Environmental Engineering Part 2

Attempt Free Environmental Engineering Part 2 Here. Read The Important Civil MCQ From Below.

Q1. If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be
A. 4 mm/hr
B. lOmm/hr
C. 20 mm/hr
D. 40 mm/hr

Answer : D

Q2. The time of concentration is defined as
A. the time taken by rainfall water to run from most distant point of water shed to the inlet of sewer
B. the time required for flow of water in sewer to the point under consideration
C. sum of (a) and (b)
D. difference of (a) and (b)

Answer : C

Q3. The specific gravity of sewage is
A. much greater than 1
B. slightly less than 1
C. equal to 1
D. slightly greater than 1

Answer : D

Environmental Engineering Part 2

Q4. The waste water from bath rooms, kitchen etc. is called
A. Refuse
B. Sullage
C. Sewage
D. Garbage

Answer : B

Q5. The self cleansing velocity for all sewers in India is usually
A. less than 1.0 m/sec
B. 1.0 m/sec to 1.2 m/sec
C. 1.5 m/sec to 2.0 m/sec
D. 3.0 m/sec to 3.5 m/sec

Answer : B

Q6. Sewage that has received no purification treatment is called
A. Raw sewage
B. Untreated sewage
C. Crude sewage
D. Fresh sewage

Answer : C

Q7. The slope of sewer shall be
A. given in the direction of natural slope of ground
B. given in the direction opposite to natural slope of ground
C. zero
D. steeper than 1 in 20

Answer : A

Environmental Engineering Part 2

Q8. A street sewer into which sewer from house connections in poured is called
A. Street sewer
B. Main sewer
C. Lateral sewer
D. Head sewer

Answer : C

Q9. The design discharge for the separate sewer system shall be taken as
A. equal to dry weather flow (DWF)
B. 2xDWF
C. 3 x DWF
D. 6xDWF

Answer : D

Q10. Man hole covers are usually made of
A. Cement
B. Wood
C. Cast iron
D. Steel

Answer : C

Environmental Engineering Part 2

Q11. The design discharge for the combined sewer system shall be taken as
A. equal to rainfall
B. rainfall + DWF
C. rainfall + 2 DWF
D. rainfall + 6 DWF

Answer : C

Q12. Direct destruction to pathogenic bacteria is caused by
A. Direct exposure to sunlight
B. Oxidation
C. Chlorination
D. Filtration

Answer : C

Q13. The minimum and maximum diameters of sewers shall preferably be
A. 15 cm and 100 cm
B. 15 cm and 300 cm
C. 30 cm and 450 cm
D. 60 cm and 300cm

Answer : B

Q14. The depletion of dissolved oxygen due to B .0.D. reaction of sewage is called
A. Deoxygenation
B. Reaeration
C. Aeration
D. Oxidation

Answer : A

Q15. The main disadvantage of cement concrete sewers is
A. less strength
B. difficulty in construction
C. difficulty in transportation due to heavy weight
D. less life

Answer : C

Environmental Engineering Part 2