withstand higher pressure for a given metallic shell thickness.
be fabricated very easily.
be designed without wind load considerations.
be supported very easily.
✅ The correct answer is option A.
Process Equipment and Plant Design MCQs
282. Generally, elliptical dished heads
are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m2 .
resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter.
are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D.
all (a), (b) and (c)
✅ The correct answer is option D.
283. The normal range of velocity of steam in pipes is __________ m/sec.
0.1-0.5
1-May
Oct-20
80-100
✅ The correct answer is option D.
284. Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter.
1.5 to 2
2.5 to 5
5 to 10
10 to 15
✅ The correct answer is option B.
285. The LMTD correction factor (FT) is applied in __________ heat exchangers.
1-1 cocurrent
double pipe
all multipass
all (involving liquid/liquid heat transfer)
✅ The correct answer is option C.
286. Excessive liquid gradient on a tray may result in the
maldistribution of gas.
back trapping.
gas blowing beneath cap skit.
all (a), (b) and (c).
✅ The correct answer is option D.
287. Smoker’s equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the
relative volatility is close to one (e.g., separation of close boiling isomers).
feed is not at its bubble point.
number of equilibrium stages in only stripping section is to be calculated.
number of equilibrium stages required is likely to be very small.
✅ The correct answer is option A.
288. Poisson’s ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson’s ratio for structural and pressure vessel steel may be taken as
0.01
0.3
0.75
0.95
✅ The correct answer is option B.
289. In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is
called tube pitch.
called tube clearance.
always less than the diameter of the tube.
none of these.
✅ The correct answer is option A.
290. Column support for the roof of cylindrical storage tank must be provided for
small diameter tanks.
large diameter tanks.
small diameter tall tanks.
all tanks irrespective of their heights and diameters.
✅ The correct answer is option B.