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26 . Pick up the correct statement from the following :
A. inclined borings are made for taking samples under existing structures
B. inclined borings are occasionally used instead of vertical holes.
C. the spacing of inclined borings is kept such that one bore hole is vertically above the bottom of an adjacent bore hole.
D. all the above.

27 . Pick up the commonly adopted geophysical method in civil engineering from the following :
A. the seisomic method
B. electrical resistivity method
C. gravitational method
D. both (a) and (b) of the above.

28 . To ensure that supporting area of an offset footing of a boundary wall is fully compressive, the C.G. of load must act
A. at the centre of the base
B. within the middle third of the base
C. within the middle fifth of the base
D. neither (a), (b) nor (c).

29 . The 9 cm x 9 cm side of a brick as seen in the wall face, is generally known as
A. stretcher B. face
C. front D. header

30 . The taper of precast concrete pile should not be more than
A. 1 cm per metre length
B. 2 cm per metre length
C. 4 cm per metre length
D. 5 cm per metre length.




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