Cycloconverters – 1 – 1

1. A cycloconverter is a :

(a) Frequency changer from higher to lower frequency with one-state conversion
(b) Frequency changer from higher to lower frequency with two-stage conversion
(c) Frequency changer from lower to higher frequency with one-stage conversion
(d) Either a or c

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

2. The cycloconverter require natural or forced commutation as under :

(a) Natural commutationin bothstep-up and step down cycloconverter
(b) Forced commutation in both step-up and step-down cycloconverter
(c) Forced commutation in step-up cycloconverter
(d) Forced commutation in step-down cycloconverter

ANSWER
Answer : (c)

EXPLANATION
No answer description available for this question. Let us discuss.

3. The quality of output ac voltage of a cycloconverter is improved with :

(a) Increase in output voltage at reduced frequency
(b) Increase in output voltage at increased frequency
(c) decrease in output voltage at reduced frequency
(d) decrease in output voltage at increased frequency

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

4. How many switches are used to construct a three-phase to three-phase cycloconverter ?

(a) 3
(b) 6
(c) 12
(d) 18

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

5. A four quadrant chopper cannot be operated as :

(a) One quadrant chopper
(b) Cycloconverter
(c) Inverter
(d) Bidirectional rectifier

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

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