Rectifiers and Converters Mcqs

This set of Electrical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “Rectifiers and Converters”. These questions are chosen from a collection of most authoritative and best reference books on Electrical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Rectifiers and Converters Mcqs comprehensively.

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1.
Which of the following methods may be used to convert A.C. system to D.C ?

Rectifiers

Motor converters

Motor-generator sets

Rotary converters

All of the above

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2.
A synchronous converter can be started______________?

By means of a small auxiliary motor

From AC. side as induction motor

From D.C. side as D.C. motor

Any of the above methods

Answer Discus (0)

3.
Which of the following are the applications of D.C. system ?

Battery charging work

Arc welding

Electrolytic and electro-chemical processes

Arc lamps for search lights

All of the above

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5.
A rotary converter combines the function of____________?

An induction motor and a D.C. generator

A synchronous motor and a D.C. generator

A D.C. series motor and a D.C. generator

None of the above

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6.
With a motor converter it is possible to obtain D.C. voltage only upto__________?

200-100 V

600—800 V

1000—1200 V

1700—2000 V

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7.
Which of the following is reversible in action ?

Motor generator set

Motor converter

Rotary converter

Any of the above

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8.
A rotary converter is a single machine with______________?

One armature and one field

Two armatures and one field

One armature and two fields

None of the above

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9.
A rotary converter in general construction and design, is more or less like___________?

A transformer

An induction motor

An alternator

Any D.C. machine

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10.
Which of the following metals is generally manufactured by electrolysis process ?

Load

Aluminium

Copper

Zinc

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11.
Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required ?

Motor-generator set

Motor converter

Rotary converter

Mercury arc rectifier

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12.
A rotary converter operates at a______________?

Low power factor

High power factor

Zero power factor

None of the above

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13.
In a rotary converter armature currents are______________?

D.c. only

A.c. only

Partly a.c. and partly d.c.

None of the above

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14.
In which of the following appUcations, direct current is absolutely essential ?

Illumination

Electrolysis

Variable speed operation

Traction

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15.
In a mercury arc rectifier positive ions are attracted towards______________?

Anode

Cathode

Shell bottom

Mercury pool

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