chemical engineering MCQs – Page 172

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 Review each marked answer and report any item that may be outdated or unclear.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
3421. Catalyst used in the isomerisation is_______________________?
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A. Nickel

B. Phosphoric acid

C. Alumina

D. Aluminium chloride
3422. Sour crude means the ________________ bearing crude?
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A. Asphalt

B. Nitrogen compounds

C. Wax

D. Sulphur compounds
3423. Higher pressure in the reforming reactor________________?
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A. None of these

B. Produces high octane number gasoline

C. Increases coke formation

D. Increases the rate of reaction

3424. Pick out the wrong statement pertaining to the design of a horizontal tube evaporator ?
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A. Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator

B. ght = 2.5-4 metres

C. It is suitable for process, in which the final product is a liquor instead of solid

D. It is unsuitable for concentrating those liquids, which form a scale or deposit salt

E. Liquor flows inside the tube, while the steam is outside submerging the tube
3425. The LMTD correction factor (FT) is defined as the __________________?
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A. Geometric mean of the true temperature difference and the LMTD

B. Ratio of LMTD to the true temperature difference

C. Ratio of true temperature difference to the LMTD

D. Differenced of true temperature difference and the LMTD

3426. In catalytic cracking process, olefins crack ______________ times faster than in thermal cracking process?
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A. 100

B. 200-300

C. 10

D. 1000-10000
3427. Platforming is a ____________ process?
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A. Moving bed

B. Fluidised bed

C. Non-regenerative & fixed bed

D. Regenerative

3428. Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about ________________ of that of water (i.e. 1 gm/c.c)?
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A. One fourth

B. One eighth

C. One third

D. Half
3429. Molecular weight of petrol may be about ____________________?
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A. 40-60

B. 350-400

C. 250-300

D. 100-130
3430. Sulphur content in lighter and heavier petroleum products is generally determined respectively by _______________?
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A. Bomb method and quartz tube method

B. Lamp method and bomb method

C. Bomb method and lamp method

D. Quartz tube method and lamp method

3431. Crude oils containing more than ____________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a salty crude ?
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A. 15

B. 1

C. 25

D. 5
3432. Testing of the knocking characteristics of petrofuels is done in a _________________ engine ?
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A. Stirling

B. Carnot

C. Diesel

D. CFR (Co-operative fuel research)
3433. Cetane number of a diesel fuel is the measure of its____________________?
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A. Viscosity

B. Ignition delay

C. Smoke point

D. Oxidation stability

3434. Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to________________?
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A. Increase its smoke point

B. Improve its oxidation stability

C. Decrease the breathing loss

D. None of these

3435. Both asphalt and wax are produced by ______________ base crude oils?
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A. Paraffin

B. Naphthenic

C. Asphalt

D. Mixed
3436. Which of the following tests is not done for transformer oil ?
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A. Dielectric strength

B. Copper strip corrosion test

C. Flash point and acid value

D. Aniline point
3437. In solutizer sweetening process, solutizer solution used is_______________?
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A. Methanol in Unisol process

B. Naphthenic acid in Mercapsol process

C. Both A. and B.

D. Neither A. nor B.

3438. Which of the following petroleum products contain minimum sulphur ?
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A. Furnace oil

B. LSHS

C. Kerosene

D. Naphtha
3439. Visbreaking__________________?
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A. Produces fuel oil of lower viscosity

B. Uses natural gas as feed

C. Is carried out at atmospheric pressure

D. Produces gasoline only

3440. Mercaptans are________________?
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A. Undesirable in petrol, as they reduce its octane number

B. Low boiling sulphur compounds

C. Added in LPG cylinders to detect gas leakage by its smell

D. All A., B. and C.