Size, shape, orientation and surface of the packing particles.
Density and viscosity of fluids.
Fluid flow rates.
All (a), (b) and (c).
✅ The correct answer is option D.
Chemical Engineering MCQs
Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.
half
equal to
twice
eight times
✅ The correct answer is option C.
for fully open gate valves would be
much more than that for fully open globe valves.
much less (say 2% than that for fully open globe valves).
around 7.
both (b) and (c).
✅ The correct answer is option D.
Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.
0.1 to 0.3
0.6 to 0.7
0.85 to 0.95
1.5 to 2
✅ The correct answer is option B.
Ratio of tube length to shell diameter for a shell and tube heat exchanger is
8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers.
4 : 1 to 8 : 1 for liquid-liquid exchanger.
< 4 : 1 for gas-gas exchangers.
both(b) & (c).
✅ The correct answer is option D.
In perforated plate towers, the
hole sizes may be around 1/8″ or 3/16″.
total hole area may be around 6 to 15% of tower cross-sectional area.
pressure drop is less compared is similar bubble cap towers.
all (a), (b) and (c).
✅ The correct answer is option D.
The ratio of shear stress to shear strain is called
bulk modulus
shear modulus
modulus of rigidity
modulus of elasticity
✅ The correct answer is option B.
In chemical process equipments, the conical bottom heads used, usually has an apex angle of
20°
40°
60°
80°
✅ The correct answer is option C.
Speed of industrial paddle agitator ranges from __________ rpm.
1 to 5
20 to 100
500 to 750
1000 to 2000
✅ The correct answer is option B.
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.
working
damaging
allowable
none of these
✅ The correct answer is option B.