1
Exam 1 Report 10/14/2019
1. Summary
Total number of students 14
Attended 13
Missed 1
Number of problems 3
Average grade 82.31
Standard deviation of grades 14.98
2. Grade distribution
3. Comparison with past years
0
1
0 0 0
4 4 4
0 1 2 3 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
82.31 81.25 86.53 87.97 84.11 86.80
75.84 82.29
90.11
14.98 10.34 11.93 7.91 10.12 12.12 16.38
8.78 9.73
0.00 20.00 40.00 60.00 80.00 100.00
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
8.92
7.92 7.85
1.44 1.55
2.60
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
0 0 0 0
4
1
0
8
0
1
0 0
3 3
4
2
0 0 0
1 1 1
6
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
P1 P2 P3
3 6. Comments
PROBLEM 1
Some of students used Momentum equation incorrectly.
One student confused the Gage pressure with Hydrostatic pressure in Bernoulli's Equation.
Some of students could not use Momentum equation to get Velocity.
PROBLEM 2
Several students Missed pressure Force for calculating Moment.
Some of students did not use correct moment arm.
One student multiplied density to get Moment 𝑀⃗⃗ =𝝆(𝑟 × 𝐹 )
Some of students couldn’t use the continuity equation and calculate wrong Velocity.
Some of students indicated wrong sign at pressure term in Momentum equation.
PROBLEM 3
One student missed the pressure gradient, and another student used gravity term rather than Pressure term in N-S Equation.
One student couldn’t neglect the convection(Non-linear) term which should be canceled out with the fully developed assumption.
One student used wrong boundary condition.
Several students couldn’t integrate 𝑢(𝑦) correctly to get flow rate 𝑄̇
Some of student couldn’t use the shear stress formula 𝜏𝑤= 𝜇𝑑𝑢
𝑑𝑦
