972Civil EngineeringMedium
The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be________?
A0.9 cm
B1.5 m
C1.2 m
Correct answer
B. 1.5 m
Explanation
The correct answer is 1.5 m.
Correct answer
B. 1.5 m
Explanation
The correct answer is 1.5 m.
If the excavation of earth is done manually then it costs Rs. 10 per cum. A machine can excavate at a fixed cost of Rs. 4000 plus a variable cost of Rs. 2 per cum. The quantity of earth for which the cost of excavation by machine will be equal to the cost of manual excavation is________?
In the quadrantal bearing system, a whole circle bearing of 293° 30′ can be expressed as________?
The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is________?
For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of________?
For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is________?
The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known________?