BEER with a density of 789 kg/m3 from a non-elevated open reservoir (P1=0 bars) flows before the pump at 0.75 m/s. The beer is pumped at a rate of 15 m/s to a 5 meter elevated tank with a pressure reading of 0.69 Bars. assuming zero Friction losses, Calculate the actual work if the pump's efficiency is just 44%. Calculate the theoretical and actual power in hp for a mass of 100 kg and a time of 1 minute of Beer.

In the jet impact experiment, water jet impacts on a curved vane in the vertical direction. As shown in the figure below, the exit has an angle with respect to the vertical direction. The distance from the nozzle to the vane surface at the exit is h. The water volume flow rate is measured to be Q, the density of water is p, and the cross section area of the nozzle is A₁. Assume that the flow has reached the steady state. (1) Use the Bernoulli's equation to determine the velocity Vout at the exit of the vane. Assume that friction between water and the curved vane can be neglected. (2) Apply the Reynolds transport theorem to derive the expression of the impact force F, on the curved vane (neglect the jet weight). (3) Under the condition of a fixed volume flow rate Q, determine the maximum impact force Fr,max that can be obtained when the angle varies (e.g. in different vane designs). Va out 9 Ao Vout h

A pump is used to increase the pressure of water from 105 kPa to 800 kPa at a rate of 160 L/min. If the shaft power input to the pump is 3 kW, the efficiency (expressed in decimals, such as 0.25; don't write 25%) of the pump is ?

29Water enters the impeller of a centrifugal pump radially at a flow rate of 250 L/min. The rotational speed of the impeller shaft is given as 400 rpm. Since the outer diameter of the impeller is 60 cm and the tangential component of the output velocity at this point is 55 m/s, calculate the torque (Nm) coming to the impeller.

A pump has a displacement volume of 122 cm3. It delivers 0.0027 m3/s of oil at 1720 rpm and 85 bars. If the prime mover input torque is 175 N∙m What is the overall efficiency of the pump? What is the theoretical torque required to operate the pump?

When water is pumped into a water tank 20 m above a lake with a flow rate of 70 l/s, 20.4kW of electrical power is consumed. Determine the efficiency of the pump-motor group by ignoring the friction losses in the pipes and the change in kinetic energy. Determine the pressure difference between the inlet and outlet of the pump.

A cylindrical container with a massless and frictionless piston is filled with water up to a height h, as shown in the schematic. What mass m should be placed on the piston so that the water flow rate through the opened valve doubles? Consider that piston area A₁ = 0.05 m², valve area A₂ = A1/8, h = 0.9 m, Pwater = 1000 kg/m³, and g = 9.80 m/s². piston area: A₁ m = ? Т h/5 valve area: A₂

Water flows through a garden hose at a rate of 1 l/s.  The upstream diameter of the hose is 2.5 cm, and the nozzle outlet has a diameter of 1 cm.  Determine the upstream pressure (gage pressure).

A

If you have a flat tire and need to pump up the tire on your car with a hand pump, what force do you have to apply to the pump handle?  Assume the air pressure in your tire will be 20 lb/in2, that is 1.1 KPa (138,0000 N/m2). Let the air pump have a cross-section that is 5 cm in diameter.      It depends on the weight of the car.     About 270 N when the tire is full, not much when you start pumping on the empty tire.     About 270 N for as long as it takes from the beginning.       Just a few newtons until you are satisfied with how full the tire is because of the hand pump.