POWER SYSTEMS QUIZ

Operating cost of thermal power station is

less than that of hydroelectric power plant.

less than that of nuclear power plant.

is the same as that of nuclear power plant.

less than that of diesel power plant.

TRUE ANSWER : ?
YOUR ANSWER : ?

Mechanical energy is supplied to a DC generator at the rate of 4200 J / S. The generator delivers 32.2 Amp at 120 V. How much energy is cost per minute of operation

20160 J.

20060 J.

23060 J.

25060 J.

TRUE ANSWER : ?
YOUR ANSWER : ?

Earth fault relay uses the which of the following sequence currents?

zero sequence

negative sequence

positive sequence

any of the above

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of solid fuel is expressed as

Cal / lt.

KCal / lt.

Cal / gm.

KCal / gm.

TRUE ANSWER : ?
YOUR ANSWER : ?

What should be the minimum depth (in metre)of cable trench to dug for laying of 1.1 kV?

0.75.

0.90.

1.05.

1.20.

TRUE ANSWER : ?
YOUR ANSWER : ?

In which power plant, the thermal efficiency is quite low

Steam power plant.

Hydro power plant.

Diesel power plant.

Nuclear power plant.

TRUE ANSWER : ?
YOUR ANSWER : ?

String efficiency depends upon

no. of SCR in the string.

voltage rating of one SCR.

all of these.

voltage rating of whole string.

TRUE ANSWER : ?
YOUR ANSWER : ?

The flow duration curve at a given head of a hydroelectric plant is used to determine

load factory at the plant.

total units of energy available.

diversity factor for the plant.

total power available at the site.

TRUE ANSWER : ?
YOUR ANSWER : ?

A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of

78%

80%

82%

76%

TRUE ANSWER : ?
YOUR ANSWER : ?

Graphite is use din nuclear plant as a / an

electrode.

coolant.

fuel.

moderator.

TRUE ANSWER : ?
YOUR ANSWER : ?

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