This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Effect of Initial Pressure and Temperature Changes”.
1. When initial pressure of the steam turbine is not upto the designed pressure then power produced will _________
a) Increase
b) Decrease
c) Remains constant
d) None of the mentioned
View Answer
Explanation: When initial pressure of the steam turbine is less than the designed pressure it power production is reduced.
2. When initial temperature of the steam turbine is not upto the designed conditions then power production is ________
a) Reduced
b) Increased
c) Remains constant
d) None of the mentioned
View Answer
Explanation: When initial temperature of the steam turbine is less than the designed temperature its power production is reduced.
3. In gas turbines change in temperature does affect _________
a) pressure
b) mass flow
c) temperature
d) none of the mentioned
View Answer
Explanation: In gas turbines change in temperature affect mass flow.
4. In gas turbines change in the humidity affects the _________
a) pressure
b) mass flow
c) temperature
d) none of the mentioned
View Answer
Explanation: In gas turbines change in humidity affects mass flow.
5. In gas turbines mass flow is related to _________
a) pressure
b) temperature
c) pressure & temperature
d) none of the mentioned
View Answer
Explanation: In gas turbines mass flow depends on pressure when pressure changes mass flow also changes.
6. Power produced depends on the _________ in gas turbines.
a) volume
b) mass flow
c) volume & mass flow
d) none of the mentioned
View Answer
Explanation: As gas turbines works on brayton cycle when mass flow changes the net power produced also changes.
7. ___________ also plays a major role in gas turbine performance.
a) Inlet air density
b) Inlet air humidity
c) Inlet air density & humidity
d) None of the mentioned
View Answer
Explanation: Gas turbine performance depends on inlet air density and environmental conditions.
8. Anything that changes density __________ gas turbine performance.
a) can not effect
b) can effect
c) depends
d) none of the mentioned
View Answer
Explanation: When density is changed its mass flow rates is changed and that’s how gas turbine performance is changed.
9. The air density is a function of ambient temperature.
a) True
b) False
View Answer
Explanation: When density is increased its volume is decreased and then its temperature also decreases when pressure is constant. So air density is a function of ambient temperature.
10. Air density is a function of _________
a) Ambient temperature
b) Humidity
c) Pressure
d) All of the mentioned
View Answer
Explanation: Air density is the function of humidity, ambient temperature and pressure.
Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.
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