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
both (a) & (b)
is increased at low ambient air temperature

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GETCO Exam Paper (30-11-2008)
In a transformer it is difficult to measure the efficiency by output-input measurement methods because

losses are abnormally high
efficiency of transformer is usually high and hence extremely accurate measurements will be necessary
output is out of phase with respect to input
the output is sinusoidal and hence cannot be measured

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