Chemical Engineering Optional Solved Questions & Answers | GkSeries

91 Triple superphosphate is made by reacting phosphoric rock with
1 phosphoric acid
2 nitric acid
3 sulphuric acid
4 hydrochloric acid

Answer: phosphoric acid
92 After feeding raw materials to the kiln till production of cement clinkers, what is the correct order of reaction zones?
1 Calcining-Drying-Clinkering
2 Drying-Calcining-Clinkering
3 Clinkering-Drying-Calcining
4 Clinkering-Calcining-Drying

Answer: Drying-Calcining-Clinkering

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93 A turbine is used to convert
1 kinetic energy to mechanical energy
2 mechanical energy to hydraulic energy
3 hydraulic energy to mechanical energy
4 None of the above

Answer: hydraulic energy to mechanical energy
94 Junker's calorimeter is used to determine the calorific value of
1 gaseous fuel
2 liquid fuel
3 pulverised coal
4 solid fuel

Answer: gaseous fuel
95 The main constituent of natural gas is
1 CH4
2 C2H2
3 C2H4
4 C2H6

Answer: CH4
96 Which of the following fraction of a crude will have maximum API (i.e., °API)?
1 Diesel
2 Gasoline
3 Atmospheric gas oil
4 Vacuum gas oil

Answer: Gasoline
97 DCDA process is the most recent process for the manufacture of
1 HN03
2 H2S04
3 HC1
4 None of the above

Answer: H2S04
98 The widely used method for conditioning of boiler feed-water is
1 cold lime process
2 coagulation
3 hot lime process
4 sequestration

Answer: hot lime process
99 In a centrifugal pump, the liquid enters the pump
1 at the centre
2 at the bottom
3 at the top
4 from the sides

Answer: at the centre
100 The most common method of producing hydrogen from hydrocarbon is known as
1 steam reforming
2 partial oxidation
3 steam blowing
4 complete oxidation

Answer: steam reforming
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