1
Exam 3 Report 12/7/2018
1. Summary
Total number of students 12
Attended 12
Missed 0
Number of problems 5
Average grade 76.2
Standard deviation of grades 11.2
2. Grade distribution
3. Comparison with past years
0 0 0
2
1
4 4
1
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
0-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100
Number of Students
Grade
Total Grade Distribution
76.4 81.9 82.8 81.5 84.0 81.2 80.1 85.8 80.3
11.2 12.2 9.6 11.8 12.7 13.5 11.6 10.9 14.1
0.0 20.0 40.0 60.0 80.0 100.0
2018 2017 2016 2015 2014 2013 2012 2010 2009
Grade
Year
Comparison with Previous Years
Average Standard Deviation Average Over 2009-2018
2 4. Individual problem breakdown
5. Grade distribution per problem
7.98 7.79 7.56 7.42 7.46
1.44
2.39
1.56 1.62 1.98
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00
1 2 3 4 5
Grade
Problem
Individual scores per problem
Average
Standard Deviation
0 0 0
2
1
4
2
3
1
0 0
1 1 1
6
2
0
1
0 0
3
4
3
1
0 0
1
3 3
0
3
2 1
0 0
2 2
3
2 2
0 1 2 3 4 5 6 7
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 P4 P5
3 6. Comments
• Some students did not complete problems due to difficulty and/or time constraint PROBLEM 1
• Some student did not calculate the radius or the angle
• Some student did not use the Bernoulli equation for pressure calculation PROBLEM 2
• Many student did not know the definition of friction velocity
• Some student did not calculate the local Reynolds number correctly
• Some student did not use the correct equations for the friction factor calculation PROBLEM 3
• Few student made wrong assumption when simplifying the N-S equation
• Many student had difficulty solving the simplified N-S equation
• Some students did not apply correct B.C.’s Problem 4
• Many students had difficulty applying the energy equation for non-uniform velocity profile
• Some students did not know they needed to use CV method for drag calculation Problem 5
• Some students made mistakes when calculating the PI terms
• Some student did not calculate moment about point 1 to calculate drag
• Many student struggled to setup and solve system of equation for the velocity calculation (I suspect this is due to the time constraint)
