1
Exam 1 Report 10/11/2017
1. Summary
Total number of students 18
Attended 18
Missed 0
Number of problems 3
Average grade 86.53
Standard deviation of grades 11.93
2. Grade distribution
3. Comparison with past years
0 0 0 1
0
5 4
8
0 2 4 6 8 10
0-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100
Number of Students
Grade
Total grade distribution
86.53 87.97 84.11 86.8 75.84 82.29 90.11
82.81
11.93 7.91 10.12 12.12 16.38
8.78 9.73 14.03
0.00 10.00 20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00
2017 2016 2015 2014 2013 2012 2010 2009
Grade
Year
Comparison with previous years
Average Standard Deviation Average Over 2009-2017
2 4. Individual problem breakdown
5. Grade distribution per problem
8.47 8.71 8.78
1.88 1.13 1.70
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
Grade
Problem
Individual scores per problem
Average
Standard Deviation
1
0 0
1
0
3
6
7
0 0 0
1 1
2
6
8
0
1
0
1 1
3 3
9
0 1 2 3 4 5 6 7 8 9 10
0-3 3-4 4-5 5-6 6-7 7-8 8-9 9-10
Number of Students
Grade
Grade distribution per problem
P1 P2 P3
3 6. Comments
OVERALL
• All students followed the rules for the formula sheet.
PROBLEM 1
• Many students had the wrong sign when implementing momentum equations.
• Few students made mistakes when calculating the x and y component of the velocities (e.g. used Vsinθ instead of Vcosθ)
PROBLEM 2
• Few students assumed pressure gradient is zero
• Few students did not evaluate the shear stress at wall and simply reported shear stress function.
• Many students did not correctly implement the flowrate equation 𝑄𝑄 =∫ 𝑢𝑢 𝑑𝑑𝑑𝑑. Few assumed constant velocity.
PROBLEM 3
• Few students made calculation error when determining the pi parameters.
• Few students assumed Δ𝑝𝑝=𝜙𝜙(𝜋𝜋1) instead of π1=𝜙𝜙(𝜋𝜋2).
