Process Equipment and Plant Design MCQs

At the inner surface.

At the mid thickness of the cylindrical wall.

At the outer surface.

None of these.

< 10

> 10

> 20

30

same

less

about 3 times

about 0.33 times

heat transfer co-efficient is proportional to 0.8th power

pressure drop is proportional to the square

both ‘a’ & ‘b’

neither ‘a’ nor ‘b’

0.05 to 0.15

0.25 to 0.50

0.5 to 0.8

0.8 to 0.9

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).

breaking stress

ultimate stress

elastic limit

yield point

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.

characteristic of process fluid.

velocity of process fluid containing suspended solids.

suspended solids in the fluid.

all (a), (b) and (c).