Transformers

to provide free passage to the cooling oil

to insulate the coils from each other

both (A) and (B)

none of the above

the current on secondary side is negligible

the voltage on secondary side does not vary

the voltage applied on primary side is low

full-load current is not supplied to the transformer

Cellulose

Asbestos

Mica

Glass fibre

not change

decrease

increase

any of the above

to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns

to absorb the line surge voltage and save the winding of transformer from damage

to reflect the line surge and save the winding of a transformer from damage

none of the above

low power factor wattmeter

unity power factor wattmeter

frequency meter

any type of wattmeter

capacitive only

inductive only

inductive or resistive

none of the above

friction and windage losses

magnetic losses

hysteresis and eddy current losses

copper losses

180°

120°

90°

75°

primary is supplied rated voltage

primary is supplied full-load current

primary is supplied current at reduced voltage

primary is supplied rated kVA