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Thyristors - Electric Drives MCQs

Thyristors MCQs : This section focuses on the "Thyristors" in Electric Drives. These Multiple Choice Questions (MCQ) should be practiced to improve the Electric Drives skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

A ______________ is a solid-state semiconductor device with four layers of alternating P- and N-type materials.

A. Transistors
B. Resistive Loads
C. Thyristor
D. None of the above

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Question 2

SCR stands for?

A. source-controlled rectifier
B. silicon-controlled rectifier
C. source-current rectifier
D. silicon-current rectifier

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Question 3

The thyristor is a ________ layered, _______ terminal semiconductor device, with each layer consisting of alternately N-type or P-type material

A. 3, 4
B. 3, 3
C. 4, 4
D. 4, 3

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Question 4

Which blocking mode voltage is applied in the direction that would be blocked by a diode?

A. Forward conducting mode
B. Reverse blocking mode
C. Forward blocking mode
D. All of the above

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Question 5

The silicon controlled rectifier (SCR) or thyristor proposed by William Shockley in ?

A. 1920
B. 1930
C. 1940
D. 1950

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Question 6

For successful commutation circuit turn-off time ______ device turn-off time

A. less than
B. greater than
C. equal to
D. negation

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Question 7

SCR is a __________ device

A. Uncontrolled
B. Fully controlled
C. Semi-controlled
D. Voltage

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Question 8

Which of the following is used to protect SCR from overcurrent?

A. Heat sink
B. Snubber circuit
C. Zener diode
D. Fuse

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Question 9

The value of latching current is more than holding current.

C. Can be true or false
D. can not say

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Question 10

The thyristor has three p-n junctions.

C. Can be true or false
D. can not say

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