chemical engineering MCQs – Page 21

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 Review each marked answer and report any item that may be outdated or unclear.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

401. Use of flux during soldering is done to__________________?
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A. Increase fluidity of solder by lowering its melting temperature

B. Full up the joint gap

C. Wash away surplus solder

D. Prevent oxide formation

402. Copper deposits are found in India at the following location ?
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A. Ramagundam

B. Kolar

C. Khetri

D. Kudremukh

403. Hot working of lead is carried out at ___________________?
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A. 75C

B. Room temperature

C. 150C

D. 373K

404. Which of the following commonly used condenser tube materials has the lowest thermal conductivity ?
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A. Aluminium brass

B. Admiralty brass

C. Stainless steel

D. Titanium

405. Which of the following is a commonly used manometric liquid for low pressure range ?
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A. Glycerol

B. Ethylene glycol

C. Carbon tetrachloride

D. Ethyl alcohol

406. The ratio of the shear stress to the principal stress on a principal plane is______________________?
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A. 0

B. 1

C. 3-Jan

D. 2-Jan

407. Tempering of a material does not improve its____________________?
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A. Toughness

B. Softness

C. Internal stress level

D. Machinability

408. Gantt charts are used for streamlining the__________________?
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A. Inventory control

B. Quality control

C. Production schedule

D. Sales forecasting

409. Moist climate is the most favourable factor in the site selection far a_________________?
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A. Steel plant

B. Coke oven battery

C. Textile factory

D. Petroleum refinery

410. In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet ?
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A. Alumina

B. Zirconia

C. Tungsten carbide

D. Bakelite

411. Transformation range for ferrous material is the temperature interval during which ___________________ is formed during its heating?
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A. Austenite

B. Martensite

C. Cementite

D. Pearlite

412. Eutectoid composition of carbon steel at room temperature is___________________?
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A. Pearlite

B. Ferrite

C. Cementite

D. Martensite

413. Cold cracking in the heat affected zone of a high strength steel weld can take place because of the___________________?
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A. Relatively high sulphur content in the base metal

B. Sufficient hydrogen present in the welding arc

C. Martensite formation

D. Retained austenite

414. Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as_________________?
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A. Gr0.33, Gr0.25

B. Gr0.25, Gr0.33

C. Gr0.25, Gr

D. Gr, Gr0.25

415. All of the following alloying elements of steel increases hardness but sacrifice ductility, except________________?
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A. Chromium

B. Nickel

C. Molybdenum

D. Vanadium

416. Which of the following fastening devices has a head at one end and a nut fitted to the other ?
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A. Bolt

B. Top bolt

C. None of these

D. Stud

417. The two elements required to form substitutional solid solution should not have___________________?
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A. Same valency

B. Same crystalline structure

C. Same atomic sizes

D. Widely differing electronegativity

418. The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is__________________?
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A. More

B. More but less than the diameter of bolt

C. Less

D. Same

419. Which of the following forces does not act on a fluid at rest ?
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A. Hydrostatic force

B. Viscous force

C. Surface tension force

D. Gravity force

420. Wrought iron is not____________________?
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A. Having maximum tensile strength along the lines of slag distribution

B. Having uniform strength in all directions

C. Ductile & resistant to corrosion/rusting

D. Weldable easily

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