POWER SYSTEMS QUIZ

Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

Halves.

Decrease but does not halves.

Doubled.

Increase but does not doubled.

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If R = 84 ohm/Km, G = 10-6 mho/Km, H = 0.01 H/Km, C = 0.061 μ F/Km and frequency = 1000 Hz, then what is the value of propagation constant of the transmission line

0.018 per Km.

None of them.

0.01 + j 0.02 per Km.

0.09 + j 0.018 per Km.

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The 1st nuclear plant in world was commissioned in

UAE.

U.S.A.

U.S.S.R.

U.K.

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A hydroelectric power station is commonly found in

hilly areas.

grasslands.

desert areas.

swamps.

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Bundled conductors are used for EHV transmission lines primarily for reducing the

corona loss

surge impedance of the line

voltage drop across the line

copper loss

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Location of a surge tank, in an hydro electric power station is near

tail race.

reservoir.

dam.

turbine.

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Mercury is choice with steam in binary vapor cycle because

higher critical temperature and pressure.

higher saturation temperature than other fluids.

all of above.

relative low vaporization pressure.

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The insulator thickness on the conductor, in cables depends upon

voltage

reactive power

current

power factor

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For load flow studies, What are the quantities specified at load bus are

δ and Q

V and δ

P and Q

P and V

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Highest pressure generating pump inside the thermal plant is

boiler feed pump

high pressure heater

All of these

low pressure heater

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