ALTERNATOR 4

A detailed illustration of an alternator with labeled parts and a background of electrical schematics, showcasing its fun<wbr>ction and importance in power generation.

Master Your Alternator Knowledge

Test your understanding of alternators with this comprehensive quiz designed for electrical engineering enthusiasts. Whether you're a student, teacher, or simply passionate about power systems, this quiz challenges you to apply your knowledge effectively.

Key Features:

10 thought-provoking questions
Multiple-choice format for clarity
Instant feedback on your answers

10 Questions2 MinutesCreated by GeneratingWave45

31. The power drawn by the prime-mover of an alternator, under no-load conditions, goes to ___________

Meet copper losses both in armature and rotor windings

Produce power in armature

Meet no-load losses

produce e.m.f. In armature winding

32. Overheating of generator’s winding ______________

Reduces life of the machine

Does not have any significant effect

Reduces generated voltage

Reduces power factor

33. The regulation of an alternator is likely to be negative in case of ____________

Lagging power factor of the load

Leading power factor of the load

High speed alternators

Low speed alternators

34. Two alternators are to be put in parallel. Which of the following factors should be identical for both?

Frequency

Phase sequence

Voltage

All of the above

35. An alternator driven by a Francis hydraulic turbine is a _________ alternator

Low speed

Medium speeed

High speed

Low or medium speed

36. The distribution factor, in alternators, is defined as the ratio of e.m.fs. of __________

Distribution winding to full pitch winding

concentrated winding to distributed winding

Distributed winding to concentrated winding

Full pitch winding to distributed winding

37. When an alternator is supplying unity power factor load, the armature reaction will produce ____________

Distortion of the main field

Magnetisation of the main field

Demagnetisation of the main field

None of the above

38. In an alternator, when the load power factor is unity ____________

The armature flux will be demagnetizing

The armature flux will be crosss magnetizing

The armature flux will reduce to zero

The armature flux will have square wave form

39. Three-phase alternators are invariable star-connected because __________

Higher terminal voltage is obtained

Less turns of wire are required

Small conductors can be used

Magnetic losses are the minimum

40. Which of the following conditions does not have to be met by alternators working in parallel?

Alternators must operate at the same frequency

Machine must have the same phase rotation

The terminal voltage of each machine must be the same

The machines must have equal kVA ratings

ALTERNATOR 4

Master Your Alternator Knowledge

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