Multiple Choice Questions & Answers on APSC Chemical Engineering Optional | GkSeries

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31 Which is not a dimensionless parameter?
1 Reynolds number
2 Froude number
3 Atomic number
4 Mach number

Answer: Atomic number
32 The concept of boundary layer that provides important links between ideal-fluid flow and real-fluid flow
1 Reynolds
2 Prandtl
3 Mach
4 Hagen

Answer: Prandtl
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33 As per classification of materials, 'fiber glass' may be classified under
1 metals
2 ceramics
3 composites
4 polymers

Answer: composites
34 The volume of atoms in a unit cell divided by total volume of the unit cell is known as
1 atomic number
2 atomic packing factor
3 coordination number
4 crystal index

Answer: atomic packing factor
35 Which among the following is not a carbon polymorph?
1 Diamond
2 Pearl
3 Graphite
4 Fullerene

Answer: Pearl
36 Perspex is was given by
1 Aciylic sheet
2 an elastomer
3 an alloy of tin and lead
4 an aluminium foil clad with bakelite

Answer: Aciylic sheet
37 Atmospheric corrosion of metals results from their
1 slow oxidation
2 fast oxidation
3 fast hydration
4 slow hydration

Answer: slow oxidation
38 Boiler feed-water is treated to prevent
1 scaling and corrosion
2 foaming and priming
3 Both (A) and (B)
4 Neither (A) nor (B)

Answer: Both (A) and (B)
39 Which of the following is not a renewable energy?
1 Solar energy
2 Wind energy
3 Nuclear energy
4 Geothermal energy

Answer: Nuclear energy
40 Glass is corroded by
1 fluorine (dry or wet)
2 H2S04
3 H3P04
4 None of the above

Answer: fluorine (dry or wet)
41 Which of the following produces maximum pressure difference for transportation of gases?
1 Vacuum pump
2 Blower
3 Fan
4 Compressor

Answer: Compressor
42 The number of gram equivalent of solute dissolved in one litre of solution is called its
1 normality
2 molarity
3 molality
4 None of the above

Answer: normality
43 Rubber-lined pumps can be used to pump
1 caustic soda
2 chlorinated brine
3 hypochloric acid
4 All of the above

Answer: All of the above
44 In flue gas analysis by Orsat's apparatus, carbon monoxide is absorbed by
1 cuprous chloride
2 potassium hydroxide
3 alkaline pyrogallol solution
4 Non of the above

Answer: cuprous chloride
45 Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of
1 less air for combustion
2 correct amount of air for combustion
3 too much air for combustion
4 pulverised coal in boilers

Answer: too much air for combustion

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