Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around_______________?

Related Mcqs:

Cylindrical shell thickness of rotary drier is generally _______________ mm?

A. 2-3 B. 18-22 C. 6-8 D. 12-15...

Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to _____________________?

A. 5 cms B. 40% of the I.D. of the shell C. 25 cms D. I.D. of the shell...

Baffles may be eliminated for_________________?

A. Low viscosity liquids (< 200 poise) B. High viscosity liquids (> 600 poise) C. Large diameter tanks D. None of these...

Back-trapping in a distillation column results due to_________________?

A. Low gas velocity B. High gas velocity C. Excessive liquid gradient over the tray D. Low reflux ratio...

Pick out the correct statement___________________?

A. Centre to centre distance between two consecutives rivets in a row is called the pitch B. A riveted joint made in overlapping plates is called butt joint C. Hole size drilled in riveted plates is less than the actual size of the rivet D. None of these...