Basics of civil engineering

Questions and Answers   Unit 6 1 . A basic type of failure at a finite slope may occur due to ___________ a) Slope failure and Base failure b) Toe failure c) None of the mentioned d) All of the mentioned View Answer Answer: a Explanation: The two basic types of failure of a finite slope may occur: (i) slope failure (ii) base failure. 2. If the failure occurs along a surface of sliding that intersect the slope at its toe, the slide is known as ___________ a) Base failure b) Slope failure c) Face failure d) All of the mentioned View Answer Answer: b Explanation: If the failure occurs along a sliding that intersects the slopes at or above its toe, the slide is known as slope failure. 3. The types of slip surface or failure surfaces are ____________ a) 4 b) 2 c) 3 d) 5 View Answer Answer: c Explanation: The types of failure surface are: i) Planar failure surface ii) circular failure surface iii) Non-circular failure surface. 4. The ratio of total depth to depth H is called _________ a) Dep

                                                                     unit 4                                                                                                                               1)The vertical stress at depth z directly below the point P is ( k is constant) … k P/z k P/z 3 k P/z 2 k P 2 /z 1/2 2)The intensity of vertical stress σ 2 at a depth z due to point load Q acting on the surface of a semi-infinite elastic soil mass is …. (a) directly proportional to depth   (b) inversely proportional to depth   (c) directly proportional to the square of depth (d) inversely proportional to the square of depth 3) σ z is the vertical stress at depth equal to z in the soil mass due to surface point load Q . The vertical stress at depth equal to 2z will be…… (a) 0.25σ z (b) 0.5σ z (c) 1.0σ z (d) 2.0σ z 4) The change in the vertical stress in the soil mass estimated by Boussinesq’s equation when Poisson’s ratio of soil changes from 0.3 to 0.5 will be…. (a) r