Chemical Engineering Basics MCQ Questions & Answers

61

Which of the following has the highest modulus of elasticity (about 7 × 10⁶ kg/cm²)?

A) High speed steel B) Stainless steel C) Tungsten carbide D) Superalloys

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Answer & Solution

Answer: Option C

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62

Pick out the correct statement.

A) Materials exhibiting high elasticity obey Hooke's law B) The elastic behaviour of rubber under compression is the same as its behaviour under tension C) The damping capacity of a material is due to its plastic deformation D) The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations

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Answer & Solution

Answer: Option B

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63

Pick out the correct statement.

A) Hot worked materials are subjected to annealing to remove internal stresses B) Annealing of steel hardens it slightly C) Normalising of a material induces stresses D) Tempering of a material improves ductility & toughness but reducess hardness & brittlenes

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Answer & Solution

Answer: Option D

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64

Pick out the correct statement.

A) A base is always soluble in water B) Hydrogen is released whenever a metal reacts with an acid C) Sodium hydroxide is both a base and an alkali D) All of the above

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Answer & Solution

Answer: Option C

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65

Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of

A) Steel B) Glass wood C) Copper D) Fireclay bricks

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Answer & Solution

Answer: Option B

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66

Addition of silicon to aluminium improves its

A) Corrosion resistance B) Machinability C) Castability D) None of these

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Answer & Solution

Answer: Option C

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67

In continuous casting of liquid steel, the mould is made of

A) Water cooled steel B) Water cooled copper C) Refractory oxide D) Silicon carbide

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Answer & Solution

Answer: Option B

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68

The surface tension of a liquid, at critical temperature is

A) Indeterminate B) Zero C) Infinity D) Same as that at any other temperature

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Answer & Solution

Answer: Option B

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69

Identify the false statement

A) Martensitic steels are less susceptible to pitting corrosion than austenitic steels B) Pitting corrosion is usually very localised C) Hydrogen embrittlement is facilitated by tensile stress D) Stress corrosion cracking is facilitated by tensile stress

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Answer & Solution

Answer: Option A

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70

Fatigue life is expected to increase by

A) Increasing the size of the sample B) Smooth polishing of the surface of the sample C) Having compressive residual stresses at the surface D) Having tensile residual stresses at the surface

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Answer & Solution

Answer: Option C

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering