Boiler draught of 10 mm water column is equivalent to_____________________?
A. 1 kgf/m2
B. 10 kgf/m2
C. 10 kgf/mm2
D. 1 kgf/mm2
A. 1 kgf/m2
B. 10 kgf/m2
C. 10 kgf/mm2
D. 1 kgf/mm2