Power System MCQ #19

Power System MCQ 253 to 256:

253) What are the advantages of gas turbine power plants?

      (a) no standby loss and requiring small building space

      (b) simple lubrication and high reliability

      (c) simplicity in design and installation

      (d) all of the above

254) Which of the following fuel is used in gas turbine power plants?

      (a) kerosene, natural gas

      (b) gas oil, diesel oil

      (c) residual oil

      (d) all of the above

255) The exhaust temperature of gas turbine is about _____

      (a) 540°C

      (b) 150°C

      (c) 240°C

      (d) 650°C

256) The fuel consumption of gas turbine power plant is about _____ output.

      (a) 0.40 – 0.80 kg per kWh

      (b) 0.2 – 0.25 kg per kWh

      (c) 0.50 – 1.00 kg per kWh

      (d) 1.0 – 2. Kg per kWh

ANSWER: | 253-d | 254-d | 255-a | 256-b |

Power System MCQ 257 to 260:

257) A gas turbine works on _____ cycle.

      (a) Rankine

      (b) dual

      (c) Carnot

      (d) Brayton

258) In which of the following the gas turbines are not widely used?

      (a) as a base load

      (b) as standby power plants

      (c) as peak load

      (d) in combination with steam power plant

259) Which of the following compressor is used in gas turbine power plants?

      (a) reciprocating compressor

      (b) multistage axial flow compressor

      (c) either a or B

      (d) screw compressor

260) In closed cycle gas turbine power plant, the work ratio is depending

      (a) temperature ratio, pressure ratio and specific heat ratio

      (b) specific heat ratio and pressure ratio

      (c) specific heat ratio and temperature ratio

      (d) only specific heat ratio

ANSWER: | 257-d | 258-a | 259-b | 260-a |

Power System MCQ 261 to 264:

261) Hydroelectric power stations are usually located in

      (a) high hilly areas

      (b) small hilly areas

      (c) Plain areas

      (d) any of the above

262) In hydropower station the amount of storage can be determined with the help of _____

      (a) Flow duration curve

      (b) Hydrograph

      (c) Mass curve

      (d) Storage

263) Why diesel power plant is suitable for peak load plants?

      (a) because of quick starting and absence of standby losses

      (b) because of high operating cost

      (c) because of lower installation cost per kW as compared to steam power plants

      (d) all of the above

264) The specific fuel consumption in diesel power plant at full load is about _____ kg per kWh.

      (a) 0.23

      (b) 1.23

      (c) 2.3

      (d) 3.5

ANSWER: | 261-a | 262-b | 263-a | 264-a |