Test: Power Electronics - 5


25 Questions MCQ Test Power Electronics | Test: Power Electronics - 5


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Attempt Test: Power Electronics - 5 | 25 questions in 25 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Power Electronics for Electrical Engineering (EE) Exam | Download free PDF with solutions
QUESTION: 1

Multiphase choppers are used in

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QUESTION: 2

In a single phase converter using a centre tapped transformer and with a highly inductive load, the firing angles is a. Each thyristor conducts for a period

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QUESTION: 3

In a parallel inverter

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QUESTION: 4

A step up chopper can give an output voltage

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QUESTION: 5

The specified maximum junction temperature of thyristors is about

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QUESTION: 6

A bridge type single phase cycloconverter changes the frequency f to f/3. Then one half wave of output contains

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QUESTION: 7

A half bridge inverter

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QUESTION: 8

A 3 phase series inverter has

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QUESTION: 9

In figure, thyristor Th is in off state. When thyristor is turned on, the peak thyristor current can be

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QUESTION: 10

HVDC systems are preferable for only long distances.

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QUESTION: 11

Surge current rating of an SCR is

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QUESTION: 12

Which of the following devices has metal-silicon junction?

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QUESTION: 13

In a single phase full wave converter (M-2 connection) feeding on R-L load the input voltage is v = Vm sin ωt. The expression for rms output voltage is

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QUESTION: 14

A dc chopper is feeding an RLE load. The condition for maximum ripple is

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QUESTION: 15

In a series inverter

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QUESTION: 16

The total number of leads in SUS, SBS and SCS respectively are

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QUESTION: 17

Which of these devices can conduct in both directions?

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QUESTION: 18

Assertion (A): A half wave controlled rectifier has poorer efficiency and higher ripple factor than a full wave controlled rectifier.

Reason (R): The use of a freewheeling diode in half wave controlled rectifier circuit improves the waveform of load current and circuit power factor.

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QUESTION: 19

A 3 phase dual converter consists of

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QUESTION: 20

Which inverter circuit uses coupled inductors?

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QUESTION: 21

When an SCR is in forward blocking mode, the applied voltage

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QUESTION: 22

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

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QUESTION: 23

A class D chopper

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QUESTION: 24

The symbol in figure is for

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QUESTION: 25

The efficiency of a chopper circuit is about

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