Power system MCQ #8

Power system MCQ 121 to 124:

121) Which of the following power plant is least reliable?

      (a) Geothermal

      (b) Tidal

      (c) Wind

      (d) Solar

122) The commercial sources of energy are

      (a) solar, wind, biomass

      (b) fossil fuels, water, and radioactive substance

      (c) wood, animal waste

      (d) none of above

123) A hydroelectric power station is commonly found in

      (a) desert area

      (b) swamps

      (c) hilly area

      (d) grasslands

124) Which of the following method of generating power from sea water is more advantageous?

      (a) tidal power

      (b) wave power

      (c) ocean currents

      (d) none of above

ANSWER: | 121-c | 122-b | 123-c | 124-a |

Power system MCQ 125 to 128:

125) The advantages of hydro power plants

      (a) they can be use as peak load and base load plants.

      (b) they can be started and loaded very quickly

      (c) low operating cost

      (d) all the above

126) What is an enlarged body of water just above the intake and used as a regulating reservoir in hydropower plant

      (a) reservoir

      (b) penstock

      (c) spillways

      (d) forebay

127) Storage requirement can be determined from

      (a) either by mass curve or hydrograph

      (b) flow duration curve

      (c) mass curve

      (d) hydrograph

128) In a hydroelectric power plant, location of surge tank is near

      (a) tail race

      (b) turbine

      (c) reservoir

      (d) dam

ANSWER: | 125-d | 126-d | 127-a | 128-b |


Power system MCQ 129 to 132:

129) Which portion of the power system is more prone to fault?

      (a) underground cable

      (b) alternator

      (c) transformer

      (d) overhead lines

130) which portion of the power system is least prone to fault?

      (a) alternator

      (b) switchgear

      (c) transformer

      (d) overhead lines

131) The maximum short circuit current occurs in case of,

      (a) LG fault

      (b) LL fault

      (c) LLL fault

      (d) LLG fault

132) The positive sequence current of transmission line is

      (a) always zero

      (b) equal to negative sequence current

      (c) 1/3 of negative sequence current

      (d) 3 times negative sequence current

ANSWER: | 129-d | 130-a | 131-c | 132-b |