D2
D5
D
D9
✅ The correct answer is option B.
Process Equipment and Plant Design MCQs
252. The normal range of velocity of water in pipes is __________ m/sec.
0.1-0.5
1-Feb
Oct-50
15-30
✅ The correct answer is option B.
253. Which of the following types of reactors is the safest from operation point of view ?
A vapor phase reactor.
Pot type reactor.
A liquid phase reactor.
A liquid phase catalytic reactor.
✅ The correct answer is option A.
254. The function of manholes provided in the shell of a distillation column is to
keep a check on the liquid gradient over the plate by direct visual observation.
give access to the individual trays for cleaning, maintenance and installation.
guard against foaming & entrainment by dumping antifoaming agent through it.
all (a), (b) and (c).
✅ The correct answer is option B.
255. In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the
O.D. of the tube for square pitch.
shortest distance between two adj acent tube holes.
shortest centre to centre distance between adjacent tubes.
none of these.
✅ The correct answer is option C.
256. With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will
increase
decrease
remain unaffected
increase or decrease depending on the nature of the dust.
✅ The correct answer is option A.
257. Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.
Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution.
Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids.
The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty.
In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes.
✅ The correct answer is option C.
258. In a multiple effect evaporator system having ‘n’ effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.
n’th
(1/n)th
0.5 nth
1.5 nth
✅ The correct answer is option B.
259. In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.
2.5
7.5
15
20
✅ The correct answer is option B.
260. Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.
16
19
28
38
✅ The correct answer is option B.