Q. Which of the following lengths of heat exchanger tubes are normally not used in practice ?

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Q. A pipe is generally made of circular cross-section, because a circular cross-section has the

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Q. In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hᵢ) vanishes after a Reynold number of

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Q. In inclined long tube vertical evaporators, the tubes are inclined at an angle of

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Q. In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

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Q. The wall thickness for a large high pressure pipeline is determined by the consideration of the

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Q. In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference

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Q. Skirt support is the most suitable for supporting __________ vessels.

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Q. The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.

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Q. Joint efficiency (J) for a seamless pipe is

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Q. For a given design of bubble cap, the number of bubble caps to be used per tray is set by the

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Q. The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.

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Q. The function of manholes provided in the shell of a distillation column is to

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Q. A cylindrical storage tank can have a self supported conical roof,

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Q. For high pressure process equipments/vessels, the connected nozzle should be

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Q. Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

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Q. Column support for the roof of cylindrical storage tank must be provided for

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Q. For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness ?

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Q. The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.

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Q. Oxygen carrying pipelines in chemical industries are coloured with __________ colour.

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