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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Electrical Machines  >  Test: Operating Characteristics of DC Generators - Electrical Engineering (EE) MCQ

Test: Operating Characteristics of DC Generators - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Electrical Machines - Test: Operating Characteristics of DC Generators

Test: Operating Characteristics of DC Generators for Electrical Engineering (EE) 2024 is part of Electrical Machines preparation. The Test: Operating Characteristics of DC Generators questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Operating Characteristics of DC Generators MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Operating Characteristics of DC Generators below.
Solutions of Test: Operating Characteristics of DC Generators questions in English are available as part of our Electrical Machines for Electrical Engineering (EE) & Test: Operating Characteristics of DC Generators solutions in Hindi for Electrical Machines course. Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free. Attempt Test: Operating Characteristics of DC Generators | 10 questions in 10 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Electrical Machines for Electrical Engineering (EE) Exam | Download free PDF with solutions
Test: Operating Characteristics of DC Generators - Question 1
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Which of the following characteristics reveal about the magnetization nature of the machine?

Detailed Solution for Test: Operating Characteristics of DC Generators - Question 1

Both no-load as well as load characteristics are required to predict the magnetization of the machine.

Test: Operating Characteristics of DC Generators - Question 2
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Choose the most inappropriate out of the following for the no-load characteristics of the dc generator.

Detailed Solution for Test: Operating Characteristics of DC Generators - Question 2

All the mentioned nature of the characteristics are correct.

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Test: Operating Characteristics of DC Generators - Question 3
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The external characteristic is plotted between

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The external characteristic is plotted between terminal voltage and armature current at fixed excitation. ... Explanation: Armature characteristic is also known as regulation characteristic. It is so called due to the fact that the difference in the terminal voltage helps to determine the voltage deviation.

Characteristics of DC Generators | electricaleasy.com

Test: Operating Characteristics of DC Generators - Question 4
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A student forgot to mark the x-y axes in his experiments but he just noted down the cause and the effect for each. How will he conclude about the armaturecharacteristic out of the all plotted graphs?
Detailed Solution for Test: Operating Characteristics of DC Generators - Question 4

Armature characteristic is observed at constant terminal voltage for emf vs armature current.

Test: Operating Characteristics of DC Generators - Question 5
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Armature characteristic is also known as
Detailed Solution for Test: Operating Characteristics of DC Generators - Question 5

Armature characteristic is also known as regulation characteristic. It is so called due to the fact that the difference in the terminal voltage helps to determine the voltage deviation.

Test: Operating Characteristics of DC Generators - Question 6
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The air gap line represents
Detailed Solution for Test: Operating Characteristics of DC Generators - Question 6

Air gap line in the magnetization curve represents the ideal nature of the machine considering no saturation for the dc machine.

Test: Operating Characteristics of DC Generators - Question 7
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For a given dc generator, the external characteristic is plotted . Without using further plots, how can we obtain internal characteristic?
Detailed Solution for Test: Operating Characteristics of DC Generators - Question 7

To obtain the internal characteristic, you can: 

  1. Add the IaRa drop to the plot
  2. Subtract from E0 the values of voltage drops due to armature reaction for different loads
  3. At large armature current, field current increases sharply to compensate for the voltage drop caused by armature reaction
Test: Operating Characteristics of DC Generators - Question 8
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The voltage drop in terminal voltage from no-load to full load in a shunt generator can be compenated using
Detailed Solution for Test: Operating Characteristics of DC Generators - Question 8

By aiding the series field the armature reaction drop can be compensated.

Test: Operating Characteristics of DC Generators - Question 9
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Why is armature of a dc machine made of silicon steel stampings?
Detailed Solution for Test: Operating Characteristics of DC Generators - Question 9

The silicon steel has very high permeability and makes the flux past consistent. Thereby making lesser losses.

Test: Operating Characteristics of DC Generators - Question 10
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Armature reaction in a generator results in
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