Waste Water Engineering MCQ Part 1- Environmental Engineering MCQ

Waste Water Engineering MCQ Part 1 Questions

Question No. 01
For a continuous flow type of sedimentation tanks
(A) Width of the tank is normally kept about 6 m
(B) Length of the tank is normally kept 4 to 5 times the width
(C) Maximum horizontal flow velocity is limited to 0.3 m/minute
(D) All the above

Question No. 02
The asbestos cement sewers are
(A) Light in weight
(B) Not structurally strong to bear large compressive stress
(C) Susceptible to corrosion by sulphuric acid
(D) All the above

Question No. 03
For efficient working of a sewer, it must be ensured that
(A) Minimum velocity of 0.45 m/sec, is maintained at its minimum flow
(B) A maximum velocity of 0.90 m/sec, is maintained at its maximum flow
(C) Both (a) and (b)
(D) Neither (a) nor (b)

Question No. 04
Pick up the correct statement from the following:
(A) The sewer pipes of sizes less than 0.4 m diameter are designed as running full at maximum
discharge
(B) The sewer pipes of sizes greater than 0.4 m diameter are designed as running 2/3rd or 3/4th
full at maximum discharge
(C) The minimum design velocity of sewer pipes is taken as 0.8 m/sec
(D) All the above

Question No. 05
Pick up the correct statement from the following:
(A) Maximum daily flow = 2 times the average daily flow
(B) Maximum daily flow = average daily flow
(C) Sewers are designed for minimum permissible velocity at minimum flow
(D) All the above

Question No. 06
Bottom openings 15 cm × 15 cm in the standing baffle wall are provided
(A) 15 cm c/c
(B) 22.5 cm c/c
(C) 30 cm c/c
(D) 50 cm c/c

Question No. 07
The pressure exerted by
(A) The sewage when running full from inside, is called internal pressure
(B) The internal pressure if any, causes tensile stress in the pipe material
(C) Pressure sewers are designed to be safe in tension
(D) All the above

Question No. 08
For drainage pipes in buildings the test applied before putting them to use, is
(A) Water test
(B) Smoke test
(C) Straightness test
(D) All the above

Question No. 09
No treatment of the sewage is given if dilution factor is
(A) Less than 150
(B) Between 150 to 200
(C) Between 200 to 300
(D) More than 500

Question No. 10
Which of the following pumps in used to pump sewage solids with liquid sewage without clogging
the pump is?
(A) Centrifugal pump
(B) Pneumatic ejector
(C) Reciprocating pump
(D) None of these

Waste Water Engineering MCQ Part 1 Answers

Question No 1:   D

Question No 2:   D

Question No 3:   C

Question No 4:  D

Question No 5:  D

Question No 6:  B

Question No 7:  D

Question No 8:  B

Question No 9:  D

Question No 10: A

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