. generators are running in parallel an equalizer bar is used So that the two identical machines will pass approximately equal currents to the load.

  • A. True
  • B.False

4) The armature of DC generator is laminated to ______________ .

  • A. Reduce Hysteresis loss
  • B.Insulate the Core
  • C.Reduce eddy current loss
  • D.Provide air cooling passage

5) In D.C. generators, lap winding is used for __________________ .

  • A. High voltage, high current
  • B.High voltage, low current
  • C.Low voltage, high current
  • D.Low voltage, low current
Download Free : DC Generator MCQ PDF

6) which of the following regulation is preferred With a D.C. generator ?

  • A. 100% regulation
  • B.1% regulation
  • C.50% regulation
  • D.Infinite regulation

7) What is full load terminal voltage In a level compounded D.C. generator ?

  • A. Equal to no-load terminal voltage
  • B.Negligibly low
  • C.More than no-load terminal voltage
  • D.Less than no-load terminal voltage

8) The resistance of armature winding depends on which of the following ?

  • A. Cross-sectional area of the conductor
  • B.Length of conductor
  • C.Number of conductors
  • D.All of the above

9) In a four-pole D.C. machine Alternate poles are north and south.

  • A. true
  • B.false

10) In a commutator _________________ .

  • A. mica and copper are equally hard
  • B.Copper is harder than mica
  • C.mica is harder than copper
  • D.none of the above

11) We connect two generators in parallel For large DC load.

  • A. true
  • B.false

12) Thy yoke of a dc generator is made of cast iron because _________________ .

  • A. It is cheaper
  • B.It gives mechanical protection to the machine
  • C.It completes the magnetic path
  • D.All of these

13) The bearings used to support the rotor shofts are generally ________________________ .

  • A. bush bearings
  • B.magnetic bearings
  • C.needle bearings
  • D.ball bearings

14) In case of D.C. machines, mechanical lossess are primary function of -

  • A. Current
  • B.Voltage
  • C.Speed
  • D.none+

15) Brushes of D.C. Machines are made of which of the followings ?

  • A. Carbon
  • B.Soft Copper
  • C.hard copper
  • D.all of the above

16) The Material of Commutator brushes is generally made of __________ .

  • A. Mica
  • B.Copper
  • C.Cost Iron
  • D.Carbon

17) A D.C. generator without commutator is a AC generator.

  • A. true
  • B.false

18) Equalizer rings are used in wave winding.

  • A. true
  • B.false

19) Fleming's right hand rule is applicable to __________________ .

  • A. D.C. Motor
  • B.Transformer
  • C.D.C. Generator
  • D.Altenator

20) A Triplex wave winding will have _________ Parallel Paths.

  • A. 2
  • B.4
  • C.6
  • D.8

21) When two dc series motors are connected in parallel the resultant speed is ...............

  • A. Zero
  • B.Normal speed
  • C.Less than the normal speed
  • D.More than the normal speed

22) Nowadays dc motor is widely used in .............

  • A. Pumping sets
  • B.Machine shops
  • C.Electric traction
  • D.Air compressors

23) The field coils of D.C. generator are usually made of ............

  • A. Mica
  • B.Carbon
  • C.Copper
  • D.Cast iron

24) In a D.C. generator the critical resistance can be increased by .................

  • A. Decreasing its speed
  • B.Increasing its speed
  • C.Decreasing its field resistance
  • D.None of above

25) Welding generator will have ............

  • A. Lap winding
  • B.Delta winding
  • C.Wave winding
  • D.None of above

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