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Electrical Engineering MCQs Set 4

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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 4

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

The typical value of SCR for modern alternator is____________?

2 / 20

A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is _____?

3 / 20

A silicon controlled racitifier (SCR) is a ____________?

4 / 20

If holding current of a thyristor is 2 mA then latching current should be_____?

5 / 20

A single phase full bridge inverter can operated in load commutation mode in case load consist of______?

6 / 20

A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is_____?

7 / 20

For an SCR gate – cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance_____?

8 / 20

A thyristor equivalent of a thyratron tube is a _________?

9 / 20

A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?

10 / 20

In forward blocking mode of a thyristor________?

11 / 20

A Triac is a ______________?

12 / 20

An SCR is considered to be a semi controlled device because_______?

13 / 20

A Triac has three terminals viz ___________?

14 / 20

An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be_____?

15 / 20

Which statement is true for latching current ___________?

16 / 20

In reverse blocking mode of a thyristor______?

17 / 20

A PNPN device having two gates is ___________?

18 / 20

A thyristor is basically________?

19 / 20

The function of snubber circuit connected across the SCR is to___________?

20 / 20

Thyristor can be protected from over voltages by using

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