Discussion
Which type of pipes are well suited for laying in ground liable to subsidence in case of water supply scheme?
Answer: C
Steel pipes are best for laying in ground that is liable to subsidence, since they are ductile and flexible and have long lengths with welded joints, so they can undergo some settlement and movement without breaking or leaking. Cast iron pipes are brittle, asbestos cement pipes are also brittle and break under the uneven settlement, and PVC pipes are not suited to heavy loads and soil movement in large water supply schemes.
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