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WorksheetsHV Substations
Total questions: 10
Worksheet time: 7mins
A transformer is device that
converts AC voltage to current
converts electrical energy to kinetic energy
converts AC voltage to a different level at the same amplitude
converts AC voltage to a different level at the same frequency
The primary winding is connected to the supply while the secondary winding is connected to the load.
True
False
A step-up transformer is a transformer that increases...
voltage.
current.
resistance.
conductance.
The secondary coil of a transformer has 500 turns. The output voltage required is 200 V. How many windings are needed on the primary coil with an input voltage of 1000 V.
(a)
In a transformer, the energy is conveyed from Primary to Secondary coils by what method?
Through the cooling coil
Through Air
By the Flux
None of the above
The substance used in a transformer breather is?
Asbestos Fiber.
Silica Sand.
Sodium Chloride.
Silica Gel
The function of the Conservator tank 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.
The Buchholz relay gives warning and protection against
Electrical faults inside the transformer itself
Electrical fault outside the transformer in outgoing feeder
For both outside and inside faults.
None of the above
the connection shown ...........
star connection
delta connection
the connection shown ...........
star connection
delta connection
