Electrical Engineering Free Multiple choice Question Answers

Electrical Engineering Free Multiple choice Question No. 1. The purpose of providing an iron core in a transformer is to
(a) provide support to windings
(b) reduce hysteresis loss
(c) decrease the reluctance of the magnetic path
(d) reduce eddy current losses
Answer: c
Electrical Engineering Free Multiple choice Question No. 2. Which of the following is not a part of transformer installation ?
(a) Conservator
(b) Breather
(c) Buchholz relay
(d) Exciter
Answer: d
Electrical Engineering Free Multiple choice Question No. 3. While conducting short-circuit test on a transformer the following side is short
circuited
(a) High voltage side
(b) Low voltage side
(c) Primary side
(d) Secondary side
Answer: b
Electrical Engineering Free Multiple choice Question No. 4. In the transformer following winding has got more cross-sectional area
(a) Low voltage winding
(b) High voltage winding
(c) Primary winding
(d) Secondary winding
Answer: a
Electrical Engineering Free Multiple choice Question No. 5. A transformer transforms
(a) voltage
(b) current
(c) power
(d) frequency
Answer: c
Electrical Engineering Free Multiple choice Question No. 6. A transformer cannot raise or lower the voltage of a D.C. supply because
(a) there is no need to change the D.C. voltage
(b) a D.C. circuit has more losses
(c) Faraday’s laws of electromagnetic induction are not valid since the rate of change of flux
is zero
(d) none of the above
Answer: c

Electrical Engineering Free Multiple choice Question Answers- 21

Electrical Engineering Free Multiple choice Question No. 7. In a control system the output of the controller is given to
(a) final control element
(b) amplifier
(c) comparator
(d) sensor
(e) none of the above
Answer: a