PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

In the design of a shell and tube heat exchanger, the corrosion allowance

All of these

For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm

For internal cover and tube sheet is provided on both the sides

Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc

TRUE ANSWER : ?
YOUR ANSWER : ?

The dust collection efficiency of a cyclone separator

Is inversely proportional to the mass of the dust particle

Is directly proportional to the radius of the dust particle path

Decreases with increase in gas flow rate

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Longitundinal stress induced in a thin walled cylindrical storage vessel is

PD/4t

PD/2t

PD/6t

PD/3t

TRUE ANSWER : ?
YOUR ANSWER : ?

In inclined long tube vertical evaporators, the tubes are inclined at an angle of

45°

90°

15°

60°

TRUE ANSWER : ?
YOUR ANSWER : ?

Shortest distance between two tubes is

More in case of triangular pitch as compared to square pitch of tube layout

Called tube pitch

None of these

Called tube clearance

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum baffle height should be

Equal to the impeller diameter

Twice the impeller diameter

3/4 of the tank height

Twice the tank diameter

TRUE ANSWER : ?
YOUR ANSWER : ?

In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

σh = σL/2

σh = σL

σh = 2 σL

No relation exists

TRUE ANSWER : ?
YOUR ANSWER : ?

The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called

Static submergence

None of these

Downcomer liquid seal

Skirt clearance

TRUE ANSWER : ?
YOUR ANSWER : ?

If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

None of these

Increase by 21.6

Increase by 1.8

Decrease by 22

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following packing materials provides for maximum mass transfer?

Raschig rings

Cross-partition rings

All of these

Lessig rings

TRUE ANSWER : ?
YOUR ANSWER : ?

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