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A glycerin pump is powered by a 5-kW electric motor. The pressure differential between the outlet and the inlet of the pump at full load is measured to be 211 kPa. If the flow rate through the pump is 18 L/s and the changes in elevation and the flow velocity across the pump are negligible, the overall efficiency of the pump is
(a) 69 percent
(b) 72 percent
(c) 76 percent
(d) 79 percent
(e) 82 percent
a six-cylinder four-stroke internal combustion engine with compression ratio of 17 and displacement volume of 4.5 l is
if a 150 lbf person wants to bungee jump from a bridge that is 400 feet above the surface of a river and the bungee
In a process for concentrating 1000kg of freshly extracted orange juice containing 12.5 wt% solids, the juice is strained, yielding 800kg of strained juice and 200kg of pulpy juice. The strained juice is concentrated in a vacuum evaporator to give an..
methane is preheated to 80 c degree and is burned in 20 percent excess air that is preheated 200 c degree in a
A tank of CO2 has a volume of 0.15 m^3, contains 0.8 kg of CO2 at a pressure of 453.4 kPa. 10% percent of the mass is removed in such a way that the pressure falls to 371.8 kPa. Determine the internal energy change for this process.
a set of steel reinforcing rods is to be stretched axially in tension to create a tensile stress of 30ksi prior to
You are asked to measure non-destructively the yield strength and tensile strength of an annealed 65-45-12 cast iron structural member. Fortunately, a small hardness indentation in this structural design will not impair its future usefulness, which i..
a small rankine power plant produces 25 kgs of steam at 3 mpa and 600degc in the boiler. it uses water from a river to
on an overflow structure of 50 degrees slope the water depth measured normal to the surface of the structure is 1.2 m 4
a very thin electric heater is wrapped around the outer surface of a long cylindrical tube whose inner surface is
water vapor enters a turbine operating at steady state at 30 mpa 600 oc and expands adiabatically to 6 mpa. if the
A 1/10th scale model of an airplane is to be tested in a wind tunnel that operates with air at a pressure of 20 atmospheres. The plane is expected to fly at a speed of 500 [km/hr]. What speed should the wind tunnel be run?
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