Electrical Machines- II

Electrical Machines- II

University

50 Qs

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Electrical Machines- II

Electrical Machines- II

Assessment

Quiz

Education

University

Practice Problem

Hard

Created by

SYED MOHAMMED ABBAS

Used 3+ times

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50 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the operating principle of an alternator?

Ohm's Law

Lenz's Law

Faraday's Law

Colomb's Law

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

In a power plant, where is the rotor generally placed:

Rotor

Stator

Exciter

Shaf

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which of the following is an advantage of a rotating field system?

Reduces weight of the alternator

Easy insulation of armature winding

Provides better cooling

All of the above

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

A cylindrical rotor alternator is preferred for:

Low speed applications

High speed applications

Medium speed applications

None of the above

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the EMF equation of a power generation?

E=4.44fTΦKdKpE = 4.44 f T \Phi K_d K_p

E=2fTΦE = 2 f T \Phi

E=1.1fTΦE = 1.1 f T \Phi

E=3.14fTΦKdKpE = 3.14 f T \Phi K_d K_p

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Based on the alternator, the relationship between frequency (f), speed (N), and poles (P):

f=NP60f = \frac{N P}{60}

f=60PNf = \frac{60 P}{N}

f=NPf = \frac{N}{P}

f=PNf = \frac{P}{N}

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Pitch factor is used to:

Increase harmonics

Reduce harmonics

Reduce voltage

Increase spread

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