30°
45°
60°
75°
✅ The correct answer is option C.
Chemical Engineering MCQs
The thermal stress in a metallic bar does not depend upon the
changes in temperature.
cross-sectional area.
both (a) and (b).
neither (a) nor (b).
✅ The correct answer is option B.
In shell and tube heat exchangers, straight tie rods are used to
hold baffle in space.
fix the tubes in position.
account for thermal strain.
none of these.
✅ The correct answer is option A.
Lap joints are preferred for plates having thickness __________ mm.
< 12.5
> 3
> 5
5-Oct
✅ The correct answer is option B.
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if
plain carbon steel and cast iron parts are used.
wall thickness is > 30 mm.
material of construction is high alloy steel.
both(b) & (c).
✅ The correct answer is option D.
Movement of pipeline caused by thermal expansion is taken care by providing
expansion joint.
changes in its direction.
change in the shape of pipeline.
all (a), (b) and (c).
✅ The correct answer is option D.
Back-trapping in a distillation column results due to
low gas velocity.
high gas velocity.
excessive liquid gradient over the tray.
low reflux ratio.
✅ The correct answer is option C.
for a Tee (used as elbow, entering branch) would be
less than that for Tee (used as elbow, entering run).
more than that for Tee (used as elbow, entering run).
around 90.
both (b) and (c).
✅ The correct answer is option D.
In case of a continuous distillation column, increase in reflux ratio may result in the
lower fixed charges for the column.
greater cost for the reboiler heat supply.
greater cost for the condenser coolant.
all (a), (b) and (c).
✅ The correct answer is option D.
In a thin cylindrical shell, the hoop stress is __________ stress.
radial
circumferential tensile
compressive
longitudinal
✅ The correct answer is option B.