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Fluids
Test Description: Static and dynamic, Pressure, density, gauge pressure, buoyanc bernoulli's equation, flow rate
Instructions: Answer all questions to get your test result.
1) What does the buoyant force depend on?
A
Depth
B
Volume of the object
C
Density of the fluid
D
Density of the object
2) Water enters a pipe with a velocity of 5m/s. If the pipe gets wider...
A
The velocity increases
B
The flow rate increases
C
The flow rate decreases
D
The velocity decreases
3) Calculate the buoyant force of a sphere of radius 4m if it is completely submerged in water
A
3200 N
B
6500 N
C
650000 N
D
320000 N
4) What is the pressure caused by a force of 50 N on a square of wood with a length 6m and a width of 5m
A
3.21 Pa
B
23.1 Pa
C
1.67 Pa
D
16.7 Pa
5) What is the difference between the pressure on the bottom of a pool and the pressure on the water surface?
A
gh/Rho
B
Rho*g*h
C
0
D
Rho*g/h
6) A car driver measures a tire pressure of 220 kPa. What is the absolute pressure in the tire?
A
119 kPa
B
321 kPa
C
220 kPa
D
101 kPa
7) Ethanol (desnity 789kg/m3) flows in a pipe at a velocity of 1m/s and at a presssure of 101.3 kPa. How far must the pipe drop in height to achieve a pressure of 2 atm? Assume the pipe has a constant area.
A
15.1 m
B
13.1 m
C
3.1 m
D
2.0 m
8) What are the units of flow rate?
A
m/s
B
kg /s
C
kg m/s
D
kg s/m2
9) Calculate the total pressure on a diver who is 32 m below the surface of the water.
A
14.9 kPa
B
414.9 kPa
C
324.6 kPa
D
256 kPa
10) Which of the following is a true statement?
A
A low density fluid will have a higher flow rate than a high density fluid.
B
A 3kg box will have a smaller buoyant force than a 1 kg box
C
The rate of fluid flow depends on the height of the pipe
D
None of the above
*select an answer for all questions
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