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GETCO Exam Paper (30-11-2008)

GETCO Exam Paper (30-11-2008)
The number of pilot wires required for protecting 3-phase transmission lines using Translay System of protection is

6
2
3
4

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GETCO Exam Paper (30-11-2008)
The load carrying capability of a long transmission line

may be limited by stability considerations
is always limited by conductor area
is increased at low ambient air temperature
both (a) & (b)

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GETCO Exam Paper (30-11-2008)
An air blast C.B. is usually employed for _____ duty

short
intermittent
instantaneous
repeated

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GETCO Exam Paper (30-11-2008)
Which loss in a transformer varies significantly with load?

Copper loss
Core loss
Eddy current loss
Hysteresis loss

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During O.C test obtained no load losses (core loss)
During S.C. test obtained copper loss (load losses)
during loaded condition of transformer copper loss more significant than core loss.

GETCO Exam Paper (30-11-2008)
Choose the word which is most nearly the SAME in meaning
cherish

detriment
damage
nurture
nourish

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GETCO Exam Paper (30-11-2008)
In a dry type transformer, accumulation of dust on the windings and core is likely to cause

short circuiting of primary winding
short circuiting of secondary winding
reduction in heat dissipation
corrosion of core material

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