ME 113 Winter 2015
Midterm Exam 02/04/2015
NAME: _
Discussion Session: _
Instructions (Read Carefully):
On the top margin of each page write:
o Your initial
o Your discussion section (M-11AM / M-1PM / W-1PM)
o Midterm
The exam is closed-book and closed-no
Problem 6.44
[Difficulty: 2]
Given:
Wind tunnel with inlet section
Find:
Dynamic and static pressures on centerline; compare with Speed of air at two locations
Solution:
Basic equations
p dyn =
1
2
2
air U
p
air =
Rair T
p 0 = p s + p dyn
p = w g h
p atm
Problem 2.40
[Difficulty: 2]
Given:
Velocity distribution between flat plates
Find:
Shear stress on upper plate; Sketch stress distribution
Solution:
Basic equation
du
yx =
dy
yx =
At the upper surface
Hence
y=
du
=
dy
d
dy
u max 1
2
2 y = u 4 2 y = 8
Problem 3.52
Given:
Geometry of plane gate
Find:
[Difficulty: 3]
Minimum weight to keep it closed
L=3m
h
y
L/2
dF
W
w=2m
Solution:
FR = p dA
Basic equation
MO = 0
FR = pc A
or, use computing equations
dp
= g
dh
Ixx
y' = yc +
A yc
Assumptions: static fluid
Problem 5.1
[Difficulty: 1]
The list of velocity fields provided above
Given:
Which of these fields possibly represent two-dimensional, incompressible flow
Find:
We will check these flow fields against the continuity equation
Solution:
Governing
u v w 0 (
Problem 4.38
[Difficulty: 2]
Given:
Data on flow at inlet and outlet of a reducing elbow
Find:
Find the maximum velcoity at section 1
Solution:
r
r
V dA = 0
Basic equation
CS
Assumptions: 1) Steady flow 2) Incompressible flow
Evaluating at 1, 2 and 3
h
ME 113 Winter 2015
Sample Final Exam
NAME: _
Discussion Session: _
Instructions (Read Carefully):
On the cover of your bluebook, write:
o Your name
o Your Student ID
o ME113 Final Exam
o Your discussion section (M-11AM / M-1PM / W-1PM)
You must show all o
Problem 8.86
Given:
Data on flow through Alaskan pipeline
Find:
[Difficulty: 2]
Head loss
Solution:
Basic equation
2
2
p
p
h
V1
V2
lT
1
2
+
+ z1
+
+ z2 =
= HlT
g
g
2 g
2 g
g
oil
oil
Assumptions: 1) Steady flow 2) Incompressible flow 3) at 1 an
ME113FluidMechanics
Final
3152011
100pointstotal
Firstandsecondname
StudentIDnumber
ClosedbookClosednotesIllegibleanswerswillbemarke dasincorrect
Problem 1 (25 points): A 4m long quarter circular gate of ra dius 3m and of negligible weight is hinged
abo
ME113FluidMechanics
Final
3202011
100pointstotal+20 extra
Firstandsecondname
StudentIDnumber
ClosedbookClosednotesIllegibleanswerswillbemarke dasincorrect
Problem 1 (25 points): A 4m long quarter circular gate of ra dius 3m and of negligible weight is h
_§OL U 77 Q n/
MgllM
Quiz #2 27-2012 _ 120 points totai
;.
First and second name
Student ID number
Probiem 1 (30 points): Draw the pressure distribution on the submerged surfaces below. (Draw the net
pressure on the surface = P P am) Problem 2 (90