POWER SYSTEMS QUIZ

Which of the following is an impulse turbine

Pelton turbine.

Francis turbine.

None of above.

Kaplan turbine.

TRUE ANSWER : ?
YOUR ANSWER : ?

A 3-phase, 110 kV coaxial XLPE insulated power cable delivering power at 50 Hz, has a capacitance of 125 nF/km. If the dielectric loss tangent of XLPE is 2*10^-4, then dielcetric power loss in this cable in W/km/phase is

23.9

38.6

35.45

31.7

TRUE ANSWER : ?
YOUR ANSWER : ?

The draft tube is provided to

None of these

increase the acting head on the water wheel.

reduce the effect of water hammer.

raise the water surface of the stream to create an artificial head.

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YOUR ANSWER : ?

The power level of nuclear reactor can be increase by ( K = multiplication factor )

raising the value of K above 1 and keeping it at raised value.

lowering the value of K below 1 but later bringing it back to K = 1.

raising the value of K above 1, but later bringing it back to K = 1.

lowering the value of K below and keeping at that lowered value.

TRUE ANSWER : ?
YOUR ANSWER : ?

Based on the discharge, Kaplan turbine will discharge

1000 lpm

>10000 lpm

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YOUR ANSWER : ?

Bonding is done at the both ends of the cable to reduce the

copper loss

sheath loss

iron loss

None of these

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A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time?

0.85 Hz

-0.76 Hz

0.76 Hz

-0.85 Hz

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YOUR ANSWER : ?

Gas turbine power plants for maximum efficient may have

Reheating.

Heat exchangers.

All of above.

Multistage compression.

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YOUR ANSWER : ?

A power generating station has a plant capacity of 200 MW and maximum power demand is 150 MW. If average power generation is 110 MW, then find the load factor and capacity factor respectively?

0.55 and 0.733

0.65 and 0.55

0.733 and 0.65

0.733 and 0.55

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YOUR ANSWER : ?

Corona is accompanied by

hissing sound

All of these

power loss and interference

violet visible light

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YOUR ANSWER : ?