Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering

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21.
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

A. Range is 15°F

B. Approach is 10°F

C. Both A & B

D. Neither A nor B

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22.
Change in volume of metals from absolute zero temperature to their melting points is

A. Almost same for all metals

B. Different for different metals

C. Less for low melting point metals

D. Less for high melting point metals

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23.
The most serious manufacturing defect from fracture toughness point of view is

A. Surface roughness

B. Pores

C. Spherical inclusion

D. Crack

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24.
Unit of surface tension in S.I. unit is

A. Watt/m

B. Joule/m²

C. Newton/m²

D. Joule/m

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25.
Limestone is added in the blast furnace (during pig iron manufacture) to

A. Form slag by combining with impurities

B. Supply heat by undergoing exothermic reaction with impurities

C. Reduce the coke consumption

D. Reduce slag viscosity

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26.
The following thermocouple may be used for measuring temperature upto 1873°K.

A. Chromel-alumel

B. Copper-constantan

C. Platinum-platinum rhodium

D. Iron-constatan

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27.
Pick out the correct combination about the role of various additives used in polymers.

A. Plasticiser : increases the polymer strength

B. Heat stabiliser : increases the maximum service temperature

C. Fillers: Does not affect the property of polymer but increases its weight

D. Lubricants: increases the flexibility of polymers

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28.
Which of the following does not discharge the dust collected as a dry solid?

A. Electrostatic precipitator

B. Wet scrubber

C. Bag filter

D. Gravity settling chamber

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29.
All of the following alloying elements of steel increases hardness but sacrifice ductility, except

A. Nickel

B. Vanadium

C. Molybdenum

D. Chromium

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30.
If the pH value of a solution of sodium chloride is 7; then what will be the pH value of the solution after its electrolysis ?

A. 7

B. < 7

C. > 7

D. 0

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering

21. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

Answer & Solution

22. Change in volume of metals from absolute zero temperature to their melting points is

Answer & Solution

23. The most serious manufacturing defect from fracture toughness point of view is

Answer & Solution

24. Unit of surface tension in S.I. unit is

Answer & Solution

25. Limestone is added in the blast furnace (during pig iron manufacture) to

Answer & Solution

26. The following thermocouple may be used for measuring temperature upto 1873°K.

Answer & Solution

27. Pick out the correct combination about the role of various additives used in polymers.

Answer & Solution

28. Which of the following does not discharge the dust collected as a dry solid?

Answer & Solution

29. All of the following alloying elements of steel increases hardness but sacrifice ductility, except

Answer & Solution

30. If the pH value of a solution of sodium chloride is 7; then what will be the pH value of the solution after its electrolysis ?

Answer & Solution

Read More Section(Chemical Engineering Basics)

21.
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

22.
Change in volume of metals from absolute zero temperature to their melting points is

23.
The most serious manufacturing defect from fracture toughness point of view is

24.
Unit of surface tension in S.I. unit is

25.
Limestone is added in the blast furnace (during pig iron manufacture) to

26.
The following thermocouple may be used for measuring temperature upto 1873°K.

27.
Pick out the correct combination about the role of various additives used in polymers.

28.
Which of the following does not discharge the dust collected as a dry solid?

29.
All of the following alloying elements of steel increases hardness but sacrifice ductility, except

30.
If the pH value of a solution of sodium chloride is 7; then what will be the pH value of the solution after its electrolysis ?