Fluid Mechanics

One litre of water occupies a volume of

• 100 cm³

• 250 cm³

• 500 cm³

• 1000 cm³

The value of bulk modulus of a fluid is required to determine

• Reynold's number

• Froude's number

• Mach number

• Euler's number

In one dimensional flow, the flow

• is steady and uniform

• takes place in straight line

• takes place in curve

• takes place in one direction

The kinematic viscosity is the

• ratio of absolute viscosity to the density of the liquid

• ratio of density of the liquid to the absolute viscosity

• product of absolute viscosity and density of the liquid

• product of absolute viscosity and mass of the liquid

The pressure less than atmospheric pressure is known as

• suction pressure

• vacuum pressure

• negative gauge pressure

• all of these

The total energy line lies over the hydraulic gradient line by an amount equal to the

• pressure head

• velocity head

• pressure head + velocity head

• pressure head - velocity head

If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

• neutral equilibrium

• stable equilibrium

• unstable equilibrium

• none of these

The power transmitted through a pipe is (where w = Specific weight in N/m³, and Q = Discharge in m³/s)

• w x Q x H

• w x Q x h_f

• w x Q (H - h_f)

• w x Q (H + h_f)

According to Archimede's principle, if a body is immersed partially or fully in a fluid then the buoyancy force is _______ the weight of fluid displaced by the body.

• equal to

• less than

• more than

• unpredictable

The component of the total force exerted by fluid on a body in the direction parallel to the direction of motion is called as

• lift

• drag

• both a. and b.

• none of the above