261. In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.
l/5th
l/15th
l/30th
l/50th
✅ The correct answer is option B.
Process Equipment and Plant Design MCQs
262. Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.
0.1 to 0.25
0.3 to 0.5
0.5 to 0.6
0.65 to 0.80
✅ The correct answer is option A.
263. The LMTD correction factor (FT) is defined as the
ratio of true temperature difference to the LMTD.
ratio of LMTD to the true temperature difference.
differenced of true temperature difference and the LMTD.
geometric mean of the true temperature difference and the LMTD.
✅ The correct answer is option A.
264. In a heat exchanger, shell side fluid velocity can be changed by changing the tube
layout
pitch
both (a) & (b)
neither (a) nor (b)
✅ The correct answer is option C.
265. __________ shapedroof is the most commonly used roof for cylinderical storage tanks.
Conical
Flat
Dome
Umbrella
✅ The correct answer is option A.
266. For high pressure process equipments/vessels, the connected nozzle should be
welded
screwed
flanged
brazed
✅ The correct answer is option C.
267. Vertical condenser is advantageous to the horizontal condenser from operation point of view, when
hydrostatic head is required for refluxing the condensate.
only the function of condensation is to be carried out.
sub cooling of condensate is desired.
both the functions of condensation & sub cooling are carried out in a single unit.
✅ The correct answer is option D.
268. It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than
0.99
0.95
0.8
0.55
✅ The correct answer is option C.
269. The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the
equal sized reactors are the best.
smaller reactor should come first.
larger reactor should come first.
none of these.
✅ The correct answer is option B.
270. The retention time of material in a rotary dryer depends upon its
rpm
slope & length
flights arrangement
all (a), (b) and (c)
✅ The correct answer is option D.