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.

View solution

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

View solution

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

View solution

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

View solution

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.

View solution

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

View solution

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

View solution

Q. Baffles may be eliminated for

View solution

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

View solution

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.

View solution

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

View solution

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

View solution

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.

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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 ?

View solution

Q. Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

View solution

Q. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.

View solution