Kingdom of Saudi Arabia
Ministry of Higher Education
Majmaah University
College of Engineering
Civil Engineering Department
Exam Information
First Midterm Exam
Course code:
CE 362
Instructor:
Section number:
Exam time:
Number of pages:
Zia ur Rehman
571
Exam date:
From:
11:00 a m
6
Total score:
Student’s Information
Name:
Course Title:
Water Supply and
Sewage Engineering
To:
23/10/2014
12:30 pm
20 points
ID:
Exam Instructions:
 Read the questions carefully and several times. Writing clearly will make it
possible to assess your answers correctly.
 Any form of cheating, intention to cheating, or disruption of the exam will
subject you to a disciplinary action as specified by the university’s
regulations.
 Carrying or using the mobile phone during the exam is not allowed. Using the
phone during the exam will carry a disciplinary action.
 The calculator is only permitted by the exam supervisor.
 No student can leave the exam room during the first half hour of the exam.
Any student coming after the first half hour of the exam will not be permitted
to enter the exam.
 A student leaving the exam, even for legitimate reasons, may not be given a
makeup exam.
Points Earned:
Question
Score
Question
Score
1 (4)
3 (4)
2 (4)
4 (4)
5 (4)
Total score of the exam:
Dear student, we encourage you to answer the exam the best you can and we wish
you all success.
1
Question 1 (a): Fill in the blanks:
(0.5x4=2)
1. Physical parameter defines those characteristics of water that respond to the
sense of ………………………, ……………………….. , taste or smell.
2. Plant layout is defined as…………………………………………......................
…………………………………………………………………………………..
3. Hardness is defined as the total concentration of ………………………………
4. Hardness
(i)
0 – 50 mg/l
(ii)
50 – 150 mg/l - moderately hard
(iii)
150 – 300 mg/l - ……………………..
Question 1 (b):
- …………………….
Calculate the BOD of the following data
S. No.
Sample volume in 300
ml BOD bottle
D.O. initial
(mg/l)
D.O. final
(mg/l)
1.
2.
10 (ml)
5 (ml)
9.4
8.7
5.7
6.3
(2)
B.O.D.
(mg/l)
2
Question 2: Define the following (Any four):
(4x1=4)
1. Sewerage
2. Alkalinity
3. Chemical Oxygen Demand
4. Biochemical Oxygen Demand:
3
Question 3: Explain the importance of Color in the water quality parameter analysis
in the following headings:
(4)
Color:
Sources of color:
Impacts of color:
Measurement of color:
Uses of color: 1.
2.
4
Question 4:
0C.
The BOD5 of a wastewater sample is determined to be 250 mg/l at 20
The k value is known to be 0.23 per day. What would the BOD8 be if the test were
run at 15 0C?
(4)
5
Question 5: Calculate the Total volatile and fixed solids of a wastewater sample as
of the procedure chart given below:
(4)
6