In a distillation column, bubble caps are located on trays with a pitch of ______________ times the outside diameter of the caps?
A. 1.3 to 2
B. 1.6 to 2
C. 2.5
D. 1.5 to 3
A. 1.3 to 2
B. 1.6 to 2
C. 2.5
D. 1.5 to 3