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WorksheetsFluids Final Exam Review
Total questions: 19
Worksheet time: 40mins
True or False: For planar surfaces, the resultant hydrostatic force acts through the centroid of the surface.
True
False
Which force ratio properly describes Reynolds number?
Intertial forces / gravitational forces
Intertial forces / surface tension
Intertial forces / viscous forces
Intertial forces / pressure forces
Water flows steadily through the expanding circular pipe shown below. Which of the following statements is true?
V2 = (1/9)V1
V2 = (1/3)V1
V2 = 3V1
V2 = 9V1
Find the vertical force on the curved surface (R = 2') shown below.
3120 lbs
3476 lbs
1870 lbs
2512 lbs
Water flows up the pipe as shown in the figure below. Calculate the amount of head lost between the pressure gauges.
2.6 ft
5.0 ft
6.0 ft
9.0 ft
True or False: When using dimensional analysis, you need at least 3 repeating variables to form dimensionless pi groups.
True
False
Two balls of the same size are launched with a high velocity, but one ball is smooth, and one is dimpled.
Smooth; lower skin friction
Smooth; higher Reynolds number
Dimpled; lower pressure drag
Dimpled; less turbulent boundary layer
The box culvert shown below has water flowing through it. Calculate the hydraulic radius.
3.6 m
3.0 m
0.75 m
1.5 m
Determine the head loss (in inches) through 18' of 1" diameter dripline in the problem described below.
hL = 0.1 in
hL = 0.3 in
hL = 0.5 in
hL = 1.0 in
You can learn the total amount of head in some fluid at a point using either the _____ or _____.
EGL or HGL
EGL or pitot-static tube
EGL or manometer
pitot-static tube or manometer
Water flows steadily through the expanding circular pipe shown below. Which of the following statements is true?
Pressure1 < Pressure2
Pressure1 = Pressure2
Pressure1 > Pressure2
Not enough information to decide
Two tanks of the same height with identical curved surfaces are shown. Which of the following is NOT true?
The magnitudes of the vertical forces for (a) and (b) are the same.
The magnitudes of the horizontal forces for (a) and (b) are the same.
The resultant forces on both curves act through the center of curvature.
The directions of the vertical forces for (a) and (b) are the same.
What is the convective acceleration of water as it flows from left to right out of the fire hose nozzle shown below?
Positive
Negative
Zero
Local
Determine the power needed to drive the car shown below at 50mph into 15mph headwind (CD = 0.33).
4.35 hp
6.25 hp
13.72 hp
15.06 hp
Which expression describes the resultant force on the gate (with width w into the screen) due to hydrostatic pressure?
(1/2)γL2w
γL2w
(3/8)γL2w
(3/4)γL2w
Develop a suitable set of dimensionless parameters (D = diameter, ρ = density, ω = rotational speed, Q = flowrate).
π1 = ΔP/(ρω2), π2 = Q/(ωD2)
π1 = ΔPD2/ρ, π2 = Dω, π3 = Q/D3
π1 = ΔP/(ρω2D2), π2 = Q/(ωD3)
π1 = ρωD/ΔP, π2 = QD2/(ΔPρ)1/2
Based on the figure below, what is h?
2.1 ft
18.2 ft
9.0 ft
4.0 ft
Water flows through a pipe steadily at a rate 20 kg/s. Determine the horizontal force holding the pipe in place.
80 N (in the +x direction)
40 N (in the +x direction)
80 N (in the -x direction)
40 N (in the -x direction)
There is 24.736' of head loss in the 4" diameter exit pipe shown below. Which material could the pipe be made out of?
Riveted Steel
Plastic
Concrete
Cast Iron
