Mechanical Engineering - Thermodynamics

21.
Boyle's law states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
Agree
Disagree
Answer: Option
Explanation:
No answer description is available. Let's discuss.

22.
The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is always __________ one.
equal to
less than
greater than
Answer: Option
Explanation:
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23.
The isothermal and adiabatic processes are regarded as
reversible process
irreversible process
reversible or irreversible process
none of these
Answer: Option
Explanation:
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24.
The variables which control the physical properties of a perfect gas are
pressure exerted by the gas
volume occupied by the gas
temperature of the gas
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

25.
The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by
Kelvin
Joule
Clausis
Gay-Lussac
Answer: Option
Explanation:
No answer description is available. Let's discuss.