Process Equipment and Plant Design MCQs

Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

by
16
19
28
38
✅ The correct answer is option B.

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.

by
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.

The LMTD correction factor (FT) is defined as the

by
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.

Vertical condenser is advantageous to the horizontal condenser from operation point of view, when

by
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.