Rotary drilling
A. Is not suitable for deposits containing very coarse gravel
B. Hinders the ground water observations and permeability test
C. Is not economical for holes of less than 10 cm
D. All the above
Answer: Option D
Related Questions on Building Construction
The window which is provided in flat roof of a room, is known
A. Dormer window
B. Lantern window
C. Louvered window
D. Sky window
Weep holes are provided in retaining and breast walls
A. To drain off the water from the filling
B. To ventilate the stone masonry
C. To add architectural beauty
D. To increase compaction of the earth retained
A. Haunch
B. Spandril
C. Voussoirs
D. Skewbacks
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