chemical engineering MCQs – Page 344

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 Review each marked answer and report any item that may be outdated or unclear.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
6861. Power requirement of fans having constant wheel diameter varies _____________ fan speed?
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A. None of these

B. As cube of

C. Directly as

D. As square of

6862. At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is____________________?
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A. Zero

B. One

C. Negative

D. Infinity

6863. Galvanising is generally done on___________________?
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A. Non-ferrous metals

B. Cast iron

C. Low carbon steel

D. Stainless steel

6864. Very high sulphur in pig iron makes ___________________?
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A. All A., B. & C.

B. Its hard and machinable

C. Its brittle and malleable

D. Its casting unsound
6865. In frictional fluid flow, the quantity, (P/?) + (V2/2gc) + gz/gc) is___________________?
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A. None of these

B. Constant along a streamline

C. Not constant along a streamline

D. Increased in the direction of flow

6866. Carbon is present in the combined form (carbide) in case of______________________?
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A. Pig iron

B. Ferroalloys

C. All A., B. & C.

D. Steel

6867. Neutraliser tank used for reacting nitric acid with ammonia for the production of ammonium nitrate is made of________________?
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A. Stainless steel

B. High silicon (14%) iron

C. Aluminium

D. Copper

6868. As the impurities are oxidised, the melting point of iron___________________?
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A. Remains unchanged

B. Decreases

C. Increases

D. May increase or decrease; unpredictable

6869. Glass is corroded by________________?
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A. None of these

B. Phosphoric acid

C. Sulphuric acid

D. Fluorine (dry or wet)
6870. Work done may be calculated by the expression ? p dA for _____________ processes ?
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A. Non-flow reversible

B. Adiabatic

C. Both A. and B

D. Neither A. nor B

6871. Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the__________________?
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A. Endurance limit

B. Ultimate tensile strength (U.T.S.)

C. Elastic limit

D. None of these

6872. Which of the following metals in not used for coating of the base metal to guard it against corrosion ?
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A. Aluminium

B. Magnesium

C. Cadmium

D. Lead

6873. Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its__________________?
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A. Machinability

B. Compressive strength

C. Corrosion resistance

D. Tensile strength

6874. The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is__________________?
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A. 2

B. 1

C. < 1

D. > 1

6875. Biological shield in a nuclear power reactor is made of________________?
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A. Zircaloy

B. Cadmium

C. Concrete

D. Steel

6876. One ton of refrigeration capacity is equivalent to the heat removal rate of____________________?
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A. 200 BTU/minute

B. 200 BTU/day

C. 50 kcal/hr

D. 200 BTU/hr

6877. Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flowmeters, because their ______________ is very low/small?
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A. Specific gravity

B. Thermal conductivity

C. Electrical resistivity

D. Electrical conductivity
6878. Minimum fluidisation velocity for a specific system depends upon the___________________?
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A. Particle size

B. Fluid viscosity

C. Density of both the particle & the fluid

D. All A., B. and C.
6879. The chlorinator used in the manufacture of DDT is made of___________________?
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A. Glass

B. Teflon

C. Glass lined steel

D. Bakelite

6880. Rubber latex is an example of a ______________ fluid?
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A. Pseudo plastic

B. Newtonian

C. Dilatent

D. Bingham plastic