Q1/An ideal Brayton cycle with a pressure ratio of 8. The inlet temperature is 27 °C and maximum cycle temperature is 1027 °C. Utilizing the air-standard assumptions, draw TS diagram and calculate: (a) Temperature at each state. (b) Thermal efficiency. Q2/ Chose the letter that reflect the correct answer. 1. on which of the following cycles gas turbine work: a. Brayton. 2. Which statement is correct? a. The turbine used in gas turbine power plant is larger than that used in steam power plants. b. The turbine used in gas turbine power plants is smaller than that used in steam power plants. c. The same turbine can be used for both plants. b. Rankin. c. combined. d. duel. d. None of the above. 3. In a gas turbine cycle, the turbine output is 800 and the compressor work is 600 while heat added is 1000, what is the thermal efficiency? C. 40%. a. 80%. b. 60%. d. 20%. 4. Which statement is correct for Brayton cycle? a. First set is compressed reversibly and adiabatically. b. heat is added reversibly at constant pressure. c. air expands in turbine reversibly and adiabatically. d. all of the mentioned. 5. Effectiveness can be defined as a. decrease in exhausted gases b. inverse of the efficiency c. ratio of heat rate to the mass entering d. ratio of Actual heat transferred to the maximum heat transferred 6. At two stages when equal pressure ratio are maintained the work output d. none of the mentioned a. increases. b. decreases. c. optimum. 7. In an actual gas turbine isoentropic and isobaric process takes place. a. True b. False 8. In an ideal gas turbine, mechanical energy is converted into heat by a. Friction between piston and cylinder. b. Frictional losses in compressor. c. No mechanical energy is converted into heat energy. d. None of the mentioned.
Q1/An ideal Brayton cycle with a pressure ratio of 8. The inlet temperature is 27 °C and maximum cycle temperature is 1027 °C. Utilizing the air-standard assumptions, draw TS diagram and calculate: (a) Temperature at each state. (b) Thermal efficiency. Q2/ Chose the letter that reflect the correct answer. 1. on which of the following cycles gas turbine work: a. Brayton. 2. Which statement is correct? a. The turbine used in gas turbine power plant is larger than that used in steam power plants. b. The turbine used in gas turbine power plants is smaller than that used in steam power plants. c. The same turbine can be used for both plants. b. Rankin. c. combined. d. duel. d. None of the above. 3. In a gas turbine cycle, the turbine output is 800 and the compressor work is 600 while heat added is 1000, what is the thermal efficiency? C. 40%. a. 80%. b. 60%. d. 20%. 4. Which statement is correct for Brayton cycle? a. First set is compressed reversibly and adiabatically. b. heat is added reversibly at constant pressure. c. air expands in turbine reversibly and adiabatically. d. all of the mentioned. 5. Effectiveness can be defined as a. decrease in exhausted gases b. inverse of the efficiency c. ratio of heat rate to the mass entering d. ratio of Actual heat transferred to the maximum heat transferred 6. At two stages when equal pressure ratio are maintained the work output d. none of the mentioned a. increases. b. decreases. c. optimum. 7. In an actual gas turbine isoentropic and isobaric process takes place. a. True b. False 8. In an ideal gas turbine, mechanical energy is converted into heat by a. Friction between piston and cylinder. b. Frictional losses in compressor. c. No mechanical energy is converted into heat energy. d. None of the mentioned.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Power plant. Gas turbine cycle . I need these two questions please.
Transcribed Image Text:Q1/An ideal Brayton cycle with a pressure ratio of 8. The inlet temperature is
27 °C and maximum cycle temperature is 1027 °C. Utilizing the air-standard
assumptions, draw TS diagram and calculate:
(a) Temperature at each state.
(b) Thermal efficiency.
Q2/ Chose the letter that reflect the correct answer.
1. on which of the following cycles gas turbine work:
a. Brayton.
2. Which statement is correct?
a. The turbine used in gas turbine power plant is larger than that used in steam
power plants.
b. The turbine used in gas turbine power plants is smaller than that used in
steam power plants.
c. The same turbine can be used for both plants.
b. Rankin.
C. combined.
d. duel.
d. None of the above.
3. In a gas turbine cycle, the turbine output is 800 and the compressor work is 600
while heat added is 1000, what is the thermal efficiency?
a. 80%.
b. 60%.
C. 40%.
d. 20%.
4. Which statement is correct for Brayton cycle?
a. First set is compressed reversibly and adiabatically.
b. heat is added reversibly at constant pressure.
c. air expands in turbine reversibly and adiabatically.
d. all of the mentioned.
5. Effectiveness can be defined as
a. decrease in exhausted gases
b. inverse of the efficiency
c. ratio of heat rate to the mass entering
d. ratio of Actual heat transferred to the maximum heat transferred
6. At two stages when equal pressure ratio are maintained the work output
a. increases. b. decreases.
c. optimum. d. none of the mentioned
7. In an actual gas turbine isoentropic and isobaric process takes place.
a. True
b. False
8. In an ideal gas turbine, mechanical energy is converted into heat by
a. Friction between piston and cylinder.
b. Frictional losses in compressor.
c. No mechanical energy is converted into heat energy.
d. None of the mentioned.
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