Fluid Mechanics

The property of water to wet a solid surface when it comes in contact is known as

• Surface tension

• Viscosity

• Capilary action

• Vapor pressure

An ideal fluid is defined as the fluid which is

• Compressible

• Incompressible

• Compressible and viscous

• Incompressible and non-viscous

The most important properties which influences the fluid motion to a great extent is

• Density

• Specific weight

• Specific volume

• Viscosity

Surface tension is

• Line force

• Force per unit surface area

• For per unit volume

• All the above

Newton's law of viscosity state that shear stress is directly proportional to

• Velocity

• Shear strain

• Velocity gradient

• Viscosity

The reciprocal of the density is known as

• Specific gravity

• Specific weight

• Specific volume

• None of these

Which one of the following is the wrong statement about capillarity?

Magnitudes depends upon

• The diameter of tube

• The specific weight of the liquid

• Its surface tension

• Its viscosity

A Newtonian fluid is defined as the fluid which

• is highly viscous

• is compressible and non-viscous

• is incompressible and viscous

• obeys Newton's law of viscosity

Stoke is the unit of

• dynamic viscosity

• kinematic viscosity

• specific volume

• specific weight

The correct statement about the viscosity of gases

• changes with temperature but is practically unaffected by pressure

• practically unaffected by temperature but very much affected by pressure

• affected considerably temperature and pressure

• unaffected by temperature and pressure