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Rectifiers and Converters MCQs

Free 58+ Rectifiers and Converters MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Practise below with answers and explanations.

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Rectifiers and Converters — MCQs for Pakistan government job tests

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Rectifiers and Converters

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1.Which of the following techniques can be employed to transform an AC system into a DC system?

2.How can a synchronous converter be initiated for operation?

3.Which of the following uses are associated with direct current (D.C.) systems?

4.How many slip rings are present in a single-phase rotary converter?

5.A rotary converter serves as a combination of which two electrical machines?

6.What is the maximum direct current (D.C.) voltage achievable using a motor converter?

7.Which device among the following operates with reversible functionality?

8.What components does a rotary converter consist of in a single machine?

9.In terms of overall design and structure, a rotary converter closely resembles which of the following devices?

10.Which metal is commonly produced through the process of electrolysis?

11.Which device is commonly employed for converting large amounts of alternating current (AC) into direct current (DC)?

12.What type of power factor does a rotary converter typically exhibit during operation?

13.What type of current flows in the armature of a rotary converter?

14.For which of the following applications is the use of direct current (DC) absolutely necessary?

15.In a mercury arc rectifier, which component attracts the positive ions?

16.Which of the following devices requires a direct current power supply?

17.Which type of AC motor is most commonly employed in large motor-generator systems?

18.How do the I²R losses in a rotary converter compare to those in a D.C. generator of identical size?

19.In a mercury arc rectifier, what is the typical voltage drop across the arc per centimeter of its length?

20.Why is mercury selected as the cathode material in arc rectifiers?

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