Question

Pick up the correct statement in case of water supply.

(a) Pipes laid in trenches and pipes fixed to walls are measured separately

(b) Cutting through walls and floors are included with the item

(c) Pipes are classified according to their sizes and quality

(d) Pipes laid in trenches, cutting through walls and pipes classified as per size

This question was addressed to me in my homework.

The query is from Schedule of Rates for Water Supply works topic in chapter Schedule of Rates Metric and F.B of Civil Engineering Drawing

Answer 1

Right choice is (d) Pipes laid in trenches, cutting through walls and pipes classified as per size

Easy explanation: The product, delivered to the point of consumption, is called potable water if it meets the water quality standards required for human consumption.

The water in the supply network is maintained at positive pressure to ensure that water reaches all parts of the network, that a sufficient flow is available at every take-off point and to ensure that untreated water in the ground cannot enter the network. The water is typically pressurised by pumps that pump water into storage tanks constructed at the highest local point in the network. One network may have several such service reservoirs.

In small domestic systems, the water may be pressurised by a pressure vessel or even by an underground cistern (the latter however does need additional pressurizing). This eliminates the need of a water-tower or any other heightened water reserve to supply the water pressure.