Category: Process Equipment and Plant Design

A. 2 to 3
B. 3 to 5
C. 4 to 8
D. 6 to 12

A. pd/2t
B. pd/4t
C. pd/t
D. pd/8t

A. 0.5 to 1.5
B. 2.5 to 4.0
C. 5 to 10
D. 10 to 15

A. Plate tower is preferred, if interstage cooling is required to remove heats of reaction or
solution
B. Plate tower is preferred over packed tower, if the operation involves liquids containing
dispersed solids
C. The total weight of a dry plate tower is usually much more than that of a dry packed tower
designed for the same duty
D. In operations involving large temperature changes. (e.g. distillation), plate towers are
preferred over packed towers as the packing may be crushed due to large temperature changes

A. Permits the use of less tubes in a given shell diameter
B. Facilitates comparatively easier external cleaning because of large clearance
C. Permits the use of more tubes in a given shell diameter
D. Both B. and C.

A. Practical limit reached, due to low heat transfer rate because of inadequate temperature
difference
B. Economic limit reached, when the plant cost exceeds the saving of steam
C. Both A. & B.
D. Neither A. nor B.

A. 2.5″
B. 0.5″
C. 5″
D. 50% of the plate spacing

A. Waste steam
B. Destroy itself of acceleration wear due to rapid recycling
C. Back up condensate and cause water hammer in steam line
D. None of these

A. 0.1-0.12
B. 0.4-0.5
C. 0.45-0.6
D. 0.2-0.45

A. Safety valves are provided in heat exchangers for removal of non-condensable
B. Liquid metals and Dowtherm are used for very high temperature heating
C. In a shell and tube heat exchanger, high pressure fluid is generally routed through the tube
D. A loop seal or U-seal is provided in a vertical condenser sub-cooler to prevent quick draining
of the condensate