PLANT $71-35$ POINTS

Write all equations and calculations to receive full points. Do not forget to write the units.

In the diagram below, a pipeline runs from a water source to a field located $20$ feet lower in

elevation. The pressure at the water meter is $60$ psi $.$ The friction losses along the pipeline is $1\mathrm{.}83$ psi $.$

$(6$ pts$)$

a$.$ Calculate the pressure at the valve if no water flows through the pipeline. What is this type of pressure

called? $(3$ pts$)$

Pressure at the valve is

This type of pressure is called

b$.$ Calculate the pressure at the valve when water flows through the pipeline. What is this type of

pressure called? $(3$ pts$)$

Pressure at the valve is

This type of pressure is called

A $6-$inch pipeline must carry $500gpm$ for $\frac{3}{4}$ mile $(3960$ feet$).$ The pressure needed at the sprinklers

is $56$ psi $.$ Fill out the table to determine which pipe type results in the most hydraulic losses. Write

vour units. $(6$ pts$)$

A $6-$inch pipeline must carry $500$ gpm for $\frac{3}{4}$ mile $(3960$ feet$).$ The pressure needed at the sprinklers

is $56$ psi $.$ Fill out the table to determine which pipe type results in the most hydraulic losses. Write

vour units. $(6$ pts$)$

A $4-$inch PVC Sch $40$ manifold is connected to $30$ laterals $(2-$inch diameter$),$ each equipped with $50$

microsprayers delivering $20$ gph and operating at $25$ psi $.$ The manifold and laterals are $750-ft$ and

$1000-$ft long, respectively.

a$.$ Calculate the hydraulic losses in the laterals and the mainline $(7$ pts$)$

b$.$ Calculate the pressure required at the pump $($assume that the pump is connected to the manifold

and that there is a no elevation difference along the irrigation system$)(2$ pts$)$

PLANT $71-35$ POINTS

Write all equations and calculations to receive full points. Do not forget to write the units.

In the diagram below, a pipeline runs from a water source to a field located $20$ feet lower in

elevation. The pressure at the water meter is $60$ psi $.$ The friction losses along the pipeline is $1\mathrm{.}83$ psi $.$

$(6$ pts$)$

a$.$ Calculate the pressure at the valve if no water flows through the pipeline. What is this type of pressure

called? $(3$ pts$)$

Pressure at the valve is

This type of pressure is called

b$.$ Calculate the pressure at the valve when water flows through the pipeline. What is this type of

pressure called? $(3$ pts$)$

Pressure at the valve is

This type of pressure is called

A $6-$inch pipeline must carry $500$ gpm for $\frac{3}{4}$ mile $(3960$ feet$).$ The pressure needed at the sprinklers

is $56$ psi $.$ Fill out the table to determine which pipe type results in the most hydraulic losses. Write

vour units. $(6$ pts$)$