A. is cheaper in initial cost than dry conservancy system
B. requires treatment before disposal
C. creates hygenic problem
D. all of the above
✅ The correct answer is option B.
Civil Engineering
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1462. For the same solid content, if the quantity of sludge with moisture content of 98% is X, then the quantity of sludge with moisture content of 96% will be__________________?
A. X/4
B. X/2
C. X
D. 2X
✅ The correct answer is option B.
1463. The pipe which is used to carry the discharge from sanitary fittings like bath rooms, kitchens etc. is called_______________?
A. waste pipe
B. soil pipe
C. vent pipe
D. antisiphonage pipe
✅ The correct answer is option A.
1464. The settling velocity of a particle in a sedimentation tank depends on__________________?
A. depth of tank
B. surface area of tank
C. both depth and surface area of tank
D. none of the above
✅ The correct answer is option B.
1465. The suitable system of sanitation for area of distributed rainfall throughout the year with less intensity is_________________?
A. separate system
B. combined system
C. partially separate system
D. partially combined system
✅ The correct answer is option B.
1466. Ground water is usually free from________________?
A. suspended impurities
B. dissolved impurities
C. both suspended and dissolved impuri¬ties
D. none of the above
✅ The correct answer is option A.
1467. For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as___________________?
A. 4.5 to 6.0
B. 6.5 to 8.0
C. 8.5 to 10.0
D. 10.5 to 12.0
✅ The correct answer is option B.
1468. The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is____________________?
A. reflux valve
B. sluice valve
C. air relief valve
D. pressure relief valve
✅ The correct answer is option A.
1469. 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
✅ The correct answer is option B.
1470. Corrosion in concrete sewers is caused by______________?
A. septic conditions
B. dissolved oxygen
C. chlorine
D. nitrogen
✅ The correct answer is option A.