Chemical Engineering Basics MCQ Questions & Answers

81

Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.

A) Natural B) Induced C) Forced D) Chimney

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Answer & Solution

Answer: Option A

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82

Pick out the wrong statement.

A) Weldability of high carbon steel is poorer compared to low carbon steel B) Invar is a magnetic alloy C) Magnetic permeability of the diamagenetic material is less than one D) Martensitic transformation never goes to complection ( i.e., 100%) at room temperature

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Answer & Solution

Answer: Option B

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83

The instrument based on the following principle is used for the measurement of oxygen only in the flue gases.

A) Chemical absorption B) Thermal conductivity C) Infrared absorption D) Paramagnetism

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Answer & Solution

Answer: Option D

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84

Colour comparator is used to measure the

A) pH value B) Electrode potential C) Colour intensity D) None of these

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Answer & Solution

Answer: Option A

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85

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

A) A B) D C) $$\frac{1}{{\text{A}}}$$ D) $$\frac{1}{{{{\text{A}}^2}}}$$

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Answer & Solution

Answer: Option C

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86

Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by

A) Conduction B) Convection C) Both A & B D) Radiation

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Answer & Solution

Answer: Option D

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87

Pearlite comprises of

A) 87% cementite & 13% Fe B) 87% ferrite & 13% cementite C) 93.33% ferrite & 6.67% C D) 87% ferrite & 13% C

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Answer & Solution

Answer: Option B

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88

Shrinkage allowance on pattern is provided to compensate for shrinkage when the

A) Metal changes from liquid state to solid state at freezing temperature B) Solid phase temperature drops from freezing temperature to the room temperature C) Liquid metal temperature drops from pouring temperature to room temperature D) Liquid metal temperature drops from pouring temperature to freezing temperature

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Answer & Solution

Answer: Option B

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89

Out of the following, the alloy which has equal percentage of constituents, is

A) White metal B) Gun metal C) Duralumin D) Constanton

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Answer & Solution

Answer: Option D

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90

Pick out the wrong statement.

A) Annealing twins are not observed in pure aluminium, because it has higher strain energy B) Load during cold rolling can be lowered by the application of front tension C) Very fine grain structure is desirable for high temperature creep application of materials D) Soft magnetic materials are those which have less area within the hysterisis loop

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Answer & Solution

Answer: Option C

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering