176. For the determination of earth pressure, Coulomb's wedge theory assumes that:
177. The degree of kinematic indeterminacy of the rigid frame with clamped ends at A and D shown in the below figure is,
178. The dimensions for the flexural rigidity of a beam element in mass (M), length (L) and time (T) is given by
179. The centre of pressure of a liquid on a plane surface immersed vertically in a static body of liquid, always lies below the centroid of the surface area, because
180. The most commonly used sampler for obtaining a disturbed sample of the soil is
181. The two criteria for the determination of allowable bearing capacity of a foundation are
182. The time for a clay layer to achieve 90% consolidation is 15 years. The time required to achieve 90% consolidation; if the layer were twice as thick, 3 times forr permeable and 4 times more compressible would be :
183. If soil is dried beyond its shrinkage limit, it will show :
184. If YY is the centroidal axis of a T beam-section subjected to plastic moment, Mp, the neutral axis lies,
185. The expression for the specific speed of a pump :
186. A parabolic curve is used to connect a 4% upgrade with a 2% downgrade as shown in the below figure. The highest point on the summit is at a distance of (measured horizontally from the first tangent point - (FTP)
187. A deep cut of 7 m has to be made in a clay with unit weight 16 kN/m3 and a cohesion of 25 kN/m2. What will be the factor of safety if one has to have a slope angle of 30° ? Stability number is given to be 0.178 (from Taylor's chart) for a depth factor of 3.
188. An inverted siphon is a
189. The main constituents of gas generated during the anaerobic digestion of sewage sludge are :
190. Two samples of water A and B have pH values of 4.4 and 6.4 respectively. How many times more acidic sample A is than sample B ?
191. A weir on a permeable foundation with downstream sheet pile is shown in the figure below. The exit gradient as per Khosla's method is
192. Which one of the following set of values give the minimum clear cover (in mm) for the main reinforcements in the slab, beam, column and footing, respectively, according to IS : 456-1978 ?
193. Two flow patterns are represented by their stream functions ψ1 and ψ2 as given below:
ψ1 = x2 + y2, ψ2 = 2xy
If these two patterns are superimposed on one another, the resulting streamline pattern can be represented by one of the following :
194. The forces in members 'a, b, c' in the truss shown are, respectively
195. The plan of stairs supported at each end by landings spanning parallel with risers is shown in the below figure. The effective span of staircase slab is
196. The value of bearing capacity factor for cohesion, Nc, for piles as per Meyerhof, is taken as :
197. Permissible bending tensile stress in high yield strength deformed bars of grade 415 N/mm2 in a beam is :
198. The equation along a stream line holds true for :
199. An outlet irrigates an area of 20 ha. The discharge (l/s) required at this outlet to meet the evapotranspiration requirement of 20 mm occurring uniformly in 20 days neglecting other field losses is
200. A stable channel is to be designed for a discharge of Q m3 /s with silt factor f as per Lacey's method. The mean flow velocity (m/s) in the channel is obtained by