The depth of excavation of foundations, is generally measured with a

bonning rod

steel tape

ranging rod

levelling staff

Correct Answer : bonning rod

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Depth of lean concrete bed placedat the bottom of a wall footing, is kept

10 cm

15 cm

equal to its projection beyond wall base

less than its projection beyond wall base

Correct Answer : Option (C) : equal to its projection beyond wall base

In ordinary residential and public buildings, the damp proof course is generally provided at

plinth level

ground level

water table level

midway ground level and watertable level.

Correct Answer : Option (A) : plinth level

In clay soil

swelling and shrinkage characteristics prevail

differential settlement is generally prevalent

consolidation continues even after several years of construction.

All of the above

Correct Answer : Option (D) : All of the above