15. A pump operating at 660 hp delivers water, from a large pressurized supply tank to a large pressurized reservoir, at a rate of 150 ft’/s. Total length of the suc- tion and the discharge piping is 1000 ft. Pressures in the supply and the reservoir tanks are 30 psig and 15 psig, respectively. These pressures are maintained throughout the pumping process. Water level heights with respect to the pump centerline are 15 ft and 50 ft, respectively. Find the pipe diameter. Ignore varia- tions in water level in both tanks. [Ans.: D; = 3.5 ft]. Water Discharge piping H, Air Gate Check Valve Water Suction Valve piping Pump

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.