Process Equipment And Plant Design MCQ Questions & Answers

91

Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger?

A) 75% cut segmental baffle B) 25% cut segmental baffle C) Orifice baffle D) Disk and doughnut baffle

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Answer & Solution

Answer: Option B

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92

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

A) 1 B) 5 C) 15 D) 25

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Answer & Solution

Answer: Option D

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93

In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

A) $$\frac{{{\text{D}}_2^2 - {\text{D}}_1^2}}{{{\text{D}}_1^2}}$$ B) D₂ - D₁ C) $$\frac{{{\text{D}}_2^2 - {\text{D}}_1^2}}{{{\text{D}}_2^2}}$$ D) None of these

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Answer & Solution

Answer: Option A

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94

The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

A) 0.5 to 1 B) 1 to 1.5 C) 1.5 to 2 D) 2 to 2.5

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Answer & Solution

Answer: Option A

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95

The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

A) < 30 B) < 7 C) > 7 < 15 D) > 20 < 50

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Answer & Solution

Answer: Option B

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96

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

A) Is always less than arithmetic average value B) Is always more than arithmetic mean value and the geometric mean value C) Is always less than arithmetic mean value, but more than geometric mean value D) May be either more or less than geometric mean and arithmetic mean value depending upon whether the flow of stream is co-current or counter-current

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Answer & Solution

Answer: Option A

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97

The dust collection efficiency of a cyclone separator

A) Decreases with increase in gas flow rate B) Is inversely proportional to the mass of the dust particle C) Is directly proportional to the radius of the dust particle path D) None of these

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Answer & Solution

Answer: Option D

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98

Pick out the correct statement.

A) When highly corrosive fluids are to be handled, the plate towers prove to be cheaper and easier to construct than packed tower B) Packed towers are generally preferred over plate towers, if the liquids have a foaming tendency C) The pressure drop through the packed towers is generally more than the pressure drop through plate towers designed for same duty D) None of these

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Answer & Solution

Answer: Option B

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99

Pick out the correct statement.

A) It is preferred to use a vertical condenser for condensation of vapor from a distillation column without sub-cooling B) Draining of residual liquid on tray during shut down of distillation column is facilitated by weep holes C) Random packing a packed tower offers the advantage of lower pressure drop and higher throughput of fluids as compared to regular/stacked packing D) Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding

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Answer & Solution

Answer: Option D

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100

Which of the following efficiencies can be greater than 100%?

A) Overall plate efficiency B) Murphree plate efficiency C) Point efficiency D) None of these

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Answer & Solution

Answer: Option B

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Process Equipment And Plant Design MCQ Questions & Answers | Chemical Engineering