Question 11 : Supplementary firing in a Brayton-Rankine combined cycle is ?
1. Good
2. Less effective
3. Very effective
4. None of the mentioned
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Question 12 : What is the optimum pressure ratio range for a gas turbine to obtain optimum efficiency?
1. 7-8.5
2. 10.5-12
3. 9.5-10
4. 10-20
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Question 13 : Maximum supplementary firing refers to?
1. The maximum fuel that can be fired with the oxygen available in the gas turbine inlet
2. The maximum fuel that can be fired with the oxygen available in the gas turbine exhaust
3. The maximum fuel that cannot be fired with the oxygen available in the gas turbine inlet
4. None of the mentioned
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Question 14 : The amount of water required as coolant for a combined cycle plant is?
1. very high
2. less
3. medium
4. none of the mentioned
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Question 15 : Gas turbines with intercooling, regeneration & reheat are more suitable for combined cycles.
1. True
2. False
3.
4.
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Question 16 : Which of these is a working fluid in the bottoming plant of a Brayton-Rankine combined plant?
1. Mercury
2. Steam
3. Water
4. Air
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Question 17 : The overall plant efficiencies in case of a combined cycle power generation is?
1. Low
2. High
3. Very low
4. Very high
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Question 18 : In the Brayton Rankine combined plant in series, the efficiency of the bottoming plant is?
1. a product of two efficiencies
2. a sum of two efficiencies
3. difference of two efficiencies
4. none of the mentioned
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Question 19 : Installations in stages is possible in Combined Cycle Plants.
1. true
2. false
3.
4.
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Question 20 : The investment cost related to the combined power generation is?
1. high
2. low
3. very high
4. none of the mentioned
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