The closed tank of a fire engine is partly filled with water, the air space above being under pressure. a 6 cm bore connected to the tank discharges on the roof of a building 2.5 m above the level of water in the tank. the friction losses are of 45 cm of water. determine the air pressure which must be maintained in the tank to deliver 20 litres/sec on the roof.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

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