chemical engineering MCQs – Page 51

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 Review each marked answer and report any item that may be outdated or unclear.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
1001. Permanent hardness of water can be removed by___________________?
comments icon0

A. Adding Ca(OH)2

B. None of these

C. Boiling it with Na2CO3

D. Boiling

1002. Rosin soap is added during paper manufacture to____________________?
comments icon0

A. None of these

B. Impart adhesive properties

C. Impart resistance to penetration by liquids

D. Improve opacity

1003. A mixture of chlorine & sodium bromide acts as a/an_________________?
comments icon0

A. Insecticides

B. Analgesic drug

C. Hydrogenation catalyst

D. Fire retardant
1004. The end bleaching agent used to move last traces of colour bodies from the pulp is ____________________?
comments icon0

A. SO2 gas

B. Chlorine dioxide (ClO2)

C. MgO

D. Mercaptans

1005. Phenol is mainly used____________________?
comments icon0
A. To produce phenol formaldehyde

B. To produce benzene

C. As a plasticiser for unsaturated polyester

D. To produce polyester resin

1006. Neoprene is a__________________?
comments icon0

A. Polyester

B. Monomer

C. Synthetic rubber

D. None of these

1007. Hard water____________________?
comments icon0

A. Does not affect the lather formation by soap

B. All A, B. and C

C. Pollutes the water stream

D. Is not unfit for drinking purpose
1008. 99.5% purity oxygen is used in_____________________?
comments icon0
A. All A, B, and C.

B. Hospitals for medicinal purposes

C. Gas masks and artificial breathing apparatus

D. Cutting and welding by oxy-acetylene flame

1009. DDT stands for___________________?
comments icon0

A. Dichloro-diphenyl-trichloromethane

B. Dichloro-diphenyl-trichloroethane

C. Diethyl-diphenyl-trichloromethane

D. diphenyl-dichloro-trichloromethane

1010. Pick out the wrong statement?
comments icon0

A. Processing of thermosetting plastics is ideally done by injection moulding

B. Stretch forming is a process of cold drawing

C. Mass production of seamless pipes are done by electrical resistance welding (ERW)

D. Processing of thermoplastics is ideally done by compression moulding

1011. Enzymes are organic catalysts used in the ____________________ reactions ?
comments icon0
A. Biochemical

B. Chemical

C. Electrochemical

D. Photochemical

1012. Hydrazine is used in water treatment for the removal of___________________?
comments icon0

A. Colloidal impurities

B. Chlorinous taste

C. Dissolved oxygen

D. Turbidity

1013. Manufacture of phthalic anhydride uses ______________ as a catalyst ?
comments icon0

A. Ni

B. Al2O3

C. Cr

D. V2O5
1014. Which of the following contains least amount of N2 ?
comments icon0

A. Water gas (blue gas)

B. Producer gas

C. Blast furnace gas

D. Coke oven gas
1015. Nylon-6 as compared to Nylon-66 is having higher___________________?
comments icon0

A. Hardness

B. Abrasion/resistance

C. None of these

D. Melting point

1016. Penicillin is made employing _______________ fermentation process?
comments icon0
A. Aerobic batch

B. Anaerobic batch

C. Continuous

D. None of these

1017. Separation of fresh water from sea water can be done by the _______________ operation ?
comments icon0
A. Reverse osmosis

B. Osmosis

C. Absorption

D. Adsorption

1018. Which one of the following is not an elastomer ?
comments icon0
A. None of these

B. Polyisoprene

C. Nitrile-butadiene

D. Neoprene

1019. Hydrazine (N2H4) is used mainly as a/an__________________?
comments icon0

A. Detergents additive

B. None of these

C. Rocket fuel

D. Explosive

1020. ___________________ glass is used for the manufacture of optical glass ?
comments icon0
A. Flint

B. Pyrex

C. Crookes

D. Soda