Acentrifugal pump is required to deliver 33,6 m^3/s of water per minute against a head of 12 metres when driven at 750 r/min. the velocity of flow through the impeller is constant at 163 metres per minute. the estimated manometric efficiency will be 80% and the internal head loss in the pump calculated at 0,0276 v22 metres where v2 is in m/s. calculate : 1)- the effective area of the impeller at exit. 2)- the diameter of the impeller at exit. 3)- the outlet vane angle.

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.