Roughness of surface of the body
Pressure of main flow only
Length of the body in flow direction
All of the above
✅ The correct answer is option D.
Chemical Engineering MCQs
Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the
Wall roughness
Reynolds number
Both A and B
Neither A nor B
✅ The correct answer is option C.
The discharge through a venturimeter depends upon
Pressure drop only
Its orientation
Co-efficient of contraction only
None of these
✅ The correct answer is option A.
A fluidis (μ/ρ = 0.01 cm²/sec) moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.
7
700
7000
630
✅ The correct answer is option A.
An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonion fluid beyond yield stress. Which of the following is an ideal plastic?
Sewage sludge
Rubber latex
Blood
Sugar solution
✅ The correct answer is option A.
For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by
∂u/∂x = 0
∂(ρu)/∂x = 0
∂u/∂x = – ∂ρ/∂t
∂ρ/∂t = 0
✅ The correct answer is option A.
Fluid flow in a/an __________ is an example of pressure flow.
Partially filled pipeline
Pipe
Open channel
River
✅ The correct answer is option B.
Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter.
0.5
5
50
100
✅ The correct answer is option C.
Hydraulic radius of 6″ x 12″ cross-section, is __________ inches.
2
0.5
1.5
None of these
✅ The correct answer is option A.
Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its
Inner diameter
Outer diameter
Thickness
Neither inner nor outer diameter
✅ The correct answer is option D.