Process Equipment and Plant Design MCQs

8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers.

4 : 1 to 8 : 1 for liquid-liquid exchanger.

< 4 : 1 for gas-gas exchangers.

both(b) & (c).

hole sizes may be around 1/8″ or 3/16″.

total hole area may be around 6 to 15% of tower cross-sectional area.

pressure drop is less compared is similar bubble cap towers.

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

0.5 d

d

1.5 d

2.5 d

20°

40°

60°

80°

1″ dia cap with 0.5″ dia riser.

6″ dia cap with 4″ dia riser.

8″ dia cap with 1″ dia riser.

4″ dia cap with 8″ dia riser.

downcomer liquid seal in case of a balanced tray design.

static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.).

skirt clearance for bubble caps.

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

shear

tensile

compressive

thermal

zero and infinity

zero and one

minimum and infinity

none of these

increases

decreases

remain unaffected

none of these