1
Final Exam Report 12/20/2019
1. Summary
Total number of students 12
Attended 12
Missed 0
Number of problems 6
Average grade 78.06
Standard deviation of grades 7.84
2. Grade distribution
3. Comparison with past years
0 0 0 0
3
2
7
0 0
1 2 3 4 5 6 7 8
0-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100
Number of Students
Grade
Total Grade Distribution
78.1 76.1 81.9 82.8 81.5 84.0
81.2 80.1
85.8
7.8 11.4 12.2 9.6 11.8 12.7 13.5 11.6 10.9
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
2019 2018 2017 2016 2015 2014 2013 2012 2010
Grade
Year
Comparison with Previous Years
Average Standard Deviation Average Over 2010-2019
2 4. Individual problem breakdown
5. Grade distribution per problem
8.58 9.25
6.79
8.21
6.13
7.88
1.64 1.36
2.12 1.80
1.21 1.38
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00
1 2 3 4 5 6
Grade
Problem
Individual scores per problem
AVG STD
0 0
1 1
0
2
3
5
0 0 0
1 1
0
2
8
1
0 0
6
1
0
2 2
0
1
0
1 1 1
4 4
0 0
5
3
1
3
0 0
0 0 0
2 2
4
1
3
0 1 2 3 4 5 6 7 8 9
0-3 3-4 4-5 5-6 6-7 7-8 8-9 9-10
Number of Students
Grade
Grade distribution per problem
Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6
3 6. Comments
PROBLEM 1
Several students confused Chord length with Span length for calculating Reynolds number.
Some of students made small mistake when they calculate the boundary layer thickness.
PROBLEM 2
Some of students could not consider the prototype and model scale ratio correctly.
A few of students could not think about the condition of terminal velocity which is [Weight = Drag Force], so they used wrong Drag coefficient.
Several students could not transformed the model scale velocity to prototype velocity correctly so they derived wrong answer.
PROBLEM 3
One of student multiplied ‘2’ when he consider potential source term.
Several students could not derive 𝑣𝑟, 𝑣𝜃 correctly in terms of 𝜓.
Some of students made mistake when they superimposed two source terms.
PROBLEM 4
Several students used wrong Boundary Condition.
Some of student missed gravity term in NS equation
It seems like that one of student do not know how to approach to solve this problem yet
PROBLEM 5
Some of students considered that the flow is in Cylinder pipe.
Many students did wrong when they integrate the velocity gradient.
Although some of students solved the continuity equation well, but they couldn’t solve the momentum equation correctly.
PROBLEM 6
Some of students could not find the relation between 𝑉1 and 𝑉2 correctly.
Several students could not derive the answer iteratively.
Several students could not consider the two equation {continuity and energy equation}
simultaneously and only used the energy equation.
