CE340 Test 2
Date: 27 Oct. 2010
Last Name:
First Name:
COVER PAGE
Write your name on each sheet of paper that you hand in.
Read all questions very carefully.
If the problem statement is not clear, you should
ask the proctors present to clarify if possible the question.
Pay particular attention to consistent units.
Please attempt to do all work in an organized manner, so that the papers can be graded generously.
Draw and label all diagrams neatly if they are to be considered in the grading.
Circle all main
results including the final result, which you wish to be considered in the grading. If you write on
the back of a sheet, or on additional paper, please note on your first sheet that you have done work
on additional sheets and where the additional work is to be found.
ALL RELEVANT WORK SHOULD BE SHOWN. MARKS MAY BE DEDUCTED
IF THE GRADER IS NOT ABLE TO UNDERSTAND HOW AN ANSWER WAS
OBTAINED.
Unless otherwise specified
, the fluid is water, and room temperature and standard atmospheric
pressure apply.
There are four (4) problems in total. It is highly recommended that all problems be
attempted, so budget your time accordingly.
Formulae that you may or may not find useful
h
=
4
σ
cos
θ
γ
D
E
v
=
−
dp
d
V
/
V
=
ρ
c
2
y
cp
−
y
=
I
xc
yA
−
∂
∂
l
p
γ
+
z
=
a
l
g
p
γ
+
z
+
a
0
l
g
A
=
p
γ
+
z
+
a
0
l
g
B
,
p
γ
+
z
−
ω
2
r
2
2
g
A
=
p
γ
+
z
−
ω
2
r
2
2
g
B
a
=
∂
V
s
∂
t
+
V
s
∂
V
s
∂
s
e
s
+
V
2
s
r
e
r
,
a
=
∂
u
∂
t
+
u
∂
u
∂
x
+
v
∂
u
∂
y
+
w
∂
u
∂
z
dy
dx
=
v
u
for orifices and Venturi meters,
Q
=
C
d
A
2
gh
†
1
−
(
d/D
)
4
for rectangular weirs,
Q
=
C
wr
2
3
L
w
2
gH
3
,
C
wr
= 0
.
611 + 0
.
075(
H/P
)
for triangular weirs,
Q
=
C
wt
8
15
tan
θ
2
2
gH
5
h
L
=
K
V
2
2
g
1
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
CE340 Test 2
Date: 27 Oct. 2010
Last Name:
First Name:
1. (20 points)
For each of the following multiple choice questions, choose one and only one
response, which is the most correct answer.
In addition to completing the bubble form, it
is recommended that you also indicate clearly on the test paper the answer that you have
selected.
(a) Three cases of water flow (from left to right in all cases) in an open channel are shown in
profile view, with gravity acting vertically downwards as shown. The bottom boundary
and the free surface can be taken as streamlines.
In cases I and II, these are curved,
while in case III, the streamlines are straight and parallel everywhere. The depths in all
three cases are equal (namely,
h
), at the vertical section containing the point A shown.
1
❧
In all three cases, the pressure at the bottom boundary (at point A) is
γ
h
, where
γ
is the specific weight of water.
2
❧
The pressure at A in case I is larger than the pressure at A in case II.
3
❧
Of all cases, the pressure at A in case III is least.
4
⑤
The pressure at A in case II is larger than the pressure at A in case III.
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '11
 Troy
 Thermodynamics, Force, Weir

Click to edit the document details