chemical engineering chemical engineering basics MCQs – Page 23

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 Review each marked answer and report any item that may be outdated or unclear.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
441. ______________________ temperature remains constant during adiabatic saturation process of unsaturated air ?
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A. Dew point

B. None of these

C. Wet bulb

D. Dry bulb

442. Projection welding & stud welding is categorised as the _______________ welding?
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A. Resistance

B. Pressure

C. Thermit

D. Arc

443. Case hardening of a material is__________________?
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A. Done to get a soft ductile interior with a very hard surface

B. Carried out to get extreme hardness in its core

C. Followed by tempering or carburising

D. Preceded by its tempering

444. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an ______________ body?
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A. White

B. Black

C. Grey

D. Opaque

445. Which of the following is a boiler accessory i.e., not a boiler mounting ?
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A. Blow off cock

B. Feed water pump

C. Feed check valve

D. Stop valve

446. The most important consideration in value engineering is the_____________________?
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A. Cost reduction

B. Customer satisfaction

C. Profit maximisation

D. Process improvement

447. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?
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A. Conduction

B. Convection

C. Radiation

D. Both A. & B.

448. The most important requirement for aluminium industry is the availability of cheap _______________?
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A. Labour

B. Abundant water

C. Ore

D. Electrical power
449. The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the_________________?
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A. Pipe roughness & pipe diameter

B. Fluid velocity

C. Type of flowing fluid

D. Both B. & C.
450. Water hammer is caused in steam carrying pipelines, because of ______________________?
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A. High degree of superheat of steam

B. Vibration of the pipeline

C. Its exposure to torrential rain

D. Partial condensation of steam
451. In case of simple harmonic motion, displacement is proportional to the_________________?
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A. Velocity

B. Acceleration

C. Both A. & B.

D. Neither A. nor B.

452. Alloy powder manufactured by the following process have spherical shapes ?
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A. Gaseous reduction

B. Electrochemical deposition

C. Atomisation

D. Mechanical attrition

453. Wrought iron does not have__________________?
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A. Easily weldable characteristics

B. Ability to hold protective coating

C. High ductility & corrosion resistance

D. Uniform strength in all directions
454. The mechanism involved in the removal of metal in drilling operation is by_________________?
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A. Compression

B. Extrusion

C. Shearing

D. Both B & C
455. A dense structure of grinding wheel is not used for the_____________________?
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A. Ductile material

B. Hard materials

C. Finishing cuts

D. Brittle materials

456. Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA) ?
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A. Perspex

B. Lucite

C. Plexiglass

D. Styrofoam
457. Dielectric___________________?
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A. Should have high thermal conductivity

B. Need not defy the corrosive action of chemicals

C. Of low resistivity is preferred

D. Is an electrical insulating material
458. Which of the following is not an explosive ?
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A. TNT

B. Lead azide

C. RDX

D. CMC
459. One face of a furnace wall is at 1030C and the other face is exposed to room temperature (30C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is____________________?
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A. 100

B. 9000

C. 900

D. 10000
460. Dry saturated steam can be converted into super heated steam by____________________?
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A. Passing it through a pressure reducing valve

B. Increasing its cross-sectional area of flow

C. Forcing it downwards through a vertical tube

D. None of these