chemical engineering process equipment and plant design MCQs – Page 11

Practise multiple-choice questions from chemical engineering process equipment and plant design for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering process equipment and plant design Mcqs
201. Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger ?
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A. Orifice baffle

B. Disk and doughnut baffle

C. 75% cut segmental baffle

D. 25% cut segmental baffle
202. Spherical shaped pressure vessel is considered to be the most ideal, because it can___________________?
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A. Be fabricated very easily

B. Be designed without wind load considerations

C. Be supported very easily

D. Withstand higher pressure for a given metallic shell thickness
203. Cylindrical pressure vessels in horizontal condition is generally supported on a ________________ support?
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A. Guy wire

B. Saddle

C. Lug

D. Skirt

204. Pick out the wrong statement about the design of sieve plate column and the bubble cap column ?
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A. Weir length for a bubble cap plate is the same as that for the sieve plate

B. Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the

C. The downcomer design and the residence time in the downcomer is almost same for sieve

D. ve plate

E. te and bubble cap columns

F. Weir height for a bubble cap plate column is the same as that for a sieve plate column
205. Fouling factor must be included in the calculation of overall design heat transfer coefficient, when the liquid__________________?
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A. Is highly viscous

B. Containing suspended solids flows at low velocity

C. Containing suspended solids flows at high velocity

D. Is of high specific gravity

206. Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of ____________________?
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A. Making the joint leak proof

B. None of these

C. Reduction of discontinuity in shape at the junction

D. Preventing the local overstressing of the shell around the opening
207. Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if___________________?
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A. Plain carbon steel and cast iron parts are used

B. Wall thickness is > 30 mm

C. Material of construction is high alloy steel

D. Both B. & C.
208. In a _____________ riveted joint, the number of rivets decreases from the innermost row to the outermost row?
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A. Chain

B. None of these

C. Diamond

D. Zig-zag

209. Baffle width is normally taken as ______________ times the tank diameter?
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A. 0.1-0.12

B. 0.4-0.5

C. 0.2-0.45

D. 0.45-0.6

210. _____________ shaped roof is the most commonly used roof for cylindrical storage tanks?
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A. Umbrella

B. Conical

C. Dome

D. Flat

211. Holes of a sieve tray are arranged in triangular pitch of _________________ times the hole diameter?
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A. 1.5 to 2

B. 5 to 10

C. 10 to 15

D. 2.5 to 5
212. In the design of a shell and tube heat exchanger, the corrosion allowance ____________________?
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A. Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc.

B. For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe

C. ditions it is 3 mm

D. For internal cover and tube sheet is provided on both the sides

E. All A., B. & C.
213. Theoretically calculated diameter of the stripping section of the continuous rectification column is ______________ that of the enriching section?
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A. Less than

B. Either more or less (depending upon relative volatility

C. More than

D. Same as

214. Nominal size of a pipe is an indication of its _______________ diameter?
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A. Approximate

B. Outer

C. Inner

D. None of these

215. Movement of pipeline caused by thermal expansion is taken care by providing ___________________?
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A. Changes in its direction

B. Expansion joint

C. All A., B. and C.

D. Change in the shape of pipeline

216. Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about _____________ kcal/hr.m2.C?
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A. 7500

B. 1250

C. 15000

D. 2500

217. Diameter of bubble caps used in high pressure columns is ______________ as compared to that used in identical vacuum columns?
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A. Less

B. More

C. Same

D. Either A. or B.; no generalisation can be made

218. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is ________________ cms?
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A. 7.5

B. 50

C. 15

D. 5

219. Overall distillation column efficiency for most of the refinery columns can be given by (for ? = 0.07 1.4 cp and relative volatility < 4) (where ? = overall column efficiency, % ? = molal average viscosity of feed at average column temperature and pressure, cp ?p = pressure drop per tray, psi) ?
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A. ? = 0.25 log ? 1.67

B. ? = 24.6 (?p/?)

C. ? = 17 61.1 log ?

D. ? = 1.66 0.25 log ?

220. A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by_______________?
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A. (ph dh)/ph

B. (ph dh)/dh

C. (ph dh . dt/2)/ph

D. (ph dt)/ph