Basics of civil engineering

                                                                          UNIT 3 1)Consider the following factors pertaining the flow through soil     (1) Hydraulic gradient (2) Grain size   (3) Void ratio (4)Cross-sectional area of sample Of these, the factors affecting permeability include: 1 and 4 (b) 2 and 3 (c) 1,2 and 3 (d) 2,3 and 4 2) The upstream slope of an earth dam under safety seepage condition is   (a)equipotential lines (b)phreatic line (c) flow line (d) seepage line 3) For practically impervious type of   soil , the coeff. Of permeability is determined using   (a) variable head test (b) constant head test (c) consolidation test (d) pumping test 4)A bed of sand consist of three horizontal layers of equal thickness. The value of darcy’s for the...