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Mcqs

DC Machines Mcqs

Our 1000+ DC Machines MCQs (Multiple Choice Questions and Answers) focus on all areas of DC Machines covering 100+ topics. These topics are chosen from a collection of the most authoritative and best reference books on DC Machines. One should spend 1 hour daily practicing these MCQs for 2-3 months to learn and assimilate DC Machines subjects comprehensively. This way of systematic learning will prepare anyone easily for DC Machines exams, contests, online tests, quizzes, MCQ-tests, viva-voce, interviews, and certifications.

 

DC Machines Multiple Choice Questions Highlights

  • 1000+ Multiple Choice Questions & Answers (MCQs) in DC Machines with a detailed explanation of every question.
  • These MCQs cover theoretical concepts, true-false(T/F) statements, fill-in-the-blanks, and match the following style statements.
  • These MCQs also cover numerical as well as diagram-oriented MCQs.
  • These MCQs are organized chapterwise and each Chapter is further organized topicwise.
  • Every MCQ set focuses on a specific topic of a given Chapter in DC Machines Subject.

 

Who should Practice DC Machines MCQs?

  • Students who are preparing for college tests and exams such as mid-term tests and semester tests on DC Machines.
  • Students who are preparing for Online/Offline Tests/Contests in DC Machines.
  • Students who wish to sharpen their knowledge of DC Machines Subject.
  • Anyone preparing for Aptitude test in DC Machines.
  • Anyone preparing for interviews (campus/off-campus interviews, walk-in interviews, and company interviews).
  • Anyone preparing for entrance examinations and other competitive examinations.
  • All - Experienced, Freshers and College / School Students.
Latest Popular
Q:

In a DC machine, rectification process is carried out in order to get unidirectional output (DC). This rectification process is carried out by ______________

A) Half wave rectifier B) Full wave rectifier
C) Mechanical rectification D) Centre tapped rectifier
 
Answer & Explanation Answer: C) Mechanical rectification

Explanation: In a DC machine electronic rectification is not used. Instead they use mechanical rectification with the help of commutator-brush assembly.

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Category: Electronics & Electrical MCQs
Sub Category: DC Machines Mcqs

297
Q:

The angle (electrical) made by brushes with axes of adjoining filed poles is ______________

A) 450 B) 1800
C) 900 D) 300
 
Answer & Explanation Answer: C) 900

Explanation: Brushes in a DC machine are normally placed electrically in the interpolar regions and therefore make an angle of 900 electrical with the axes of adjoining filed poles.

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Category: Electronics & Electrical MCQs
Sub Category: DC Machines Mcqs

207
Q:

Function of yoke is to provide the return path for magnetic flux.

A) True B) false
 
Answer & Explanation Answer: A) True

Explanation: The function of yoke is that it protects the entire machine from dust and dirt. It also provides mechanical support for the magnetic poles. It acts as the return path for the magnetic flux.

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Category: Electronics & Electrical MCQs
Sub Category: DC Machines Mcqs

141
Q:

What are the materials used for brushes in dc machines?

A) Iron B) Carbon
C) Aluminum D) Steel
 
Answer & Explanation Answer: B) Carbon

Explanation: On some extent carbon brush can act as a self-lubricating brush. On moment, polishes the commutator segments. Damage to the commutators is less when copper brushes are used on occurrence of sparkover.

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Category: Electronics & Electrical MCQs
Sub Category: DC Machines Mcqs

135
Q:

Where is field winding mounted in a DC machine?

A) Stator B) Rotor
C) Absent D) Anywhere on stator or rotor
 
Answer & Explanation Answer: A) Stator

Explanation: The field winding (concentrated type) is mounted on salient-poles on the stator and the armature winding (distributed type) is wound in slots on a cylindrical rotor. In AC machines field winding is mounted on rotor.

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Category: Electronics & Electrical MCQs
Sub Category: DC Machines Mcqs

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