Waste Water Engineering - Study Mode

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[#196] The most efficient cross section of sewers in a separate sewerage system is

(A) Parabolic

(B) Circular

(C) Rectangular

(D) New egged

Correct Answer

(B) Circular

[#197] The most efficient cross-section of sewers in a combined sewerage system is

(A) Parabolic

(B) Circular

(C) Rectangular

(D) New egged

Correct Answer

(B) Circular

[#198] The minimum diameter of a sewer is kept

(A) 10 cm

(B) 15 cm

(C) 20 cm

(D) 25 cm

Correct Answer

(B) 15 cm

[#199] In septic tanks, decomposition of organic bacteria, is done by

(A) Anaerobic bacteria

(B) Aerobic bacteria

(C) Both types of bacterias

(D) None of these

Correct Answer

(A) Anaerobic bacteria

[#200] The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is

(A) 20 cm

(B) 25 cm

(C) 40 cm

(D) 50 cm

Correct Answer

(D) 50 cm