Fluid Mechanics MCQs

C_d for the orifice plate varies from

A bed consists of particles of density 2000 kg/m³. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is

Friction factor for a hydraulically smooth pipe at N_Re = 2100 is f₁. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of N_Re, will

Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation?
1. Fluid flow is frictionless & irrotational
2. Fluid flow is steady
3. Fluid flow is uniform & turbulent
4. Fluid is compressible
5. Fluid is incompressible

The terminal velocity of a particle moving through a fluid varies as d_pⁿ. The value of n is equal to __________ in Stoke's law regime.

For the free settling of a spherical particle through a fluid, the slope of, C_D-log N_Re , plot is

f = 16/N_Re, is valid for

A Newtonion liquid (ρ = density, μ = viscosity) is flowing with velocity v in a tube of diameter 'D'. Let Δp be the pressure drop across the length 'L'. For a laminar flow, Δp is proportional to

The maximum delivery pressure of a reciprocating compressor may be about __________ kg/cm².