In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms. 35 20 10 30 TRUE ANSWER : ? YOUR ANSWER : ?
Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm. 30 5 10 20 TRUE ANSWER : ? YOUR ANSWER : ?
In a shell and tube heat exchanger, the 'tube pitch' is defined as the O.D. of the tube for square pitch Shortest distance between two adj acent tube holes None of these Shortest centre to centre distance between adjacent tubes TRUE ANSWER : ? YOUR ANSWER : ?
For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be __________ times. Considerably less than 9 Considerably more than 9 About 9 About 3 TRUE ANSWER : ? YOUR ANSWER : ?
Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate? Square pitch Diagonal square pitch Triangular pitch Heat transfer rate is independent of tube arrangement TRUE ANSWER : ? YOUR ANSWER : ?
Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter. 10 to 15 1.5 to 2 5 to 10 2.5 to 5 TRUE ANSWER : ? YOUR ANSWER : ?
If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of None of these D/5 or minimum 2" to D D/2 or minimum 2" to 5D D/5 or minimum 2" to 5D TRUE ANSWER : ? YOUR ANSWER : ?
Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type. Flared out Fluid in Nozzle or rim Ring plate TRUE ANSWER : ? YOUR ANSWER : ?
Pick out the wrong statement pertaining to the design of a horizontal tube evaporator. 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 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 TRUE ANSWER : ? YOUR ANSWER : ?
Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia. Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm² Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hen Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm² TRUE ANSWER : ? YOUR ANSWER : ?