Mechanical Engineering - Thermodynamics

36.
The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)
rγ - 1
1 - rγ - 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.

37.
To ensure complete and rapid combustion of a fuel, some quantity of air, in excess of the theoretical or minimum air is supplied.
Yes
No
Answer: Option
Explanation:
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38.
According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) __________ with the change in pressure and temperature of the gas.
change
do not change
Answer: Option
Explanation:
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39.
One molecule of oxygen is __________ times heavier than the hydrogen atom.
12
14
16
32
Answer: Option
Explanation:
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40.
Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)
cp - cv = R
Both (B) and (C)
Answer: Option
Explanation:
No answer description is available. Let's discuss.