3943. for couplings and unions would be
60
200
350
negligible
✅ The correct answer is option D.
3948. In condenser, the cooling water is passed in the tube side in a pass arrangement, because
it reduces heat transfer area.
more thinner tubes can be used.
pressure drop is reduced.
it makes condenser compact.
✅ The correct answer is option A.
3953. 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.
3959. Overall tray efficiency of a distillation column is the ratio of the number of
overall gas transfer units to the number of ideal trays required.
ideal trays required to the number of real trays required.
real trays required to the number of ideal trays required.
none of these.
✅ The correct answer is option B.
3964. A rivetted joint does not fail by __________ of rivets.
tearing
shearing
tearing of the plate across a row
none of these
✅ The correct answer is option D.
3968. Shortest distance between two tubes is
called tube pitch.
called tube clearance.
more in case of triangular pitch as compared to square pitch of tube layout.
none of these.
✅ The correct answer is option B.
3970. If ‘D’ is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of
D/2 or minimum 2″ to 5D.
D/5 or minimum 2″ to 5D.
D/5 or minimum 2″ to D.
none of these.
✅ The correct answer is option B.
3975. 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.
3944. Rivets are generally specified by the
head diameter
shank diameter
overall length
none of these
✅ The correct answer is option B.
3949. 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.