Process Equipment And Plant Design Mcqs
Q.1: Pick out the wrong statement ?
A. Lug supports are less expensive than other type of supports;
B. A pipe is differentiated from a tube by the fact that a pipe has a greater wall thicknessY
C. compared to the tube
D. A reducer is used to change the direction of a pipe in a straight runE
Q.2: Pick out the wrong statement?
A. In practical operation, distillation towers having diameter 3-6 metres equipped with bubble cap (round) size of 15 cms are used
B. Height of packing in a packed tower is about 3 times the column diameter for raschig rings and about 5 to 10 times the column diameter for saddle packing
C. In a sieve tray, the minimum hole diameter is equal to the tray thicknessI
D. In a stainless steel sieve tray, the minimum hole diameter is equal to 10 times the plate thicknessc
Q.3: Pick out the wrong statement ?
A. Plate efficiency increases with increase in superficial vapour velocity till entrainment limit^
B. Increase in depth of the liquid about the slots increases the plate efficiency, particularly if the liquid depth is < 1"x
C. Too small a plate spacing can cause a low efficiency, if the vapour velocity is greater than the allowable valuep
D. None of these
Q.4: Pick out the wrong statement?
A. Riveting provides a permanent fastening method.
B. The joint made by overlapping of one plate over the other, and then riveting the two plates together with two rows of rivets is called double riveted butt joint
C. Shank diameter of the rivets should be less than the size of the hole drilled in the plate for rivetingg
D. The efficiency of a riveted joint is the ratio of the strength of the riveted joint to the strength of the solid platev
Q.5: Pick out the wrong statement?
A. The tensile strength of a brittle material is less than its compressive strengthP
B. The compressive strength of a ductile material is less than its tensile strengthP
C. In a thick cylindrical shell, the hoop stress is maximum at the inner radiusL
D. The value of crushing load is more than that of buckling load for long columnsN
Q.6: Pick out the correct statement?
A. It is preferred to use a vertical condenser for condensation of vapor from a distillation column without sub-coolingt
B. Draining of residual liquid on tray during shut down of distillation column is facilitated by weep holesh
C. Random packing a packed tower offers the advantage of lower pressure drop and higher throughput of fluids as compared to regular/stacked packing
D. Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or weldinge
Q.7: Pick out the wrong statement pertaining to the design of a basket type evaporator ?S
A. It is used for high viscosity liquor having large rate of scalingA
B. The tube bundle is suspended on bracket'
C. There is no central downtake
D. Downtake is formed by the annular space between the bundle and the shellH
Q.8: Pick out the wrong statement pertaining to a shell and tube heat exchanger ?L
A. The minimum value of baffle spacing is 50 mm,
B. The maximum value of baffle spacing is equal to the I. of the shellC
C. The maximum unsupported tube span is generally about 75 times tube diameter, but is reduced to about 60 times for aluminium, copper & alloys of these
D. Disk and doughnut baffle is the most commonly used baffle9
Q.9: Pick out the wrong statement. In an agitated vertical cylindrical reaction vessel, the___________________?j
A. Ratio of liquid depth to tank diameter (i.e. the filling ratio) recommended for most purposes is 1b
B. Filling ratio for dispersing gas in a liquid is 2 for sufficiently long contact periodV
C. Flat bottom and conical bottom vessels have low agitation efficiency for agitation of heavy solids in liquidsm
D. Dished bottom vessel has very high power consumption4
Q.10: Pick out the correct statement ?
A. When highly corrosive fluids are to be handled, the plate towers prove to be cheaper and easier to construct than packed tower~
B. Packed towers are generally preferred over plate towers, if the liquids have a foaming tendency_
C. The pressure drop through the packed towers is generally more than the pressure drop through plate towers designed for same duty
D. None of these

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