Increases as fluid viscosity increases
Increases as pipe diameter increases
Independent of fluid density
None of these
✅ The correct answer is option B.
Chemical Engineering MCQs
In Newton’s law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is
0.44
0.044
4.4
44
✅ The correct answer is option A.
It is possible to integrate an automatic flow controller to a
Flow nozzle
Venturimeter
Rotameter
None of these
✅ The correct answer is option C.
One stoke (unit of kinematic viscosity) is equivalent to
1 cm²/second
1 m²/second
1 gm/cm. second
1 kg . m/second
✅ The correct answer is option A.
Shear stress in a fluid flowing in a round pipe
Varies parabolically across the cross-section
Remains constant over the cross-section
Is zero at the centre and varies linearly with the radius
Is zero at the wall and increases linearly to the centre
✅ The correct answer is option C.
The line of action of the buoyant force acts through the
Centroid of the displaced volume of fluid
Centre of gravity of a submerged body
Centroid of the volume of any floating body
None of these
✅ The correct answer is option A.
The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is
Q∝N : H∝N² : P∝N³
Q∝N² : H∝N³ : P∝N
Q∝N : H∝N³ : P∝N²
Q∝N³ : H∝N : P∝N²
✅ The correct answer is option A.
In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of
Relative roughness
Absolute roughness
Friction co-efficient for flows at equal Reynold number
All of the above
✅ The correct answer is option C.
Reciprocating pumps compared to centrifugal pumps
Deliver liquid at uniform pressure
Can handle slurries more efficiently
Are not subject to air binding
Can be operated with delivery valve closed
✅ The correct answer is option C.
A floating/submerged body is always stable, if its centre of gravity
Lies above its centre of buoyancy
And centre of buoyancy coincide
Lies below its centre of buoyancy
Lies above its meta centre
✅ The correct answer is option C.