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Electrical Engineering MCQs Set 3

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Electrical engineering MCQs for job test and interview preparation, freshers, students, competitive examinations, and more. Electrical Machines, Power Electronics, Electrical Measurement & Units, Utilization of Electrical Energy, Basic Electrical Engineering, Electrical Installation, Power Systems, Testing & Maintenance of Electrical Equipment, and so on are some of the topics covered in these multiple-choice questions.

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Electrical Engineering MCQS Set 3

Electrical engineering MCQs for job test and interview preparation, freshers, students, competitive examinations, and more. Electrical Machines, Power Electronics, Electrical Measurement & Units, Utilization of Electrical Energy, Basic Electrical Engineering, Electrical Installation, Power Systems, Testing & Maintenance of Electrical Equipment, and so on are some of the topics covered in these multiple-choice questions.

1 / 20

Which semiconductor device acts like a diode and two transistor?

2 / 20

What is used to protect the SCR from over current ________________?

3 / 20

Which triggering is the most reliable____________?

4 / 20

Under normal operating condition voltage clamping device offers impedance of_________?

5 / 20

Example of a voltage clamping device______________?

6 / 20

When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?

7 / 20

CB used for over current protection of thyristor operates when the fault current is__________?

8 / 20

Under over voltage condition impedance offered by the voltage clamping device is__________?

9 / 20

Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?

10 / 20

Switching frequency of SITH is____________?

11 / 20

Let of a thyristor Vc1, Vc2, Vc3 are forward break over voltage for gate current Ig1, Ig2, Ig3 respectively. Then________________?

12 / 20

Which of following devices has highest di/dt and dv/dt capability?

13 / 20

Which of the following is disadvantage of fast recovery diodes?

14 / 20

The latching current of GTO should be of order

15 / 20

If the anode current is 800 A, then the amount of current required to turn off the GTO is about____________?

16 / 20

BCT is used for____________?

17 / 20

Leakage current flows through the thyristor in_________?

18 / 20

A power semiconductor may undergo damage due to____________?

19 / 20

The maximum di/dt in a SCR is____________?

20 / 20

Thyristor can be protected from over voltages by using____________?

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