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EML 4304C
Test 1  Summer 2009
Name_______________________
Page
1
of
7
Each question worth 10 points.
1a)
The head loss for this system is
a)
555.1 m
b)
777.2 m
c)
421.8 m
d)
126.2 m
e)
897.2 m
f)
523.4 m
1b)
The average velocity of the oil in terms of flow rate
∀
±
and diameter
D
is
a)
2
4
D
∀
±
b)
2
4
D
π
∀
±
c)
4
D
∀
±
d)
2
4
m
D
±
e)
2
4
D
∀
±
f)
2
4
D
∀
±
1c)
Starting with the equation
2
2
L
LV
hf
Dg
=
, eliminate
V
from this equation and find head loss
h
L
in terms of friction factor
f
,
gravity
g
,
, length
L
, and diameter
D
.
∀
±
a)
2
25
8
L
f
gD
∀
±
b)
2
5
8
L
f
gD
∀
±
c)
2
5
16
L
f
∀
±
d)
2
2
L
f
∀
±
e)
2
22
16
L
f
∀
±
f)
2
16
L
f
∀
±
1d)
Using your results from the previous question (1c), find the friction factor f in terms of
h
L
,
D
,
g
,
L
, and flow rate
∀
±
.
a)
2
L
hg
D
L
∀
±
b)
2
8
L
D
L
∀
±
c)
5
2
8
L
hgD
L
∀
±
d)
24
2
8
L
D
∀
±
e)
2
8
gD
∀
±
f)
2
8
gD
L
∀
±
1e)
Assuming the flow is laminar, the friction factor in terms of Reynolds number is
a)
64
Re
b)
1.11
6.9
1.8log
Re
3.7
eD
⎡⎤
⎥
⎛⎞
+
⎢
⎜⎟
⎝⎠
⎢⎥
⎣⎦
−
c)
2.51
Re
f
d)
Re
64
e)
3.7
D
ε
f)
64
D
1f)
Using your results from the previous question (1e), find the friction factor
f
in terms of
D
, viscosity
μ
, density
ρ
, and
∀
±
.
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This note was uploaded on 09/05/2011 for the course EML 4304C taught by Professor Abbitt during the Summer '09 term at University of Florida.
 Summer '09
 ABBITT

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