22. A perfect gas

A.Has constant viscosity

B.None of the above.

C.Is incompressible

D.Is of theoretical interest

23. A fluid in equilibrium can't sustain

A.Tensile stress

B.Compressive stress

C.Shear stress

D.Bending stress

24. Viscosity of water in comparison to mercury is

A.Higher

B.Lower

C.Same

D.Higher/lower depending on temperature

25. The bulk modulus Of elasticity with increase in pressure

A.Increases

B.Decreases

C.Remains constant

D.Increases first upto certain limit and then decreases

26. The bulk modulus of elasticity

A.Has the dimensions of 1/pressure

B.Increases with pressure

C.Is large when fluid is more compressible

D.Is independent of pressure and viscosity

27. A balloon lifting in air follows the following principle

A.Law of gravitation

B.Archimedes principle

C.Principle of buoyancy

D.All of the above

28. The value of the coefficient of compressibility for water at ordinary 'pressure and temperature in kg/cm3 is equal to

A.1000

B.21000

C.2700

D.10000

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