Top 350+ Solved Power Plant Engineering (PPE) MCQ Questions Answer
Q. In a by-product power cycle?
a. the power is produced initially
b. power production is in the middle stages of the cycle
c. power production is after the cycle has ended
d. none of the mentioned
Q. In terms of cost per MW compared to condensing sets of the same power, the back pressure turbines are?
a. more expensive
b. cheaper
c. costly
d. none of the mentioned
Q. Which of the following is a good medium for constant temperature heating?
a. water
b. steam
c. coolant
d. diesel
Q. The cogeneration plant efficiency nCO if WT, Qi, QH represents turbine work, heat input, heat output respectively is given by?
a. nco = (wt + qi) / qh
b. nco = (wt – qi) / qh
c. nco = (wt + qh) / qi
d. nco = (wt + qh) / qi
Q. If e is the electricity fraction of the total energy output, m is the electric plant efficiency and n is the steam generator efficiency; the heat added per unit total energy output is given by?
a. (1 / m) + ((1 – e) / n)
b. (1 / n) + ((1 – e) / m)
c. (1 / m) + ((1 + e) / n)
d. (1 / n) + ((1 – e) / m)
Q. Which of these is not considered economical for cogeneration?
a. a high fraction of electric to total energy
b. a low fraction of electric to total energy
c. a low fraction of total energy to electric energy
d. none of the mentioned
Q. Which of these is a working fluid in the bottoming plant of a Brayton-Rankine combined plant?
a. mercury
b. steam
c. water
d. air
Q. What would be the temperature of the gas in the combustion chamber?
a. 500 °c
b. 1600 °c
c. 1200 °c
d. 650 °c
Q. What is regeneration?
a. removal of heat from compressed air between stages of compression
b. transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber
c. to increase the temperature of partially expanded gases by burning more fuel
d. transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber and increases the temperature of partially expanded gases by burning more fuel
Q. What is meant by inter cooling?
a. removal of heat from compressed air between stages of compression
b. transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber
c. to increase the temperature of partially expanded gases by burning more fuel
d. none of the mentioned
Q. What is the air standard cycle for a Gas- Turbine called?
a. reheat cycle
b. rankine cycle
c. brayton cycle
d. diesel cycle
Q. Power is produced when the working fluid does some work on the?
a. shaft
b. fins
c. blades
d. none of the mentioned
Q. Which type of compressor is used in a gas turbine plant?
a. reciprocating compressor
b. screw compressor
c. multistage axial flow compressor
d. either reciprocating compressor & screw compressor
Q. What part or % of power developed is utilised for driving the compressor?
a. 65 %
b. 70 %
c. 55 %
d. 80 %