Electrical Engineering Mcqs Practice Test

Question 1

Electric pressure is also called________?

Accepted Answer

C. voltage

Question 2

The size of poxvirus is_______________?

Accepted Answer

D. 300 nm

Question 3

Kingdom Protoctista includes_______________?

Accepted Answer

B. Unicellular organisms

Question 4

In a push – pull converter, the filter capacitor can be obtained as____________?

Accepted Answer

C. Cmin= ( 1 – 2 D ) V / 32 ( Vr L f2 )

Question 5

MOSFET stands for______________?

Accepted Answer

Metal – oxide semiconductor field effect transistor

Question 6

In a flyback converter, the inductor of the buck-boost converter has been replaced by a_____________?

Accepted Answer

C. Flyback transformer

Question 7

Advantages of Cuk converter is / are_____________?

Accepted Answer

D. None of these

Question 8

A MOSFET, for its conduction uses_____________?

Accepted Answer

B. Only majority carriers

Question 9

An RC snubber network used in BJT__________?

Accepted Answer

D. All of these

Question 10

The ac output voltage waveform of VSI and AC output current waveform of CSI respectively is composed of___________?

Accepted Answer

D. High dv / dt, high di / dt

Question 11

If energy is taken from the AC side of the inverter and sends it back into the DC side, then it is known as___________?

Accepted Answer

C. Regenerative mode operation

Question 12

A combination of synchronized leading edge and trailing edge modulation has also been used to control a____________?

Accepted Answer

C. Both A. and B.

Question 13

Regulator sampling PWM is usually used in___________?

Accepted Answer

D. Only A. and B.

Question 14

In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________?

Accepted Answer

B. Odd multiple of three

Question 15

In square wave operation mode of 3 phase VSI, the VSI

Accepted Answer

C. Cannot control the load voltage except by means of dc link voltage

Question 16

For commutation in three phase PAC, normally balanced three phase voltages VR, VY and VB are connected to the three legs of the converter via______________?

Accepted Answer

A. Three inductances

Question 17

If all the SCR’s of 3 phase PAC is replaced by diodes, they would be triggered_____________?

Accepted Answer

B. 60 degree after the zero crossing of the corresponding line voltages

Question 18

The ability of an electronic system to function properly in its intended electromagnetic environment and should not be a source of pollution to that electromagnetic environment is known as____________?

Accepted Answer

D. Electromagnetic compatibility

Question 19

The opposite of susceptibility is___________?

Accepted Answer

A. Immunity

Question 20

The output current in PWM DC – DC converters is equal to___________?

Accepted Answer

C. Either A. or B.