A fire engine raises water at the rate of 6000 litres per minute through a height of 2 m and discharges it at 10 m/s. The H.P. of the fire engine is nearly equal to: (Take acceleration due to gravity as 9.81 m/s2)

Which of the following dimensionless numbers represents the ratio of inertial force to surface tension force?

Determine PA - PB (in Pascal) for an inverted U-tube differential manometer measuring two pressure points. Specific weight of water = 9810 N/m3, specific gravity of Hg = 13.6, and g = 9.81 m/s2.