chemical engineering chemical engineering basics MCQs – Page 37

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical engineering basics Mcqs

721. Dislocation cross-slip is difficult in those materials, which have___________________?
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A. Low stacking fault energy

B. Large number of slip systems

C. High work hardening rate

D. Coarse grain size

722. Heat transfer by ______________ is almost absent in case of fluidised bed drying operation?
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A. Radiation

B. Conduction

C. Convection

D. Both B. & C.

723. Pick out the wrong statement ?
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A. Geothermal energy is a non-conventional source of energy

B. Mass is converted into energy in both nuclear fission & fusion reaction

C. Inhalation of mercury vapour is not harmful for human beings

D. Inhalation of arsenic causes cancer

724. Silicon percentage in acid resistant cast iron is about ___________________?
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A. 14

B. 20

C. 8

D. 4

725. The atmospheric temperature during melting of ice/snow (in the atmosphere)_________________?
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A. Decreases

B. Remain same

C. Increases

D. May increase or decrease; depends on the altitude where snow melts

726. Lead is added to 60:40 brass primarily to improve_________________?
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A. Machinability

B. Corrosion resistance

C. Fluidity

D. Strength

727. Steel produced from phosphatic iron is _______________ in nature?
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A. Tough

B. Malleable

C. Ductile

D. Brittle

728. Cold heading or upsetting is categorised as the ________________ process ?
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A. Rolling

B. Bending

C. Forging

D. Extrusion

729. Dikes are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel) ?
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A. 3V

B. 2V

C. V

D. V/2

730. ____________________ metal is used as a bearing liner material?
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A. Gun

B. Babbitt

C. Pewter

D. White

731. Brazing filler metal used for joining steel plates_________________?
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A. Is copper

B. Is copper phosphorous alloy

C. Melts below the melting points of base metals

D. Melts below 300C

732. Pick out the wrong statement ?
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A. The quality of X-rays can be controlled by varying the anode-cathode voltage

B. gas by X-rays

C. Crystal structure of a material can be studied by an electron microscope

D. The X-rays cannot be deflected by electric field unlike cathode rays

E. The intensity of X-rays can be measured by ionisation current produced due to the ionisation

733. Gas turbine normally employs a constant _______________ cycle?
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A. Volume

B. Temperature

C. Pressure

D. None of these

734. The most abundant metal present in the earths crust is__________________?
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A. Copper

B. Iron

C. Titanium

D. Aluminium

735. A material subjected ________________ must have high resilience?
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A. Vibration

B. Tension

C. Shock loading

D. Fatigue

736. Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________________ method?
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A. Sinking fund

B. Multiple straight line

C. Diminishing balance

D. Sum of the years digit

737. Notched bar test is used for testing the _________________ of a material?
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A. Endurance limit

B. Corrosion resistance

C. Machinability

D. Impact strength

738. The unit of gc is ___________________?
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A. lbf/lbm. ft/sec2

B. lbm/lbf. ft/sec2

C. lbm/lbf. sec2/ft

D. ft/sec2

739. _______________ is not a case hardening process ?
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A. Annealing

B. Cyaniding

C. Nitriding

D. Carburising

740. Melting point & boiling points of liquid oxygen are respectively 218.8C & 183C, while the same for liquid nitrogen is 210C & 195.8C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8 ?
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A. R

B. C

C. F

D. K

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