Engineering Questions with Answers - Multiple Choice Questions
Environmental Engineering MCQ’s – Hydraulic Formulae
1 - Question
The flow of sewage in the sewers is independent of its slope and geometry.
a) True
b) False
View Answer
Answer: b
Explanation: The flow of sewage in the sewers depends on flow condition, characteristic of sewage, slope and geometry of sewer, bends, transitions and roughness of the interior surface of sewer.
2 - Question
The expression of the Chezy’s formula is given by ____________
a) V = C/RS
b) V = CRS2
c) V = C (RS)1/2
d) V = C/ (RS)1/2
View Answer
Answer: c
Explanation: Chezy’s formula is given by V = C (RS)1/2 where C is the Chezy’s constant, R is the hydraulic mean radius and S is the hydraulic gradient.
3 - Question
The value of Kutter’s coefficient for cast iron is ____________
a) 0.02
b) 0.012
c) 0.12
d) 0.13Answer: b
Explanation: When the condition of interior surface is good, the value of Kutter’s coefficient for cast iron is 0.012.
View Answer
Answer: b
Explanation: When the condition of interior surface is good, the value of Kutter’s coefficient for cast iron is 0.012.
4 - Question
The value of manning’s coefficient for cement concrete is ____________
a) 0.017
b) 0.13
c) 0.013
d) 0.17
View Answer
Answer: c
Explanation: When the condition of interior surface is good, the value of Manning’s coefficient for cement concrete is 0.013.
5 - Question
Which of the following conduit material has the maximum Kutter’s coefficient in terms of good surface?
a) Brick
b) Salt glazed stoneware
c) Cast iron
d) Galvanized iron
View Answer
Answer: a
Explanation: The unglazed brick has the maximum Kutter’s coefficient in terms of good surface with the value of 0.013.
6 - Question
The value of Bazen’s constant for good earthen channels is ____________
a) 0.12
b) 1.54
c) 0.50
d) 3.17
View Answer
Answer: c
Explanation: When the type of inside surface of sewer is a good earthen channel, the value of Bazen’s constant is 0.50.
7 - Question
Which of the following has a minimum manning’s coefficient in terms of fair interior surface?
a) Plastic smooths
b) Asbestos cement
c) Brick
d) Cement concrete
View Answer
Answer: a
Explanation: Plastic smooth has the minimum Manning’s coefficient in terms of the fair interior surface with a value of 0.011.
8 - Question
Which of the following is the expression of the Manning’s formula?
a) V = R1/3 S1/2/ N
b) V = R2/3 S2/ N
c) V = R2/3 S1/2/ N
d) V = R2/3 S1/2
View Answer
Answer: c
Explanation: The Manning’s formula is given by V = R2/3 S1/2/ N where V is the velocity of flow, ‘R’ is the mean hydraulic radius, ‘S’ is the slope of the sewer and ‘N’ is the rugosity coefficient.
9 - Question
Which of the following order is correct regarding Hazen and William’s coefficient?
i. Steel pipe
ii. Cement lined pipe
iii. Wood stave pipe
iv. Asbestos cement pipe
a) i > ii > iii > iv
b) i > iii > ii > iv
c) iv > ii > iii > i
d) iv > iii > ii > i
View Answer
Answer: d
Explanation: The Hazen and William’s coefficient for Asbestos cement pipe is 140 while of Steel pipe, Cement lined pipe and Wood stave pipe are 95, 110 and 120 respectively.