A. Triangular pitch
B. Square pitch
C. Diagonal square pitch
D. Heat transfer rate is independent of tube arrangement
A. (BTU/hr.ft2. °F)-1
B. (kcal/hr.m2.°C)-1
C. (W/m2.°K)-1
D. (kcal/hr. m. °C)-1
A. < 30
B. < 7
C. > 7 20 < 50
A. Half
B. Twice
C. Thrice
D. Five times
A. 1 to 2
B. 4 to 10
C. 10 to 20
D. 20 to 30
A. 30°
B. 45°
C. 60°
D. 75°
A. Has greater structural strength
B. Is easy to fabricate
C. Both A. and B.
D. Neither A. nor B.
A. Increase
B. Decrease
C. Remain unaffected
D. Increase or decrease depending on the nature of the dust
A. Permit release of entrained vapour in the liquid
B. Reduce the discharge fluctuation
C. Ensure better vapour-liquid contact
D. Cool the liquid before it flows down
A. 0.5 to 1.5
B. 2.5 to 4.0
C. 5 to 10
D. 10 to 15