Open Cycle and Closed Cycle Plants - MCQs with answers

Open Cycle and Closed Cycle Plants - MCQs with answers

Q1. What would be the temperature of the gas in the combustion chamber?

a. 500 °
b. 1600 °
c. 1200 °
d. 650 °

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Q2. The efficiency of the open cycle gas plant is quite low. Why?

a. Gas gets cooled before reaching the turbine wheels.
b. A lot of mechanical energy is used up by the compressor.
c. Due to the presence of regenerator and absence of air pre heater.
d. Both (a) and (b).

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Q3. To improve the efficiency of the gas turbines, which among these are used?

a. Regenerator.
b. Inter cooling.
c. Reheating.
d. All of these.

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Q4. 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. Both (b) & (c).

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Q5. 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 above.

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Q6. Which material is used for the manufacture of the turbine blades?

a. Stainless steel.
b. Carbon steel.
c. High nickel alloy.
d. High alloy steel.

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Q7. Which among these plants are most efficient?

a. Open cycle.
b. Combined cycle.
c. Closed cycle.
d. Either (a) or (c)

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