POWER SYSTEMS QUIZ

One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is

130.2 MWhr

140 MWhr

120 MWhr

135.3 MWhr

TRUE ANSWER : ?
YOUR ANSWER : ?

For transmission line which one of the following relation is true?

AD + BC = 0

AD - BC = 0

AD - BC = -1

AD - BC = 1

TRUE ANSWER : ?
YOUR ANSWER : ?

Plant capacity factor value is

1

greater than 1

0

less than 1

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following configuration power transferability is higher?

horizontal configuration

same in both configuration

None of these

triangular configuration

TRUE ANSWER : ?
YOUR ANSWER : ?

Four identical alternators each are rated for 20 MVA, 11 KV having a subtransient reactance of 16% are working in parallel. The short circuit level at the busbar is

400 MVA

500 MVA

125 MVA

100 MVA

TRUE ANSWER : ?
YOUR ANSWER : ?

The voltage regulation of a line at full load 0.8 power factor is 11. A long transmission line under no load conditions, for a good voltage profile needs

shunt reactor at receiving end

shunt resistance at receiving end

shunt capacitor at receiving end

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The per unit impedance Z(pu) is given by

ZΩ* (MVA)b*100/(KV)²b

ZΩ* (MVA)b/((KV)²b *100)

ZΩ* (kVA)b/(KV)²b

ZΩ* (MVA)b/(KV)²b

TRUE ANSWER : ?
YOUR ANSWER : ?

For flat voltage profile system, voltage regulation is

0%

any of the above

50%

100%

TRUE ANSWER : ?
YOUR ANSWER : ?

If sag in an overhead line increase, tension in the line

decrease

None of these

increase

remains same

TRUE ANSWER : ?
YOUR ANSWER : ?

String chart is drawn between

both 1 and 2

T on Y-axis and S and T on on X-axis

nether 1 nor 2

temperature (T) on X- axis, sag(S) and tension (T) on Y-axis

TRUE ANSWER : ?
YOUR ANSWER : ?

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