231. For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is
✅ The correct answer is option A.
Process Equipment and Plant Design MCQs
232. A ‘rupture disc’ is provided in chemical equipments as an accessory meant for
relieving excess pressure.
creating turbulence.
enhancing mixing rate.
avoiding vortex formation.
✅ The correct answer is option A.
233. Optimum reflux ratio in a continuous distillation column is determined by the
maximum permissible vapour velocity.
flooding limit of the column.
total cost consideration (fixed cost of the column plus the cooling water & steam cost).
none of these.
✅ The correct answer is option C.
234. Steam is preferred to be used as a heating medium in heat exchangers, because of its
low cost.
high latent heat.
non-corrosive condensate.
high film co-efficient.
✅ The correct answer is option B.
235. The operating pressure drop range in a bag filter is about __________ mm water gauge.
50-150
5-Oct
500-1500
1500-2500
✅ The correct answer is option A.
236. “A claming section” before the liquid flows into the downcomer is privided to
permit release of entrained vapour in the liquid.
reduce the discharge fluctuation.
ensure better vapour-liquid contact.
cool the liquid before it flows down.
✅ The correct answer is option A.
237. Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or __________ times the column diameter, whichever is lower.
2.5-3.0
5-7.5
10-12.5
15-20
✅ The correct answer is option A.
238. The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.
disk and ring
segmental
orifice
independent of the type of
✅ The correct answer is option C.
240. __________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids.
Sieve plate
Packed
Bubble cap plate
None of these
✅ The correct answer is option B.