This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Closed Cycles and Operating Media Other than Air”.
1. A closed cycle gas turbine uses gas as a working fluid.
a) True
b) False
View Answer
Explanation: In a closed cycle gas turbine air is used as working fluid and working fluid moves in closed thermodynamic cycle.
2. In a closed cycle gas turbine heat is supplied from ____________
a) internal source
b) external source
c) combustion chamber
d) none of the mentioned
View Answer
Explanation: In a closed cycle gas turbine heat is supplied from external source.
3. Pebble bed modular is reactor coupled with _________
a) helium closed cycle gas turbine
b) argon closed cycle gas turbine
c) gas cooled reactors
d) none of the mentioned
View Answer
Explanation: Pebble bed modular reactor was made to work with helium closed cycle gas turbine.
4. At low temperature super critical CO2 closed cycle gas turbine has ________ efficiency when compared to helium closed cycle gas turbine.
a) low
b) high
c) optimum
d) none of the mentioned
View Answer
Explanation: At low temperatures super critical CO2 closed cycle gas turbine has higher efficiency.
5. At high pressure super critical CO2 closed cycle gas turbine has ____________ efficiency when compared to helium closed cycle gas turbine.
a) optimum
b) high
c) low
d) none of the mentioned
View Answer
Explanation: At high pressures super critical CO2 closed cycle gas turbine has low efficiency.
6. ML-1 nuclear reactor uses ________________
a) nitrogen based closed cycle gas turbine
b) helium based closed cycle gas turbine
c) super critical CO2 closed cycle gas turbine
d) none of the mentioned
View Answer
Explanation: In 1961 ML-1 Nuclear reactor used nitrogen based closed cycle gas turbine.
7. ML-1 Nuclear reactor works under ___________
a) 0.7 MPa
b) 0.9 MPa
c) 0.5 MPa
d) 0.3 MPa
View Answer
Explanation: Nitrogen based closed cycle gas turbine works under 0.9MPa.
8. In thermodynamic cycles input to working fluid is given using ________
a) compressor
b) condensor
c) recuperator
d) none of the mentioned
View Answer
Explanation: When it enters compressor its temperature is raised by means of increasing its pressure and that is how energy input is given.
9. Working fluids used in rankine cycles are _______
a) water/Steam
b) pentane
c) toluene
d) all of the mentioned
View Answer
Explanation: Working fluids used in rankine cycles are
Water/Steam
Pentane
Toluene.
10. A pressurized fluid that actuates a machine is called as working fluid.
a) True
b) False
View Answer
Explanation: A pressurized fluid that actuates a machine is called as working fluid.
Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.
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