PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

Excessive liquid gradient on a tray may result in the

Maldistribution of gas

Gas blowing beneath cap skit

Back trapping

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Diameter of the seive tray column is determined by the

Height of the plate spacing

Upper limit of the vapour velocity

Hole diameter of the seive tray

Lower limit of vapour velocity

TRUE ANSWER : ?
YOUR ANSWER : ?

Removable connection of tubes to tube sheet is called

Nipple

Socket

Ferrule

Saddle

TRUE ANSWER : ?
YOUR ANSWER : ?

For a given design of bubble cap, the number of bubble caps to be used per tray is set by the

Diameter of the column

Plate spacing

Allowable gas velocity through the slots

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A 'rupture disc' is provided in chemical equipments as an accessory meant for

Enhancing mixing rate

Creating turbulence

Relieving excess pressure

Avoiding vortex formation

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following material is seldom used for pressure vessel construction?

Killed steel

Rimmed still

Mild steel

Semi-killed steel

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick out the wrong statement pertaining to the design of a horizontal tube evaporator.

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

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

TRUE ANSWER : ?
YOUR ANSWER : ?

In chemical process equipments, the conical bottom heads used, usually has an apex angle of

20°

60°

80°

40°

TRUE ANSWER : ?
YOUR ANSWER : ?

Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.

20

5

30

10

TRUE ANSWER : ?
YOUR ANSWER : ?

Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

0.55-0.85

0.35-0.75

0.1-0.2

0.4-0.6

TRUE ANSWER : ?
YOUR ANSWER : ?