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DC GENERATOR 5

Create an image of a D.C. generator with visible components like armature, field windings, and a label indicating electrical engineering concepts, in a bright and educational style.

Master D.C. Generators Quiz

Test your knowledge on D.C. generators with our engaging quiz designed for electrical engineering enthusiasts! This quiz covers various aspects of D.C. generators including types of windings, armature reactions, and efficiency conditions. Perfect for students or professionals looking to solidify their understanding.

10 challenging questions
Multiple-choice format
Immediate feedback on your answers

10 Questions2 MinutesCreated by WindingExpert304

41. For a 4-pole, 2-layer, D.C.lap winding with 20 slots, a number of commutator bars is ____________.

160

42. A 4-pole, 12 slots lap wound D.C.armature has 2 coil sides per slot. Assume progressive winding, the back pitch would be __________.

43. The series field of a short shunt D.C.compound generator is excited by _____ current.

Shunt field

Armature

Load

External

44. In a 12-pole triplex lap-wound D.C.armature, each conductor (parallel path) can carry a current of 100A. The rated current of this armature is ___________.

600A

1200A

2400A

3600A

45. The commercial efficiency of a shunt generator is maximum when its variable loss equals ____________ loss.

Constant

Copper

Iron

Friction and windage

46. In D.C.generators, armature reaction is produced actually by __________.

Its field current

Armature conductors

Field pole winding

Load current in armature

47. In a 6-pole D.C.machine, 90 mechanical degrees correspond to __________ electrical degrees.

180

270

48. For the voltage built-up of a self-excited D.C.generator, which of the following is not an essential condition?

There must be some residual flux

Field winding mmf must aid the residual flux

Total field circuit resistance must be less than the critical value

Armature field must be very high

49. Which of the following D.C.generator cannot build up on open circuit?

Shunt

Series

Short shunt

Long shunt

50. If field resistance of a D.C.shunt generator is increased beyond its critical value, the generator ______________.

Output voltage will exceed its name-plate rating

Will not build up

May burn out if loaded to its name plate rating

. Power output may exceed its name plate rating

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