Q46
A perfect gas
A.
has constant viscosity
B.
is incompressible
C.
is of theoretical interest
AnswerD.
none of the above.
Answer: Option C
Solution
Answer: Option C
Solution:
A perfect gas is an idealized concept used in fluid mechanics and thermodynamics to simplify analysis.It strictly follows the ideal gas laws and assumes conditions such as no intermolecular forces and perfect elasticity of molecules.
In reality, no gas satisfies all these assumptions, so a perfect gas is not incompressible and does not have constant viscosity under all conditions.
Therefore, a perfect gas is mainly of theoretical interest, making option C the correct answer.