1000+ Converters and Rectifiers MCQ Questions and Answers Pdf - 2

Question: 6

Which of the following mercury arc rectifier will deliver least undulating current?

(A) single phase

(B) two phase

(C) three phase

(D) six phase

Question: 7

The efficiency of the copper oxide rectifier seldom exceeds.

(A) 65 to 75%

(B) 80 to 85%

(C) 85 to 90%

(D) 90 to 95%

Question: 8

The efficiency of an electrolytic rectifier is nearly

(A) 40%

(B) 60%

(C) 70%

(D) 80%

Question: 9

In a three phase mercury arc rectifiers each anode conducts for

(A) one half a cycle

(B) one third of a cycle

(C) one fourth of a cycle

(D) two third of a cycle

Question: 10

Which of the following methods may be used to convert A.C. system to D.C.?

(A) rotary converters

(B) motor generator sets

(C) rectifiers

(D) all of the above