chemical engineering chemical engineering basics MCQs – Page 16

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 Review each marked answer and report any item that may be outdated or unclear.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
301. The cooling rate required to freeze 1 ton of water at 0C into ice at 0C in 24 hours is ______________ BTU/hr?
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A. 1000

B. 2000

C. 100

D. 200
302. All of the following alloying elements of steel increases hardness but sacrifice ductility, except________________?
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A. Chromium

B. Nickel

C. Vanadium

D. Molybdenum

303. During sensible heating of humid air__________________?
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A. Relative humidity increases

B. Dew point remains constant

C. Dry bulb & wet bulb temperature increases

D. Both B & C
304. As per international norms, the maximum permissible value of noise level in the industrial environment is _____________ decibels as measured at a distance of 1.5 meters from the source of noise?
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A. 85

B. 60

C. 110

D. 45

305. When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively____________________?
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A. Decreases & increases

B. Increases & increases

C. Decreases & decreases

D. Increases & decreases

306. Enzymes belong to the category of_____________________?
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A. Carbohydrates

B. Proteins

C. Vitamins

D. Fats

307. Mild steel has _______________ crystal lattice structure?
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A. Cubic

B. Orthorhombic

C. Body centred cubic (bcc)

D. Face centred cubic (fcc)

308. Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore ?
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A. Low density

B. High thermal conductivity

C. High fusibility & fluidity

D. High chemical activity

309. Auto collimator is used to check____________________?
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A. Angle

B. Rotor balancing

C. Roughness

D. Flatness

310. Ice point is designated on Fahrenheit temperature scale by__________________?
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A. 32

B. 0

C. 212

D. 62

311. Fine grained steels have____________________?
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A. None of these

B. High ductility

C. Higher tendency to distort

D. High brittleness

312. Factor of safety in machine design is defined as the ratio of ultimate stress to _____________ stress ?
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A. Working

B. None of these

C. Bearing

D. Yield

313. Gantt charts are used for streamlining the__________________?
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A. Production schedule

B. Quality control

C. Sales forecasting

D. Inventory control

314. Nitriding of a steel part does not increase its__________________?
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A. Surface hardness

B. Grain size

C. Fatigue limit

D. Wear resistance

315. Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories ?
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A. D, C, B, A

B. D, A, B, C

C. D, B, C, A

D. A, C, B, D

316. Heat flow across a hollow sphere of inner radius r1 and outer radius r2 is directly proportional to__________________?
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A. (r2 r1)/r1. r2

B. r1. r2/(r2 r1)

C. r1. r2/(r2 + r1)

D. (r2 + r1)/r1. r2

317. A jet engine turbine blade is normally manufactured by____________________?
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A. Investment casting

B. Forging

C. Pressure die casting

D. Shell moulding

318. The product of a commercial direct reduction process is___________________?
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A. Sponge iron

B. Iron saturated with carbon

C. Liquid iron

D. Solid iron

319. In a neutral solution__________________?
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A. H+ ions are absent

B. OH- ions are absent

C. Both H+ and OH- ions are present in very small but equal concentration

D. None of these

320. The trace metal present in insulin is____________________?
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A. Fe

B. Zn

C. Ni

D. Cu