chemical engineering chemical engineering basics Mcqs
601. Which of the following has the highest modulus of elasticity (about 7 106 kg/cm2) ?
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A. Tungsten carbide

B. Stainless steel

C. Superalloys

D. High speed steel

603. Heat required to raise the temperature of a body by 1 C is called its_______________?
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A. Water equivalent

B. Specific heat capacity

C. Heat capacity

D. Thermal conductivity

604. Joule-Thomson co-efficient is the ratio of________________?
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A. Temperature change to pressure change occuring during adiabatic throttling of a gas

B. Temperature change to pressure change occuring during adiabatic compression of a gas

C. Pressure change to temperature change occuring during adiabatic compression of a gas

D. Pressure change to temperature change occuring during adiabatic throttling of a gas

607. Viscoelastic behaviour is observed in _______________________ materials?
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A. All amorphous

B. Ceramic

C. Non-crystalline organic polymeric

D. All crystalline

609. Tip of the match stick contains a mixture of________________?
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A. K + S + K2Cr2O7

B. K + S

C. S + K2Cr2O7 + White P

D. None of these

610. ______________ the exhaust gas is an indication of the incomplete combustion of fuel?
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A. High % of CO2 in

B. Low temperature of

C. High % of CO in

D. High temperature of

613. Pick out the wrong statement about nucleate boiling ?
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A. Heat transfer from the surface of the liquid is less than that in film boiling

B. Surface temperature is greater than the saturation temperature of the liquid

C. The temperature is less than that of film boiling

D. Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface

617. ________________ is the hardest material out of the following ?
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A. Silicon carbide

B. Boron carbide

C. Hardened steel

D. Tungsten carbide

619. The main charge in blast furnace is usually___________________?
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A. Iron ore, coke & air

B. Limestone, sand & iron ore

C. Iron ore & coke

D. Limestone, coke & iron ore
624. Holes for riveting purposes should be preferably made by________________?
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A. None of these

B. Drilling

C. Punching

D. Cutting torch

625. Function of fusible plug in a boiler is to ______________________?
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A. Put off fire in the furnace when water level in the boiler falls to unsafe limit

B. Drain out water and sludge from the boiler during repair

C. All A, B. & C

D. Guard the boiler in case of abnormal rise in steam pressure

626. The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?
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A. Hydrazine addition during feed water treatment

B. Water alkalinity & leakage

C. Release of non-condensable gas from water in the boiler

D. Scale formation

627. Adhesives__________________?
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A. Cant be used in the form of pressure sensitive tapes

B. None of these

C. Cant join two dissimilar metals

D. Cure instantaneously after application on a surface

630. Encyclopaedia of Chemical Technology has been ____________________?
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A. Edited by Kirk Othmer

B. Authored by Perry and Chilton

C. Edited by Perry and Chilton

D. Authored by Kirk Othmer

633. Electrometallurgical methods of metal extraction is normally used for those metals___________________?
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A. All A, B. & C.

B. Whose oxide/ore is not reduced by carbon

C. Which fall in the category of alkali & alkaline earth metals

D. Which stands higher in the electrochemical series of the metal

637. Cupola produces _________________ iron?
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A. Cast

B. Carbon free

C. Wrought

D. Pig

638. For dynamic strain measurement, the Wheatstone bridge used is of ______________ type ?
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A. Voltage sensitive null

B. None of these

C. Current sensitive deflected

D. Voltage sensitive deflected
639. In the acid Bessemer process, the hot metal should have the following composition ?
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A. S > 1.5% and P < 0.05%

B. S 1.5%

C. S < 0.05% and P < 0.05%

D. S < 0.05% and P < 1.5%

641. In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be________________?
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A. Lower, as it gives shorter wavelength

B. Higher, as it gives shorter wavelength

C. Lower, as it gives higher wavelength

D. Higher, as it gives higher wavelength

642. Blow off cock is provided in steam boiler to ____________________?
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A. Regulate the supply of water in boiler

B. Guard the boiler in case of abnormal rise in steam pressure

C. Drain out water and sludge during its repair

D. Put out the fire in the furnace when the water level in the boiler falls to unsafe limit

644. The order of a chemical reaction____________________?
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A. Cannot be zero

B. Can be fractional

C. Can be determined from the stoichiometry of the reaction

D. Can be determined only experimentally

646. The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system_________________?
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A. Employs minimum quantity of refrigerant

B. Has very high C.O.P.

C. Is as light as possible

D. Consumer minimum horse power