Mechanical Engineering - Thermodynamics

26.
The unit of power in S.I. units is kilowatt.
True
False
Answer: Option
Explanation:
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27.
Otto cycle consists of
two constant volume and two isentropic processes
two constant pressure and two isentropic processes
two constant volume and two isothermal processes
one constant pressure, one constant volume and two isentropic processes
Answer: Option
Explanation:
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28.
The increase in entropy of a system represents
increase in availability of energy
increase in temperature
decrease in pressure
degradation of energy
Answer: Option
Explanation:
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29.
In a free expansion process,
W1 - 2 = 0
Q1 - 2 = 0
dU = 0
all of these
Answer: Option
Explanation:
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30.
The reading of the pressure gauge fitted on a vessel is 25 bar. The atmospheric pressure is 1.03 bar and the value of 'g' is 9.81 m/s2. The absolute pressure in the vessel is
23.97 bar
25 bar
26.03 bar
34.81 bar
Answer: Option
Explanation:
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