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Process Equipment and Plant Design

Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if___________________?

Process Equipment and Plant Design /
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if___________________?

A. Plain carbon steel and cast iron parts are used
B. Wall thickness is > 30 mm
C. Material of construction is high alloy steel
D. Both B. & C.

Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if___________________? Read More »

Process Equipment and Plant Design

The function of manholes provided in the shell of a distillation column is to __________________?

Process Equipment and Plant Design /
The function of manholes provided in the shell of a distillation column is to __________________?

A. Keep a check on the liquid gradient over the plate by direct visual observation
B. Give access to the individual trays for cleaning, maintenance and installation
C. Guard against foaming & entrainment by dumg antifoaming agent through it
D. All A., B. and C.

The function of manholes provided in the shell of a distillation column is to __________________? Read More »

Process Equipment and Plant Design

Pick out the wrong statement about the design of sieve plate column and the bubble cap column ?

Process Equipment and Plant Design /
Pick out the wrong statement about the design of sieve plate column and the bubble cap column ?

A. The downcomer design and the residence time in the downcomer is almost same for sieve
plate and bubble cap columns
B. Weir length for a bubble cap plate is the same as that for the sieve plate
C. Weir height for a bubble cap plate column is the same as that for a sieve plate column
D. Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the
sieve plate

Pick out the wrong statement about the design of sieve plate column and the bubble cap column ? Read More »

Process Equipment and Plant Design

Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency___________________?

Process Equipment and Plant Design /
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency___________________?

A. Increases
B. Decreases
C. Remain same
D. May increase or decrease depending upon the plate spacing

Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency___________________? Read More »

Process Equipment and Plant Design

Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure ?

Process Equipment and Plant Design /
Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure ?

A. Larger dia vessel
B. Smaller dia vessel
C. Larger dia long vessel
D. Strength of the vessel is same irrespective of the diameter

Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure ? Read More »

Process Equipment and Plant Design

For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylindrical vessel, what value of weld joint efficiency should be used ?

Process Equipment and Plant Design /
For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylindrical vessel, what value of weld joint efficiency should be used ?

A. 0.8
B. 0.9
C. 1.0
D. (0.8)0.5

For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylindrical vessel, what value of weld joint efficiency should be used ? Read More »

Process Equipment and Plant Design

In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the _____________________?

Process Equipment and Plant Design /
In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the _____________________?

A. O.D. of the tube for square pitch
B. Shortest distance between two adjacent tube holes
C. Shortest centre to centre distance between adjacent tubes
D. None of these

In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the _____________________? Read More »

Process Equipment and Plant Design