GETCO Exam Paper (30-11-2008)
On a long high voltage transmission line with heavy load, VAR compensation can be provided by using

series capacitors
shunt capacitors
series inductive reactors
shunt inductive reactors

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

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