Explore topic-wise MCQs in Electric Drives.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.

1.

Fifth lowest order harmonic present in 3- fully controlled rectifier is __________

A. 15<sup>th</sup>
B. 17<sup>th</sup>
C. 13<sup>th</sup>
D. 12<sup>th</sup>
Answer» C. 13<sup>th</sup>
Discussion
2.

Which harmonic is not present in 3- fully controlled rectifier?

A. 81<sub>st</sub> harmonic
B. 15<sup>th</sup> harmonic
C. 17<sup>th</sup> harmonic
D. 11<sup>th</sup> harmonic
Answer» B. 15<sup>th</sup> harmonic
Discussion
3.

Full form of DIAC is ___________

A. Digital Alternating current
B. Discrete Alternating current
C. Diode for Alternating current
D. Digital Alternating counter
Answer» D. Digital Alternating counter
Discussion
4.

Calculate the compensator rating required for sin( )=.13.

A. 0.45 P.U
B. 0.12 P.U
C. 0.13 P.U
D. 0.82 P.U
Answer» D. 0.82 P.U
Discussion
5.

Full form of FET is ___________

A. Field effect transistor
B. Field engage transistor
C. Field effect terminal
D. Fire engage transistor
Answer» B. Field engage transistor
Discussion
6.

Full form of MOSFET is ___________

A. Metal oxide silicon field effect transistor
B. Metal oxide semiconductor field effect transistor
C. Metal oxide settle field effect transistor
D. Metal oriented silicon field effect transistor
Answer» C. Metal oxide settle field effect transistor
Discussion
7.

Calculate the De-rating factor if the string efficiency is 16 %.

A. .84
B. .44
C. .5
D. .6
Answer» B. .44
Discussion
8.

Calculate the average value of thyristor current in 3- Full wave converter for the load current=9 A and =26 .

A. 4 A
B. 5 A
C. 7 A
D. 3 A
Answer» E.
Discussion
9.

Calculate the r.m.s value of thyristor current in 3- Full wave converter for the load current=4 A and =12 .

A. 2.3 A
B. 2.5 A
C. 2.7 A
D. 2.9 A
Answer» B. 2.5 A
Discussion
10.

What is the formula for output voltage for 3- Full wave bridge rectifier for R load for &gt; 60 ?

A. 2V<sub>ml</sub>(1+cos( +60 ))
B. 3V<sub>ml</sub>(1+cos(60 + )) 2
C. 3V<sub>ml</sub>(1+cos(60 + ))
D. 6V<sub>ml</sub>(cos( ))
Answer» D. 6V<sub>ml</sub>(cos( ))
Discussion
11.

____________ is the boundary for C.C.M and D.C.M mode in 3- Full wave bridge rectifier for R load.

A. 60
B. 10
C. 80
D. 50
Answer» B. 10
Discussion
12.

What is the formula for output voltage for 3- Full wave bridge rectifier for R load for &lt; 60 ?

A. 2V<sub>ml</sub>(cos( ))
B. 3V<sub>ml</sub>(cos( )) 2
C. 3V<sub>ml</sub>(cos( ))
D. 6V<sub>ml</sub>(cos( ))
Answer» D. 6V<sub>ml</sub>(cos( ))
Discussion
13.

The output voltage of 3- Full wave bridge rectifier is six times of 3- Half-wave rectifier.

A. True
B. False
Answer» C.
Discussion
14.

What is the formula for output voltage for 3- Full wave bridge rectifier for R-L load?

A. 3V<sub>ml</sub>(cos( )) 2
B. 3V<sub>ml</sub>(cos( ))
C. 2V<sub>ml</sub>(cos( ))
D. 6V<sub>ml</sub>(cos( ))
Answer» C. 2V<sub>ml</sub>(cos( ))
Discussion
15.

For &gt; 90 , 3- Full wave bridge rectifier acts as a natural commutated inverter.

A. True
B. False
Answer» B. False
Discussion