chemical engineering chemical engineering basics MCQs – Page 31

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 Review each marked answer and report any item that may be outdated or unclear.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
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

602. A metal having a Poissons ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is________________?
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A. -0.8

B. -0.24

C. 0.8

D. 0.08

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

605. Dew point temperature always gives an indication of the __________________ of the moist air ?
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A. Coolness

B. Moisture content

C. Latent heat

D. Dryness

606. Strain hardening effect in a metal subjected to cold working is due to the ______________ mechanism?
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A. Dislocation

B. Fracture

C. Twinning

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

B. Ceramic

C. Non-crystalline organic polymeric

D. All crystalline

608. Austempering of steel requires it to be heated to 875C followed by sudden cooling to 250- 525C, thereby changing austenite to___________________?
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A. Sorbite

B. Troostite

C. Martensite

D. Bainite
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

611. The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ?
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A. Alcohol

B. Air

C. Water

D. Mercury

612. . The effect of friction on the flow of steam through a nozzle is to decrease the _______________ of steam?
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A. Wetness

B. Mass flow rate

C. Both A & B

D. Neither A nor B

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

614. Otto cycle used in spark ignition petrol engines is also known as the constant ________________ cycle?
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A. None of these

B. Heat

C. Pressure

D. Volume
615. The passage between the nozzle and the _______________________ is called sprue in case of injection moulding?
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A. None of these

B. Runner

C. Cylinder

D. Mold

616. The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called__________________?
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A. Impact strength

B. Resilience

C. Toughness

D. Ductility

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

618. _________________ can replace tungsten in high speed steel ?
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A. Vanadium

B. Molybdenum

C. Cobalt

D. Chromium

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
620. While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to ______________ Tm (where, Tm Melting temperature) ?
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A. 0.25

B. 0.95

C. 0.45

D. 0.70