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GATE EE 2000

MCQ (Single Correct Answer)

-0.6

The corona loss on a particular system at 50 Hz is 1 kW/km per phase. The corona loss at 60 Hz would be

1 kW/km per phase

0.83 kW/km per phase

1.2 kW/km per phase

1.13 kW/km per phase

GATE EE 2000

MCQ (Single Correct Answer)

-0.6

The incremental cost characteristic of two generators delivering $$200$$ $$MW$$ are as follows $$\,\,\,{{d{F_1}} \over {d{P_1}}} = 20 + 0.1{P_1},\,\,{{d{F_2}} \over {d{P_2}}} = 16 + 0.2{P_2}$$
For economic operation, the generations $${P_1}$$ and $${P_2}$$ should be

$${P_1} = {P_2} = 100\,MW$$

$${P_1} = 80MW,\,\,{P_2} = 120\,MW$$

$${P_1} = 200MW,\,\,{P_2} = 0\,MW$$

$${P_1} = 120MW,\,\,{P_2} = 80\,MW$$

GATE EE 2000

MCQ (Single Correct Answer)

-0.3

In a 3-step distance protection, the reach of the three zones of the relay at the beginning of the first line typically extends upto

100% of the first line, 50% of the second line and 20% of the third line.

80% of the first line, 50% of the second line and 20% of the third line.

80% of the first line, 20% of the second line and 10% of the third line.

50% of first line, 50% of second line and 20% of the third line.

GATE EE 2000

MCQ (Single Correct Answer)

-0.6

The plug setting of a negative sequence relay is $$0.2$$ $$A.$$ The current transformer ratio is $$5:1$$. The minimum value of line to line fault current for the operation of the relay is

$$1A$$

$${1 \over {1.732}}A$$

$$1.732$$ $$A$$

$${{0.2} \over {1.732}}A$$

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