Test: Power Electronics & Drives- 2 - Electrical Engineering (EE) MCQ

# Test: Power Electronics & Drives- 2 - Electrical Engineering (EE) MCQ

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## 20 Questions MCQ Test - Test: Power Electronics & Drives- 2

Test: Power Electronics & Drives- 2 for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Power Electronics & Drives- 2 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Power Electronics & Drives- 2 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Power Electronics & Drives- 2 below.
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Test: Power Electronics & Drives- 2 - Question 1

### A 6-phase bridge-converter feeds a purely resistive load. The  delay angle α is measured from the point of naturalcommutation. The effective control of voltage can be obtained  when α lies in the range

Detailed Solution for Test: Power Electronics & Drives- 2 - Question 1

Refer 12-pulse bridge converter which
would behave as 6-phase bridge converter

Test: Power Electronics & Drives- 2 - Question 2

### A 3-phase cycloconverter is used to obtain  a variable frequency single-phase a.c. output. The single phase a.c. load  is 220 V, 60 A at a power factor of 0.6 lagging. The  rms value  of input voltage per phase required is

Detailed Solution for Test: Power Electronics & Drives- 2 - Question 2

Test: Power Electronics & Drives- 2 - Question 3

### In the below given circuit, the FD (Freewheeling diode) is forward biased at ωt =

Detailed Solution for Test: Power Electronics & Drives- 2 - Question 3

It is forward biased at π by the conducting SCR & the current starts to through the FD & Load.

Test: Power Electronics & Drives- 2 - Question 4

A d.c. source is switched in steps to synthesize the three-phase  output. The basic three-phase bridge inverter can be  controlled. The angle through which each switch conducts and  at any instant the number of switches conducting  simultaneously are, respectively

Test: Power Electronics & Drives- 2 - Question 5

For a single-phase, full-bridge inverter supplying power to a  highly inductive load  as shown below, the correct sequence of operation of switches and diodes is

Test: Power Electronics & Drives- 2 - Question 6

single-phase, half-bridge inverter has input voltage of 48 V DC. Inverter is feeding a load of 2.4Ω. The r.m.s. output voltage at fundamental frequency is

Detailed Solution for Test: Power Electronics & Drives- 2 - Question 6

Test: Power Electronics & Drives- 2 - Question 7

A boost-regulator has an input volage of 5V and the average output voltage of 15V. The duty cycle is

Detailed Solution for Test: Power Electronics & Drives- 2 - Question 7

Boost regulator is a step-up chopper

Test: Power Electronics & Drives- 2 - Question 8

Which one of the following statements is The turn off times of converter grade SCRs are normally in  the range of

Test: Power Electronics & Drives- 2 - Question 9

Which one of the following statements is

A Triac is a

Test: Power Electronics & Drives- 2 - Question 10

Which one of the following is correct?

In a switched capacitor network for VAR compensation the SCRs are commutated by

Test: Power Electronics & Drives- 2 - Question 11

Which one of the following shows current fold back  characteristics curve for a SCR controlled shunt regulated  power supply?

Test: Power Electronics & Drives- 2 - Question 12

Which one of the following statements is correct? In a transistor, the reverse saturation current ICO

Test: Power Electronics & Drives- 2 - Question 13

Which one of the following statements is correct. In a thyristor, the holding current IH  is

Detailed Solution for Test: Power Electronics & Drives- 2 - Question 13

IL = 2 to 3 times IH

Test: Power Electronics & Drives- 2 - Question 14

Which one of the following statements is correct ? For a SCR, dv/dt protection is achieved through the use of

Test: Power Electronics & Drives- 2 - Question 15

In the buck-boost converter, what is the maximum value of the switch utilization - factor?

Test: Power Electronics & Drives- 2 - Question 16

Which one of the following statements is correct?

In order to get best results per unit cost, the heat sinks on which the thyristors are mounted, are made of

Test: Power Electronics & Drives- 2 - Question 17

Which one of the following is used as the main switching element in a switched mode power supply operating in 20 kHz to 100 kHz range?

Detailed Solution for Test: Power Electronics & Drives- 2 - Question 17

MOSFET has lowest switching losses and
operates at high frequencies (~KHz range).

Test: Power Electronics & Drives- 2 - Question 18

A converter which can operate both in 3-pulse and 6-pulse modes is a

Detailed Solution for Test: Power Electronics & Drives- 2 - Question 18

A 3-phase semiconverter has the unique
feature of working as a six-pulse converter
for α < 60° and as a three-pulse converter
for α ≥ 60°.

Test: Power Electronics & Drives- 2 - Question 19

A gate turn off (GTO) thyristor has capacity to

Test: Power Electronics & Drives- 2 - Question 20

Match List-I (Limiting factor) with List-II (Safe Operating Area Portion) and select the correct answer using the codes given below the lists:

List-I

A. The peak voltage limit
B. Secondary breakdown limit
C. Power dissipation limit
D. Peak current limit

List-II

1. PQ
2. QR
3. RS
4. ST

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