PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

35

20

10

30

30

5

10

20

O.D. of the tube for square pitch

Shortest distance between two adj acent tube holes

None of these

Shortest centre to centre distance between adjacent tubes

Considerably less than 9

Considerably more than 9

About 9

About 3

Square pitch

Diagonal square pitch

Triangular pitch

Heat transfer rate is independent of tube arrangement

10 to 15

1.5 to 2

5 to 10

2.5 to 5

None of these

D/5 or minimum 2" to D

D/2 or minimum 2" to 5D

D/5 or minimum 2" to 5D

Flared out

Fluid in

Nozzle or rim

Ring plate

Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres

It is suitable for process, in which the final product is a liquor instead of solid

Liquor flows inside the tube, while the steam is outside submerging the tube

It is unsuitable for concentrating those liquids, which form a scale or deposit salt

Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²

Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hen

Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm²