Correct Answer Option-C

Question84:-Power transformers are designed to have maximum efficiency at
As Half load
B:-No load

CeLittle more than full load

-Near full oad
Correct Answer: Option-D
Question85:-Dielectric strength of a transformer oil is measured in
Astilo voltimm
B:-Kilo watt
Kilo volt
D=Kilo ohm
Correct Answer Option-A
Question86:-The short circuit test in the transformer is used to determine
AsThe eddy current loss
B:-The hysteresis loss
लता copper loss at any load or at full load
D-The iron loss at any load
Correct Answer:- Option-C
Question87:-The purpose of breather in a transformer is
AsTo reduce core loss.
B:-To cooling the windings
ಸು protect the tank from lightning

“To absorb moisture from air

Correct Answer

۷۰ 005۰۵
(०८०५५०७९. ७८८११०२ relay is placed
‘Asin between HV winding and the bushing
Br-In between the tank and the conservator
Cin between LV winding and bushing
D:-In between the conservator and breather
Correct Answer: Option-8
Question89:-An autotransformer is mainly used as a
As\oltage regulating transformer
8:-Distrbution transformer
Power transformer
D-nstrument transformer
Correct Answer Option-A
Question90:-Transformer is used to change the values of
AsPower factor
B:-Frequency
001௧0௨

Power

Correct Answer:- Option-C

Question91:-Continuity of an electrical circut is usually checked by
AvAmmeter
B:-Ohmmeter

c:Noltmeter

“Power factor meter
Correct Answer: Option-8
Question92:-Which of the following 15 an absolute instrument ?
AsTangent galvanometer
B:-Power factor meter
C-Ammeter
D:-Wattmeter
Correct Answer Option-A

‘Question93:-The disadvantage of gravity control method is that it is