CEE 3304 Fluid Mechanics for Civil and Environmental Engineers
Exam 1 – Spring Semester, 2008
1
Problem 1
(15 points)
1
A fluid is a substance that
a) is essentially incompressible.
b) always moves when subjected to a shearing stress.
c) has a viscosity that always increases with temperature.
d) has a viscosity that always decreases with temperature.
2
Viscosity,
µ
, has dimensions of
a) FT
2
/L
b) F/TL
2
c
)
M
/
L
T
2
d) M/LT
3
Cavitation is likely to occur when:
a) Fluid pressure is high
b) Fluid’s absolute pressure reaches its vapor pressure
c) Fluid gage pressure reaches its vapor pressure
d) Fluid is highly compressed
4
A fluid that can be considered to be both incompressible and frictionless is called:
a) A laminar fluid
b) A turbulent fluid
c) A viscous fluid
d) An ideal fluid
5
According to Newton’s law of viscosity, the shear stress in a fluid is _____________.
a) inversely proportional to the depth of the fluid
b) proportional to the depth of the fluid
c) inversely proportional to the velocity gradient in the fluid
d) proportional to the velocity gradient in the fluid
6
What is the primary difference between dynamic viscosity (μ) and kinematic viscosity (
ν
)?
a) Kinematic viscosity is independent of pressure.
b) Dynamic viscosity is independent of pressure.
c) Dynamic viscosity is independent of temperature.
d) Kinematic viscosity is independent of temperature.
7
The magnitude of the buoyancy force on a submarine submerged in a lake equals:
a) The weight of the lake water displaced by the submarine
b) The weight of the submarine
c) The product of the volume of the submarine and the density of the water surrounding the submarine
d) The density of the water displaced by the submarine
8
How does the pressure in a hydrostatic fluid vary?
a) The pressure decreases exponentially with depth
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 Spring '08
 AAElSayed
 Shear Stress, environmental engineers, Environmental Engineers Exam

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