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Test: Operating Characteristics Of DC Generators

10 Questions MCQ Test Electrical Machines | Test: Operating Characteristics Of DC Generators

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This mock test of Test: Operating Characteristics Of DC Generators for Electrical Engineering (EE) helps you for every Electrical Engineering (EE) entrance exam. This contains 10 Multiple Choice Questions for Electrical Engineering (EE) Test: Operating Characteristics Of DC Generators (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Operating Characteristics Of DC Generators quiz give you a good mix of easy questions and tough questions. Electrical Engineering (EE) students definitely take this Test: Operating Characteristics Of DC Generators exercise for a better result in the exam. You can find other Test: Operating Characteristics Of DC Generators extra questions, long questions & short questions for Electrical Engineering (EE) on EduRev as well by searching above.
QUESTION: 1

Which of the following characteristics reveal about the magnetization nature of the machine?

Solution:

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

QUESTION: 2

Choose the most inappropriate out of the following for the no-load characteristics of the dc generator.

Solution:

All the mentioned nature of the characteristics are correct.

QUESTION: 3

The external characteristic is plotted between

Solution:

The external characteristic is plotted between terminal voltage and armature current at fixed excitation.

QUESTION: 4

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?

Solution:

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

QUESTION: 5

Armature characteristic is also known as

Solution:

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.

QUESTION: 6

The air gap line represents

Solution:

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

QUESTION: 7

For a given dc generator, the external characteristic is plotted . Without using further plots, how can we obtain internal characteristic?

Solution:

Adding the armature resistance drop we can obtain the external characteristic for a dc generator.

QUESTION: 8

The voltage drop in terminal voltage from no-load to full load in a shunt generator can be compenated using

Solution:

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

QUESTION: 9

Why is armature of a dc machine made of silicon steel stampings?

Solution:

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

QUESTION: 10

Armature reaction in a generator results in

Solution: