Q. A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design

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Q. In a __________ rivetted joint, the number of rivets decreases from the innermost row to the outermost row.

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Q. Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about __________ percent of the total thickness.

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Q. Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is

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Q. Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.

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Q. In condenser, the cooling water is passed in the tube side in a pass arrangement, because

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Q. In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

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Q. Height of the flights in the rotary drier is in the range of

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Q. Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.

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Q. Baffles may be eliminated for

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Q. Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

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Q. In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

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Q. For pipe flows, head is proportional to __________ at constant capacity (where D = pipe diameter ).

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Q. Longitundinal stress induced in a thin walled cylindrical storage vessel is

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Q. The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is __________ stress.

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Q. The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.

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Q. Pick out the wrong statement pertaining to a shell and tube heat exchanger.

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Q. Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

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Q. Back-trapping in a distillation column results due to

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Q. For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical 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 cylinderical vessel, what value of weld joint efficiency should be used ?

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