Waste Water Engineering MCQ Part 4- Environmental Engineering MCQ

Waste Water Engineering MCQ Part 4- Environmental Engineering MCQ Questions

Question No. 1
Pick up the correct statement from the following:
(A) Anaerobic bacteria flourish in the absence of oxygen
(B) Aerobic bacteria flourish in the presence of oxygen
(C) Facultative bacteria flourish with or without oxygen
(D) All the above

Question No. 2
The Brake Horse power of the motor (efficiency 60%) required for a pump of capacity 0.075 cumec for a total lift of 12 m, is
(A) 10
(B) 15
(C) 20
(D) 25

Question No. 3
Aerobic bacterias
(A) Flourish in the presence of free oxygen
(B) Consume organic matter as their food
(C) Oxidise organic matter in sewage
(D) All the above

Question No. 4
At the junction of sewers
(A) Top of smaller sewer is kept lower
(B) Top of larger sewer is kept lower
(C) Tops of both the sewers are at the same level
(D) None of these

Question No. 5
Traps
(A) Are water seals which prevent the entry of foul gases
(B) Are used to trap the rats entering sewers
(C) Dissolve the foul gases
(D) Create symphonic action to increase the quick disposal of sewerage

Question No. 6
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called
(A) Imhoff tanks
(B) Trickling filters
(C) Sludge sedimentation tanks
(D) None of these

Question No. 7
Pick up the correct statement from the following:
(A) In treated sewage, 4 ppm of D.O. is essential
(B) Only very fresh sewage contains some dissolved oxygen
(C) The solubility of oxygen in sewage is 95% that is in distilled water
(D) All the above

Question No. 8
If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is
(A) 1 in 60
(B) 1 in 100
(C) 1 in 120
(D) None of these

Question No. 9
The sewer which received discharge from two or more main sewers, is known as
(A) A trunk sewer
(B) An outfall sewer
(C) A main sewer
(D) An intercepting sewer

Question No. 10
The grit and silt of the grit chambers, may not be used for
(A) Raising low lying areas by dumping
(B) Concreting
(C) Both (a) and (b)
(D) Neither (a) nor (b)

Waste Water Engineering MCQ Part 3- Environmental Engineering MCQ Answers

Question No 1:   D

Question No 2:   C

Question No 3:   D

Question No 4:  D

Question No 5:  A

Question No 6:  B

Question No 7:  D

Question No 8:  B

Question No 9:  A

Question No 10: B

Read More: Waste Water Engineering MCQ Part 1

Read More: Waste Water Engineering MCQ Part2

Read More: Waste Water Engineering MCQ Part 3

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