chemical engineering MCQs – Page 389

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
7761. Fuel economy in an industrial furnace operation cannot be achieved by the use of__________________?
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A. Non-preheated combustion air

B. Recuperators

C. Stoichiometric combustion air

D. Combustion air not enriched with oxygen

7762. Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa) ?
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A. Use coal for heating purpose

B. Gasify coal to get hydrogen from coal gas

C. Use coal as conditioner in fertiliser

D. Use coal as filler in fertiliser

7763. Reaction of phosphate rock with 98% H2SO4 produces ______________________?
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A. None of these

B. White phosphorous

C. Superphosphate

D. Ortho-phosphoric acid
7764. Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition _______________?
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A. Steam reforming of naphtha

B. Natural gas cracking

C. Electrolysis of water

D. Cryogenic removal of H2 from coke oven gas

7765. Nitrolime is chemically known as____________________?
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A. Calcium nitrate

B. Ammonium nitrate

C. None of these

D. Calcium ammonium nitrate (CAN)
7766. Which of the following is not a natural source of air pollution ?
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A. Volcanic eruptions and lightening discharges

B. None of these

C. Photochemical oxidation of organic matter

D. Biological decay of vegetable matter

7767. Pick out the wrong statement ?
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A. Red phosphorous is the most reactive allotropic form of phosphorous

B. sphorous by vaporisation followed by condensation

C. Red phosphorous, which is used in the manufacture of safety matches, is converted into white

D. Green acid is the other name of phosphoric acid produced by the reaction of phosphate rock

E. Chemically unreactive nature of red phosphorous is due to its polymeric structure

F. p; sulphuric acid

7768. Temperature and pressure in ammonia converter is_________________?
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A. 200 atm, 1000C

B. 450 atm, 550C

C. 450 atm, 1000C

D. 450 atm, 200C

7769. Color test of water is done with an instrument called__________________?
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A. Electro-chemical cell

B. Colorimeter

C. Turbidimeter

D. Tintometer
7770. Radioactive solid nuclear wastes are disposed off by _________________?
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A. Underground burial in concrete containers

B. High temperature incineration

C. Pyrolysis

D. Pathological incineration

7771. Which of the following is not a source of ozone emission in the atmosphere?
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A. Xerox machines

B. Dermatological photo-therapy equipments

C. Refrigerators

D. High voltage electrical equipments

7772. 80% less than 200 mesh size particles are called____________________?
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A. Powder

B. Smoke

C. Grit

D. Aggregates

7773. H2S present in gaseous stream can be removed by adsorption on _____________________?
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A. Limestone powder

B. Active carbon

C. Bog iron

D. Silica gel

7774. Which of the following is an adsorbent used for the removal of SO2 from gas/air ?
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A. Limestone powder or alkalised alumina

B. Silica gel

C. Active carbon

D. Bog iron

7775. Persons working in cement plants and limestone quarries are more prone to disease like__________________?
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A. Silicosis

B. Cancer

C. Asthma

D. Fluorosis (bone disease)

7776. Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?
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A. Corrosion of building materials

B. Reduction in plants productivity owing to acid rain

C. All A., B. and C.

D. Respiratory & lung disease

7777. Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?
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A. All A., B. and C.

B. Reduced strength of textiles

C. Corrosion, tarnishing & soiling of metals

D. Fading of dyes on textiles

7778. Which of the following acts as a natural source of air pollution ?
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A. None of these

B. Deforestation

C. Volcanic eruption

D. Forest fire

7779. Maximum permissible limit of mercury in human blood is ______________ micrograms/100 c.c?
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A. 82

B. 7

C. 1

D. 19

7780. Maximum allowable concentration of CO2 in air for safe working is _____________ ppm (parts per million)?
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A. 1000

B. 2000

C. 50

D. 5000