Pre-Placement Mock Test – 2

Power number is the ratio of

• (a) drag stress to inertial stress.
• (b) inertial stress to drag stress.
• (c) inertial stress to gravitational stress.
• (d) gravitational stress to drag stress.

Froude number is the ratio of

• (a) shear stress to gravitational stress.
• (b) drag stress to shear stress.
• (c) inertial stress to shear stress.
• (d) inertial stress to gravitational stress.

A fluid in equilibrium means that

• (a) its viscosity is zero
• (b) shear stresses are acting on the fluid but no flow behavior is manifested
• (c) it is free from shear stresses
• (d) a hypothetical situation because fluids are never in equilibrium.

A manometer is used to measure

• (a) pressure difference
• (b) absolute pressure
• (c) both (a) and (b)
• (d) neither (a) nor (b)

Continuity equation applies to

• (a) incompressible fluids
• (b) compressible fluids
• (c) highly viscous fluids
• (d) both incompressible and compressible fluids

Two piping systems are said to be equivalent when the.... same.

• (a) fluid flow rate & friction loss
• (b) length & friction factor
• (c) diameter & friction factor
• (d) length & diameter

The buoyant force acting on a floating body is dependent on the

• (a) viscosity of the liquid.
• (b) weight of the liquid displaced.
• (c) depth of immersion of the body
• (d) surface tension of the liquid.

Air vessel of a reciprocating pump is initially filled with

• (a) atmospheric air
• (b) compressed air
• (c) water
• (d) none of these

Stoke's law is valid when the particle Reynolds number is

• (a) < 1
• (b) > 1
• (c) < 5
• (d) none of these

The continuity equation of fluid mechanics utilises the principle of conservation of

• (a) momentum
• (b) mass
• (c) energy
• (d) both (b) & (c)