Process Equipment and Plant Design MCQs

Question 1

The operating pressure drop range in a bag filter is about __________ mm water gauge.

Accepted Answer

50-150

Answer

5-10

Answer

500-1500

Answer

1500-2500

Question 2

Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele's method, this method

Accepted Answer

All of the above

Answer

Is more accurate in finding the number of equilibrium stages

Answer

Accounts for the enthalpy changes in the process

Answer

Facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in this method

Question 3

The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Accepted Answer

Ellipsoidal

Answer

Flat plate

Answer

Hemispherical

Answer

Torispherical

Question 4

25% cut segmental baffle means that the baffle

Accepted Answer

Height is 75% of the I.D. of the shell

Answer

Height is 25% of the I.D. of the shell

Answer

Spacing is 75% of its height

Answer

Width is 25% of its height

Question 5

A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.

Accepted Answer

38

Answer

19

Answer

76

Answer

95

Question 6

Pick out the wrong statement:

Accepted Answer

The value of crushing load is more than that of buckling load for long colmns

Answer

The tensile strength of a brittle material is less than its compressive strength

Answer

The compressive strength of a ductile materia] is less than its tensile strength

Answer

In a thick cylindrical shell, the hoop stress is maximum at the inner radius

Question 7

With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, F T

Accepted Answer

Decreases very rapidly

Answer

Increases very rapidly

Answer

Remains constant

Answer

Increases linearly

Question 8

Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.

Accepted Answer

Twice

Answer

Half

Answer

Equal to

Answer

Eight times

Question 9

With increase in the number of shell passes, the value of F T

Accepted Answer

Increases

Answer

Decreases

Answer

Remains same

Answer

Remains same, only if the number of tube passes does not change