Pseudoplastic
Bingham plastic
Dilatent
Newtonion
✅ The correct answer is option A.
Chemical Engineering MCQs
A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ₀ = 10 KPa, is shared between flat parallel plates separated by a distance of 10⁻³ m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is
10 KPa
20 KPa
30 KPa
40 KPa
✅ The correct answer is option B.
Bernoulli’s equation is not applicable, when the flow is
Irrotational
Incompressible
Viscous
All of the above
✅ The correct answer is option D.
Navier-Stokes equation is useful in the analysis of __________ fluid flow problems.
Non-viscous
Viscous
Turbulent
Rotational
✅ The correct answer is option B.
In continuous fluidisation
Solids are completely entrained
The pressure drop is less than that for batch fluidisation
There is no entrainment of solids
Velocity of the fluid is very small
✅ The correct answer is option A.
Check in a centrifugal pump is
Provided in the discharge line
Generally a globe valve
Provided to prevent liquid from backing up through the pump when the pump is turned off or accidently stops running
All of the above
✅ The correct answer is option D.
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
25.61 kPa
11.77 kPa
14.86 kPa
21.13 kPa
✅ The correct answer is option B.
The Mach number for hypersonic flow of compressible fluid is
1
> 1
> 4
< 2
✅ The correct answer is option C.
With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost
Increases
Decreases
Remains unchanged
Increases exponentially
✅ The correct answer is option B.
When the water is warm, the height to which it can be lifted by a pump
Decreases due to reduced viscosity
Decreases due to reduced vapour pressure
Increases due to increased vapour pressure
Decreases due to increased frictional resistance
✅ The correct answer is option B.