Chemical Engineering Basics MCQ Questions & Answers

11

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

A) Below the yield point B) Above the yield point C) Below the elastic limit D) At the elastic limit

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Answer & Solution

Answer: Option A

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12

Gross national product (GNP) means the total value of __________ in a country.

A) Goods produced B) Gold reserve C) Earning of the citizens D) Taxes paid

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Answer & Solution

Answer: Option A

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13

Plastics as a material of construction suffer from the drawback of low

A) Machinability B) Density C) Strength D) Plastic deformation

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Answer & Solution

Answer: Option C

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14

Which is the only metal that exists in liquid state at room temperature?

A) Sodium B) Mercury C) Lithium D) Strontium

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Answer & Solution

Answer: Option B

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15

A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place

A) The better insulation material should be put just next to pipe (i.e., inside) B) The better insulating material should be put outside C) Either of the insulating material could be put on either side D) Steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe)

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Answer & Solution

Answer: Option A

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16

Presence of nickel & chromium in steel does not raise its

A) Elastic limit B) Machining properties C) Ductility D) Resilience

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Answer & Solution

Answer: Option A

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17

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

A) Occurs higher in the electro-chemical series of metals B) Is exemplified by magnesium plate C) Is much cheaper than the cathodic base material to be guarded against corrosion D) All of the above

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Answer & Solution

Answer: Option D

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18

In fluid flow and heat & mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are

A) μ, α and θ all have units of m/s B) μ, α and θ all have units of m²/s C) α and θ have units of m²/s, while μ has unit of m/s D) α and θ have units of m/s, while μ has unit of m²/s

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Answer & Solution

Answer: Option C

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19

Fluorine is not a constituent of

A) Freon B) Chloroform C) Teflon D) Fluorocarbons

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Answer & Solution

Answer: Option B

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20

Superheated vapour behaves like

A) Dry steam B) Gas approximately C) An ordinary vapor D) None of these

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Answer & Solution

Answer: Option B

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering