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This quiz contains multiple-choice problems on energy losses in pipes, hydraulic gradient, series and parallel pipes, nozzle flow, water hammer and pipe network.
The energy gradient line takes into consideration
Only the potential and kinetic heads
Only the potential and pressure heads
Only the kinetic and pressure heads
The potential, kinetic and pressure heads
The hydraulic gradient line takes into consideration
Only the potential and kinetic heads
Only the potential and pressure heads
Only the kinetic and pressure heads
The potential, kinetic and pressure heads
The vertical intercept between EGL and HGL is equal to
The pressure head
The potential head
The kinetic head
The piezometric head
The slope of HGL will be
Greater than that of EGL for a pipe of uniform cross-section
Smaller than that of EGL for a pipe of uniform cross-section
Equal than that of EGL for a pipe of uniform cross-section
Independent of that of EGL for a pipe of uniform cross-section
For a nozzle, the vertical intercept between EGL and HGL
Increases
Decreases
Remains constant
May increase or decrease
For a diffuser, the vertical intercept between EGL and HGL
Increases
Decreases
Remains constant
May increase or decrease
Which of the following is a major loss?
Frictional loss
Shock loss
Entry loss
Exit loss
Which fluid property accounts for major losses in pipes?
Density
Specific gravity
Viscosity
Compressibility
The frictional resistance for fluids in motion is
Proportional to both the velocity in laminar flow and the square of the velocity in turbulent flow
Proportional to both the square of the velocity in laminar flow and the velocity in turbulent flow
Proportional to the velocity in both laminar flow and turbulent flow
Proportional to the square of the velocity in both laminar flow and turbulent flow
Which of the following is correct?
The Darcy-Weisbach formula is generally used for head loss in flow through both pipes and open channels
The Chézy formula is generally used for head loss in flow through both pipes and open channels
The Darcy-Weisbach formula is generally used for head loss in flow through both pipes and the Chézy formula for open channels
The Chézy formula is generally used for head loss in flow through both pipes and the Darcy-Weisbach formula for open channels
The head loss at the entrance of the pipe is that at its exit
Equal to
Half
Twice
Four times
A liquid flows through two similar pipes, 1 and 2. If the ratio of their flow velocities is 2:3, what will be the head loss ratio in the two pipes?
3:2
9:4
2:3
4:9
A liquid flows through pipes 1 and 2 with the same flow velocity. If the ratio of their pipe diameters is 3:2, what will be the head loss ratio in the two pipes?
3:2
9:4
2:3
4:9
A liquid flows with the same velocity through two pipes, 1 and 2, having the same diameter. If the length of the second pipe is twice that of the first pipe, what should be the head loss ratio of the two pipes?
1:2
2:1
1:4
4:1
The frictional resistance for fluids in motion varies
Slightly with temperature for both laminar and turbulent flows
Considerably with temperature for both laminar and turbulent flows
Slightly with temperature for laminar flow and considerably with temperature for turbulent flow
Considerably with temperature for laminar flow and slightly with temperature for turbulent flow
