This set of Power Plant Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Advantages of Combined Cycle Power Generation”.
1. The overall plant efficiencies in case of a combined cycle power generation is?
a) Low
b) High
c) Very low
d) Very high
View Answer
Explanation: It is practically possible to attain efficiencies near to 50% in case of a combined cycle power generation.
2. The investment cost related to the combined power generation is?
a) high
b) low
c) very high
d) none of the mentioned
View Answer
Explanation: The investment cost related to the combined power generation is. This is because only 2/3 of the total output is produced in the gas turbine.
3. What % is the investment cost in Conventional steam power plant more than those in the combined cycle plants?
a) 10
b) 20
c) 30
d) 40
View Answer
Explanation: The investment cost in Conventional steam power plant is 30% more than those in the combined cycle plants.
4. The amount of water required as coolant for a combined cycle plant is?
a) very high
b) less
c) medium
d) none of the mentioned
View Answer
Explanation: The amount of cooling water required is only 40-50% of the steam power plant requirement.
5. Combined cycle plants have _____________ operation flexibility.
a) high
b) low
c) equal
d) very low
View Answer
Explanation: The ease of operation, i.e, the ease with which the plant can be started and stopped is the operation flexibility.
6. Installations in stages is possible in Combined Cycle Plants.
a) true
b) false
View Answer
Explanation: Because the gas turbines go into operation much sooner than the steam plants, installations in stages is possible in Combined Cycle plants.
7. Which of these has the most simple operation?
a) combined cycle plant
b) steam plant
c) combined cycle & steam plant
d) none of the mentioned
View Answer
Explanation: Combined cycle plant is more flexible than the steam plant and so it has the simplest operation.
8. Combustion in a Combined cycle plant has ______ environmental impact.
a) serious
b) little/no
c) toxic
d) none of the mentioned
View Answer
Explanation: As most of the processes of a combined cycle plant are degradable, so combustion in a combined cycle plant has no impact on the environment.
9. Cogeneration of heat & electricity is possible in a Combined cycle plants.
a) True
b) False
View Answer
Explanation: One of the major advantages of a combined cycle plants is the cogeneration of heat & electricity.
10. Efficiency of Natural gas fired Combined cycle plants is more than that of coal-fired plants.
a) true
b) false
View Answer
Explanation: As the efficiency of a combined cycle plant is high in comparison to that of steam power plant, naturally, the statement mentioned becomes true.
Sanfoundry Global Education & Learning Series – Power Plant Engineering.
To practice all areas of Power Plant Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.
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