Fluids Question Preview (ID: 54140)
Static And Dynamic, Pressure, Density, Gauge Pressure, Buoyanc Bernoulli's Equation, Flow Rate.
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What does the buoyant force depend on?
a) Depth
b) Volume of the object
c) Density of the object
d) Density of the fluid
Water enters a pipe with a velocity of 5m/s. If the pipe gets wider...
a) The velocity decreases
b) The velocity increases
c) The flow rate decreases
d) The flow rate increases
Calculate the buoyant force of a sphere of radius 4m if it is completely submerged in water
a) 320000 N
b) 6500 N
c) 3200 N
d) 650000 N
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) 1.67 Pa
b) 3.21 Pa
c) 16.7 Pa
d) 23.1 Pa
What is the difference between the pressure on the bottom of a pool and the pressure on the water surface?
a) Rho*g*h
b) Rho*g/h
c) gh/Rho
d) 0
A car driver measures a tire pressure of 220 kPa. What is the absolute pressure in the tire?
a) 321 kPa
b) 119 kPa
c) 101 kPa
d) 220 kPa
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) 2.0 m
b) 13.1 m
c) 15.1 m
d) 3.1 m
What are the units of flow rate?
a) m/s
b) kg m/s
c) kg /s
d) kg s/m2
Calculate the total pressure on a diver who is 32 m below the surface of the water.
a) 14.9 kPa
b) 256 kPa
c) 324.6 kPa
d) 414.9 kPa
Which of the following is a true statement?
a) The rate of fluid flow depends on the height of the pipe
b) A 3kg box will have a smaller buoyant force than a 1 kg box
c) A low density fluid will have a higher flow rate than a high density fluid.
d) None of the above
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