Which of the following arrangements have more tubes per pass for a specified shell inside diameter, diameter of the outer tube limit, tube outside diameter, and tube pitch? (a) square (b) rotated...

Which of the following arrangements have more tubes per pass for a specified shell inside diameter, diameter of the outer tube limit, tube outside diameter, and tube pitch?

(a) square

(b) rotated square

(c) triangular

(d) can’t tell

(i). The number of tube rows N, in the flow direction in a crossflow zone with D, = 3 m, I = 0.675 m, and X = 50 mm is approximately:

(a) 33

(b) 210

(c) 120

(d) 60

(e) none of these