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The fluid density will decrease

The flow pressure will decrease

The other terms won't change

The total energy will increase

If the angle a is 30^oand the density of the fluid is 1000 kg/m³, calculate the force on the fluid in the x direction (in Newtons).

A pipe bend

The flow rate at inlet (1) and outlet (2) is 2 m³/s and the pipe area is 0.5 m² in both locations.

If the area at the outlet (2) is 0.4 m², calculate the velocity in m/s.

A pipe contraction

The pipe area at the inlet (1) is 1 m² and the velocity is 0.2 m/s.

Schematic of a pipe junction

Ignoring frictional losses, what quantities will be conserved between the inlet at (1) and the outlet at (2)?

Only the momentum along a streamline

The energy head and the momentum along a streamline, and the flow rate

Only the energy head along a streamline

The energy head and the momentum along a streamline

Only the flow rate

Water is flowing from reservoir A to reservoir B. Reservoir A has a higher elevation head than Reservoir B.

Which energy equation(s) correctly describe the system shown above? Select all that apply.

Calculate the relative roughness. Enter your answers to 3 significant figures.

A pipe has a diameter of 0.2m and an relative roughness of 0.25mm.

Water is flowing at 3m/s in a pipe with a diameter of 1m and a relative roughness of 0.1mm.

Find the friction factor using the Moody diagram.

Assume a kinematic viscosity of .

0.012

0.0155

0.0125

Which of the following would have different relative roughness values? Select all that apply.

A 250 mm diameter ductile iron pipe with water flowing at 1 m/s and a 250 mm diameter ductile iron pipe with water flowing at 3 m/s.

A 250mm diameter stainless steel pipe conveying water and a 250mm diameter stainless steel pipe conveying oil.

A 300mm diameter concrete pipe and a 300mm diameter PVC pipe.

A 150mm diameter cast iron pipe and a 300mm diameter cast iron pipe.

Which of the following is the correct form of the Swarmee-Jain equation?

You have a pipe with a relative roughness of 0.02 and a Reynolds number of the flow of 10,000.

Which of the following changes would decrease the friction losses in the pipe? You can select multiple options.

Decreasing the Reynolds number of the flow (don't consider any changes resulting from changing the diameter or the velocity)

Increasing the relative roughness

Increasing the Reynolds number of the flow (don't consider any changes resulting from changing the diameter or the velocity)

Decreasing the relative roughness