chemical engineering process equipment and plant design MCQs – Page 13

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 Review each marked answer and report any item that may be outdated or unclear.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
241. Shortest distance between two tubes is___________________?
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A. Called tube clearance

B. Called tube pitch

C. More in case of triangular pitch as compared to square pitch of tube layout

D. None of these

242. In the design of a bag filter, the gas temperature is an important consideration, as it affects the___________________?
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A. Fibre selection

B. Gas density

C. All A., B. & C.

D. Gas viscosity

243. Pressure drop due to pipe fittings can be estimated by the equation, ?P/? = 4f, (Le/D) (V2/2gc) where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (Le/D) (dimensionless) for 45 elbow and 180 close return bends would be respectively around______________________?
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A. 180 and 300

B. 45 and 75

C. 300 and 500

D. 5 and 10

244. Rivets are generally specified by the____________________?
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A. Shank diameter

B. None of these

C. Overall length

D. Head diameter

245. Saddle supports are used for supporting _____________ vessels?
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A. Horizontal cylindrical

B. Tall vertical

C. Thick walled vertical

D. Thick spherical

246. Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or ______________ times the column diameter, whichever is lower?
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A. 15-20

B. 10-12.5

C. 5-7.5

D. 2.5-3.0
247. Which of the following factors determine the amount of entrainment in a distillation column ?
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A. Plate spacing

B. Depth of liquid above the bubble cap slots

C. All A., B. and C.

D. Vapour velocity in the volume between the plates

248. The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is ______________ stress?
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A. Shear

B. Thermal

C. Compressive

D. Tensile

249. The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called____________________?
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A. Downcomer liquid seal

B. Static submergence

C. Skirt clearance

D. None of these

250. A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator__________________?
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A. Is economical in operation

B. Employs high velocity, high heat transfer rate and less heating surface requirement

C. Employs a centrifugal pump placed between external downtake from vapor drum and inlet to

D. e bundle

E. Both B. & C.
251. The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from__________________?
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A. 4 to 8

B. 3 to 5

C. 6 to 12

D. 2 to 3

252. Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is____________?
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A. More

B. Same

C. More or less depending upon the pressure & temperature inside the vessel and the nature of

D. Less

E. fluid contained therein

253. Thickness of the frame of a plate and frame filter as compared to that of plates is___________________?
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A. Less

B. Same

C. More

D. Either A. or B.

254. In a vertical short tube evaporator (Calandria type), the ______________________?
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A. All A., B. & C.

B. mally used

C. Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylindrical drum dia of 1-6 metres are

D. rounding tube

E. Liquor is inside the tube while the steam is outside the tube

F. Area of central downtake is equal to 40 to 100% of total cross-sectional area of the

255. The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about ______________ times the design pressure?
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A. 3 to 4

B. > 5

C. 4 to 5

D. 1.5 to 2
256. Speed of the drum of the rotary vacuum filter normally ranges from _____________ rpm?
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A. 0.1 to 2

B. 8 to 15

C. 5 to 7

D. 3 to 8

257. Fresh water carrying pipelines in chemical industries are coloured with _______________ color?
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A. Sea green

B. Yellow

C. Brown

D. Red

258. Apex angle of conical heads used in the bottom heads of chemical process equipments is usually__________________?
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A. 60

B. 75

C. 30

D. 45

259. The units of Youngs modulus of elasticity and ________________ are the same?
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A. Stress

B. Modular ratio

C. Strain

D. None of these

260. The normal range of velocity of water in pipes is _______________ m/sec?
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A. 0.1-0.5

B. 15-30

C. 1-2

D. Oct-50