NEW
Font size
WorksheetsElectrical 2
Total questions: 10
Worksheet time: 5mins
The Function of a Conservator in a Transformer is ??
To project against internal fault.
To reduce core loss and copper loss
To take care of the expansion and contraction of transformer oil due to the variation of temperature of surroundings.
To cool the transformer oil.
Buchholz's relay gives warning and protection against
Electrical fault inside the transformer itself
Electrical fault outside the transformer in outgoing feeder
For both outside and inside faults.
Non of the above
What is the function of the fins or radiator fins in the transformer
For Cooling transformer
For lighting protection
For earthing protection
For over voltage protection
Which of the following does not change in a Transformer ??
Current
Voltage
Frequency
All of these
A transformer core is laminated to
Reduce hysteresis loss
Reduce eddy current losses
Reduce copper losses
All of these.
The Chemical used in Breather is
Asbestos Fiber.
Silica Sand.
Sodium Chloride.
Silica Gel
A transformer Oil must be Free from ?
Water
Sludge
Moisture
Ordor
If dc voltage is applied to the primary of a transformer it may:
Work
Burn the winding
Give lower voltage on the secondary side
Give higher voltage on the secondary side
Transformer ratings are usually expressed in terms of :
Voltage
KVA
kWh
KW
A common method of cooling a power transformer is ..............
natural air cooling
air blast cooling
oil cooling
any of the above
