Q. Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

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Q. __________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids.

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Q. At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

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Q. The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress.

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Q. Baffle spacing is generally __________ the I.D. of the shell.

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Q. The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

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Q. The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

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Q. Hoop (circumferential) stress induced in a thin walled 'Horton Sphere' used for the storage of liquid ammonia under pressure is

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Q. When one of the fluids is highly corrosive and has fouling tendency, it should

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Q. A/an __________ is used for changing the direction of a pipeline.

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Q. Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube.

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Q. Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or __________ times the column diameter, whichever is lower.

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Q. Slope of countercurrent flow rotary drier is in the range of __________ meter/metre.

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Q. In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

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Q. Seamless pipe is made

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Q. Pick out the wrong statement pertaining to the design of the distillation column.

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Q. The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

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Q. In distillation columns, bubble caps are held in place over trays by

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Q. The buckling tendency of compression members is always in the direction of the

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Q. In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms.

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