At the inner surface.
At the mid thickness of the cylindrical wall.
At the outer surface.
None of these.
✅ The correct answer is option A.
Process Equipment and Plant Design MCQs
142. In case of a ‘thin’ pressure vessel, the ratio of its diameter to wall thickness is
< 10
> 10
> 20
30
✅ The correct answer is option B.
143. Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is
same
less
about 3 times
about 0.33 times
✅ The correct answer is option C.
144. In a shell and tube heat exchanger, tube side __________ of the mass velocity.
heat transfer co-efficient is proportional to 0.8th power
pressure drop is proportional to the square
both ‘a’ & ‘b’
neither ‘a’ nor ‘b’
✅ The correct answer is option C.
145. Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.
✅ The correct answer is option A.
146. Hold up of material in a operating rotary drier is in the range of
0.05 to 0.15
0.25 to 0.50
0.5 to 0.8
0.8 to 0.9
✅ The correct answer is option A.
147. A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
is economical in operation.
employs high velocity, high heat transfer rate and less heating surface requirement.
employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle.
both (b) & (c).
✅ The correct answer is option D.
148. Stress-strain diagram for low carbon steel/mild steel is shown below in the Fig. The point ‘A’ on the Fig. represents the
breaking stress
ultimate stress
elastic limit
yield point
✅ The correct answer is option C.
149. Pick out the wrong statement pertaining to the design of a horizontal tube evaporator.
It is unsuitable for concentrating those liquids, which form a scale or deposit salt.
It is suitable for process, in which the final product is a liquor instead of solid.
Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres.
Liquor flows inside the tube, while the steam is outside submerging the tube.
✅ The correct answer is option D.
150. The value of fouling factor depends upon the
characteristic of process fluid.
velocity of process fluid containing suspended solids.
suspended solids in the fluid.
all (a), (b) and (c).
✅ The correct answer is option D.