A. Pipe length
B. Pipe roughness
C. Fluid density & viscosity
D. Mass flow rate of fluid
✅ The correct answer is option A.
Basic Chemical Engineering MCQs
Rain drops falling through atmospheric air attain limited terminal velocity, because of
A. Upward thrust due to air
B. Viscous force exerted by air
C. Surface tension effects of water
D. Force of gravity
✅ The correct answer is option B.
A friction lighter is normally used for lighting gas welding torch, because of the reason that
A. Its initial cost is very low
B. Duration of spark created is very small
C. Safety of welder is ensured
D. It is easier to operate & maintain
✅ The correct answer is option C.
Tempering of a material does not improve its
A. Machinability
B. Toughness
C. Internal stress level
D. Softness
✅ The correct answer is option A.
Surface tension is due to the __________ forces.
A. Viscous
B. Adhesive
C. Cohesive
D. All of these
✅ The correct answer is option C.
__________ iron is produced by the annealing of white cast iron.
A. Malleable
B. Nodular
C. Ductile
D. Grey
✅ The correct answer is option A.
For a first order chemical reaction, the concentration of the reactant decreases __________ with time.
A. Linearly
B. Exponentially
C. Logarithmically
D. Inversely
✅ The correct answer is option A.
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
A. Lead
B. Copper
C. Aluminium
D. Wrought iron
✅ The correct answer is option A.
Machinability of hard alloys and tool steels is improved by
A. Spherodising
B. Annealing
C. Tempering
D. Normalising
✅ The correct answer is option B.
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
A. One
B. Two
C. Three
D. None of these
✅ The correct answer is option B.