Process Equipment and Plant Design MCQs

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

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

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

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

the most suitable for thick vertical vessel.

same as bracket support.

provided usually for vessels of much smaller height than skirt supported vessels.

all (a), (b) and (c).

tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used.

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

liquor is inside the tube while the steam is outside the tube.

all (a), (b) & (c).

(BTU/hr.ft2 . °F)-1

(kcal/hr.m2 .°C)-1

(W/m2.°K)-1

(kcal/hr. m. °C)-1

1.5 to 2

3 to 4

4 to 5

>5

5 cms

40% of the I.D. of the shell

25 cms

I.D. of the shell

type & size of packing.

fluid rates and fluid properties.

operating pressure and column diameter.

all (a), (b) and (c).

laminar flow.

complete back mixing.

plug flow.

eddy diffusivity = 0.

10

20

30

35

thick walled vertical

horizontal

thin shperical (e.g. Horton sphere)

none of these