Water

enters a pump at 350 kPa at a rate of 1 kg/s. The water leaving the pump enters

a turbine in which the pressure is reduced and electricity is produced. The

shaft power input to the pump is 1 kW and the shaft power output from the

turbine is 1 kW. Bothe the pump and turbine are 90 percent efficient. If the

elevation and velocity of the water remain constant throughout the flow and the

irreversible head loss is 1 m, the pressure of water at the turbine exit is

A

75-m-high water body that is open to the atmosphere is available. Water is run

through a turbine at a rate of 200 L/s at the bottom of the water body. The

pressure difference across the turbine is

A pump

is used to increase the pressure of water from 100 kPa to 900 kPa at a rate of 160

L/min. If the shaft power input to the pump is 3 kW, the efficiency of the pump

is

The

pressure of water is increased from 100 kPa to 900 kPa by a pump. The

mechanical energy increase of water is

Water

at 120 kPa (gage) is flowing in a horizontal pipe at a velocity of 1.15 m/s.

The pipe makes a 90° angle at the exit and the

water exits the pipe vertically into the air. The maximum height the water jet

can rise is

Water

at 80 kPa (gage) enters a horizontal pipe at a velocity of 1.7 m/s. The pipe

makes a 90° angle at the exit and the

water exits the pipe vertically into the air. Take the correction factor to be

1. If the irreversible head loss between the inlet and exit of the pipe is 3 m,

the height the water jet can rise is

The

motor of a pump consumes 1.05 hp of electricity. The pump increases the

pressure of water from 120 kPa to 1100 kPa at a rate of 35 L/min. If the motor

efficiency is 94 percent, the pump efficiency is 

The

static and stagnation pressures of a fluid in a pipe are measured by a

piezometer and a pitot tube to be 200 kPa and 210 kPa, respectively. If the

density of the fluid is 550 kg/m

Air at 100 kPa and 20°C flows in a 12-cm-diameter pipe at a rate of 9.5

kg/min. The velocity of air in the pipe is