31. __________ shaped roof is most commonly used for cylindrical tanks.
Cone
Dome
Umbrella
Flat
✅ The correct answer is option A.
Process Equipment and Plant Design MCQs
32. A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design
only if the opening is on spherical vessel.
only if the opening is on a vertical cylinderical vessel.
only if the opening is on a horizontal cylinderical vessel.
irrespective of the shape of the vessel.
✅ The correct answer is option D.
33. For a given design of bubble cap, the number of bubble caps to be used per tray is set by the
allowable gas velocity through the slots.
plate spacing.
diameter of the column.
all (a), (b) and (c).
✅ The correct answer is option A.
34. For identical operating conditions, the pressure drop over __________ tray is the highest out of the following.
sieve
valve
counterflow
bubble cap
✅ The correct answer is option D.
35. Rivets are generally specified by the
head diameter
shank diameter
overall length
none of these
✅ The correct answer is option B.
36. __________ is the determining factor for the number of bubble caps to be used per tray.
Permissible slot velocity
Tray diameter
Liquid load
Vapor load
✅ The correct answer is option A.
37. Apex angle of conical heads used in the bottom heads of chemical process equipments is usually
30°
45°
60°
75°
✅ The correct answer is option C.
38. 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.
39. Fresh water carrying pipelines in chemical industries are coloured with __________ color.
sea green
brown
yellow
red
✅ The correct answer is option A.
40. 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.