Power Electronics And Drives - MCQ Test 1


10 Questions MCQ Test Mock Test Series for Electrical Engineering (EE) GATE 2020 | Power Electronics And Drives - MCQ Test 1


Description
This mock test of Power Electronics And Drives - MCQ Test 1 for GATE helps you for every GATE entrance exam. This contains 10 Multiple Choice Questions for GATE Power Electronics And Drives - MCQ Test 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Power Electronics And Drives - MCQ Test 1 quiz give you a good mix of easy questions and tough questions. GATE students definitely take this Power Electronics And Drives - MCQ Test 1 exercise for a better result in the exam. You can find other Power Electronics And Drives - MCQ Test 1 extra questions, long questions & short questions for GATE on EduRev as well by searching above.
QUESTION: 1

Match List-I (1-ϕ Rectifier topology - feeding resistive load) with List-II (Average output voltage) and select the correct answer: (α is the firing angle)

Solution:
QUESTION: 2

The latching current in the below circuit is 4 mA. The  minimum width of the gate pulse required to turn on the thyristor is 

Solution:

QUESTION: 3

Match List-I (Waveforms) with List-II (Descriptions) and select the correct answer:

List 1:

A. 

B. 

C. 

D. 

List-II

1. Single phase fully controlled ac to dc converter

2. Voltage commutated dc to dc chopper with input dc voltage E

3. Phase voltage of a three phase inverter with 180° conduction and input dc voltage E

4. Line voltage of a three phase inverter with 120° conduction and input dc voltage E

5. Three-phase diode bridge rectifier 

 

 

Solution:
QUESTION: 4

A single phase ac voltage controller  feeding a pure resistance  load has a load voltage of 200 V(rms) when fed from a source  of 250 V(rms). The input power factor of the controller is  

Solution:

QUESTION: 5

In a thyristor-controlled rectifier, the firing  angle of thyristor  is to be controlled in the range of  

Solution:
QUESTION: 6

A 3-phase wound rotor induction motor is controlled by a  chopper-controlled resistance in its rotor circuit. A resistance  of 2Ω is connected in the rotor circuit and a resistance of 4Ω is additionally  connected during OFF periods of the chopper.  The OFF period of the chopper is 4 ms. The average  resistance in the rotor  circuit for the chopper frequency of   200 Hz is  

Solution:

Chopper frequency = 200 Hz
Time period of chopper (T) = 1/200 = 5 ms

Chopper OFF period = 4 ms

QUESTION: 7

The most suitable device for high frequency inversion in  SMPS is  

Solution:

MOSFETs have the lowest switching
losses so they are the most suitable devices
for the SMPS.

QUESTION: 8

In a self-controlled synchronous motor fed from a variable frequency inverter

Solution:
QUESTION: 9

in case of voltage source inverter, freewheeling diode can be avoided for the load of

Solution:
QUESTION: 10

A single-phase full-bridge converter with a free-wheeling  diode feeds an inductive load. The load resistance is 15.53Ω and it has a large inductance providing constant and ripple  free d.c. current. Input to converter is from an ideal 230V,  50Hz single phase source. For a firing delay  angle of 60°, the  average value of diode current is  

Solution:

V0 for a single-phase full-bridge converter
with a free-wheeling diode