# DC/AC Conversion MCQ Questions & Answers

DC/AC Conversion MCQs : This section focuses on the "DC/AC Conversion". These Multiple Choice Questions (MCQs) should be practiced to improve the DC/AC Conversion skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

Calculate power absorbed by 10 ? load in 3-? 180° VSI if the value of DC supply is 36 V.

A. 20.6 W
B. 24.5 W
C. 26.4 W
D. 28.8 W

Question 2

Calculate power absorbed by 5 ? load in 3-? 120° VSI if the value of DC supply is 16 V.

A. 17.06 W
B. 15.15 W
C. 18.25 W
D. 19.26 W

Question 3

Calculate the line voltage for 3-? 120° VSI if the value of DC supply is 24 V.

A. 16.52 V
B. 16.97 V
C. 12.96 V
D. 12.48 V

Question 4

Calculate the line voltage for 3-? 180° VSI if the value of DC supply is 22 V.

A. 18.52 V
B. 18.12 V
C. 17.96 V
D. 15.48 V

Question 5

Calculate the phase voltage for 3-? 120° VSI if the value of DC supply is 26 V.

A. 10.52 V
B. 10.97 V
C. 10.96 V
D. 10.61 V

Question 6

Calculate the phase voltage for 3-? 180° VSI if the value of DC supply is 20 V.

A. 9.40 V
B. 9.42 V
C. 9.18 V
D. 9.78 V

Question 7

Full form of CSI is ___________

A. Counter source inverter
B. Counter severe inverter
C. Current source inverter
D. Current severe inverter

Question 8

Full form of VSI is ___________

A. Voltage source inverter
B. Volume source inverter
C. Voltage severe inverter
D. Voltage source inserter

Question 9

Inverters are used to convert DC power into variable AC power.

A. True
B. False

Question 10

Number of switches turned on in 3-phase 120° VSI at a single time are __________

A. 2
B. 4
C. 5
D. 3

Question 11

Number of switches turned on in 3-phase 180° VSI at a single time are __________

A. 3
B. 2
C. 1
D. 4

Question 12

Short circuit problem is severe in case of Voltage source inverter.

A. True
B. False

Question 13

Switches used in VSI are ___________

A. Unipolar & Unidirectional
B. Bipolar & Bidirectional
C. Unipolar & Bidirectional
D. Unidirectional

Question 14

T.H.D value for 3-? 180° VSI is ________________

A. 36 %
B. 31 %
C. 39 %
D. 46 %

Question 15

Calculate power absorbed by 10 Ω load in 3-∅ 180° VSI if the value of DC supply is 36 V.

A. 20.6 W
B. 24.5 W
C. 26.4 W
D. 28.8 W

Question 16

Calculate power absorbed by 5 Ω load in 3-∅ 120° VSI if the value of DC supply is 16 V.

A. 17.06 W
B. 15.15 W
C. 18.25 W
D. 19.26 W

Question 17

Calculate the line voltage for 3-∅ 120° VSI if the value of DC supply is 24 V.

A. 16.52 V
B. 16.97 V
C. 12.96 V
D. 12.48 V

Question 18

Calculate the line voltage for 3-∅ 180° VSI if the value of DC supply is 22 V.

A. 18.52 V
B. 18.12 V
C. 17.96 V
D. 15.48 V

Question 19

Calculate the phase voltage for 3-∅ 120° VSI if the value of DC supply is 26 V.

A. 10.52 V
B. 10.97 V
C. 10.96 V
D. 10.61 V

Question 20

Calculate the phase voltage for 3-∅ 180° VSI if the value of DC supply is 20 V.

A. 9.40 V
B. 9.42 V
C. 9.18 V
D. 9.78 V