Section 4 : Task - Bernoulli equation

BernoulliEquation

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Q.

A fire engine pump develops a head of 50 m, i.e. it increases the energy per unit weight of the water passing through it by 50 N m N-1. The pump draws water from a sump at A (Fig. 1) through a 150 mm diameter pipe in which there is a loss of energy per unit weight due to friction h1 = 5u1 /2g varying with the mean velocity u1 in the pipe, and discharges it through a 75 mm nozzle at C, 30 m above the pump, at the end of a 100 mm diameter delivery pipe in which there is a loss of energy per unit weight h2 = 12u2/2g. Calculate (1) the velocity of the jet issuing from the nozzle at C and (2) the pressure in the suction pipe at the inlet to the pump at B.

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