Process Equipment And Plant Design - Practice Test

[#126] __________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

(A) Radial flow

(B) Cross flow

(C) Split flow

(D) Cascade

Correct Answer

(B) Cross flow

[#127] Hole diameter of the seive trays in the distillation column ranges from __________ mm.

(A) 1 to 3

(B) 4 to 8

(C) 3 to 12.5

(D) 12.5 to 18.5

Correct Answer

(C) 3 to 12.5

[#128] With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.

(A) Fixed charges initially

(B) Running cost of cooling water for condenser

(C) Vapour & liquid load both

(D) Running cost of steam for reboiler

Correct Answer

(A) Fixed charges initially

[#129] Liquid gradient over a tray can be minimised by

(A) Providing a higher skirt clearance or a higher weir

(B) Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must flow

(C) Using split flow, radial flow or cascade flow for column diameter large than 4 ft

(D) All of the above

Correct Answer

(D) All of the above

[#130] Needle valves are generally not used for

(A) Very large diameter pipes

(B) High pressure throttling service

(C) Very accurate flow control

(D) Smaller sizes of pipe

Correct Answer

(A) Very large diameter pipes

Process Equipment And Plant Design - Study Mode

[#126] __________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Correct Answer

[#127] Hole diameter of the seive trays in the distillation column ranges from __________ mm.

Correct Answer

[#128] With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.

Correct Answer

[#129] Liquid gradient over a tray can be minimised by

Correct Answer

[#130] Needle valves are generally not used for

Correct Answer