Q. In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.

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Q. Optimum reflux ratio in a continuous distillation column is determined by the

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Q. Floating head heat exchangers are used for the

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Q. The most common standard size of bubble caps used in industrial operation is

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Q. 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.

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Q. In case of a continuous distillation column, increase in reflux ratio may result in the

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Q. In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

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Q. Generally, elliptical dished heads

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Q. Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

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Q. The circumferential (hoop) stress in a thin walled cylinderical vessel under internal pressure is

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Q. Lₑ/D for fully open gate valves would be

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Q. LMTD correction factor is used in heat exchanger design for

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Q. Pick out the wrong statement about the design of a sieve plate column.

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Q. Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.

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Q. Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.

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Q. In a __________ rivetted joint, the rivets in the various rows are opposite to each other.

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Q. Pick out the wrong statement:

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Q. Speed of industrial paddle agitator ranges from __________ rpm.

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Q. __________ strain is measured using a 'strain rosetter'.

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Q. Thin spherical shells subjected to internal pressure, develop __________ stresses.

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