Power Electronics MCQs with answers Page - 13

Here, you will find a collection of MCQ questions on Power Electronics. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. In sinusoidal PWM for inverters the width of different pulses are not the same.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

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Q. The symbol in figure is for

  • (A) UJT
  • (B) PUT
  • (C) SCS
  • (D) SBS

A

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Q. Mc Murray full bridge inverter uses

  • (A) 4 thyristors and 2 diodes
  • (B) 4 thyristors and 4 diodes
  • (C) 8 thyristors and 4 diodes
  • (D) 8 thyristors and 8 diodes

A

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Q. In a 3 phase full converter, the instantaneous output voltage can have negative part if

  • (A) firing angle is less than 60°
  • (B) firing angle is less than 90°
  • (C) firing angle is more than 60°
  • (D) firing angle is more than 90°

A

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Q. The circuit in figure is for

  • (A) resonant commutation
  • (B) line commutation
  • (C) auxiliary commutation
  • (D) complementary commutation

A

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Q. The main utility of SCR is due to

  • (A) gate triggering
  • (B) high temperature triggering
  • (C) triggering
  • (D) high breakdown voltage

A

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Q. he circuit in figure is for

  • (A) resonant commutation
  • (B) self commutation
  • (C) load commutation
  • (D) auxiliary commutation

A

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Q. A single phase half bridge inverter required to feed R-L loads needs

  • (A) 2 thyristors
  • (B) 4 thyristors
  • (C) 2 thyristors and two diodes
  • (D) 4 thyristors and 4 diodes

A

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Q. In a single phase semi-converter the number of thyristors is

  • (A) 16
  • (B) 8
  • (C) 4
  • (D) 2

A

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Q. Which of these commutation methods uses two leads?

  • (A) Class A
  • (B) Class B
  • (C) Class C
  • (D) Class D

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