Q. Raw municipal solid waste (MSW) collected from a city contains 70% decomposable material that can be converted to methane. The water content of the decomposable material is 35%. An elemental analysis of the decomposable material yields the following mass percent. C : H : O : N : other = 44 : 6 :

Q. A water treatment plant treats 6000 m3 of water per day. As a part of the treatment process, discrete particles are required to be settled in a clarifier. A column test indicates that an overflow rate of 1.5 m per hour would produce the desired removal of particles through settling in the clarifier having

Q. When a specimen of M25 concrete is loaded to a stress level of 12.5 MPa, a strain of 500×10-6 is recorded. If this load is allowed to stand for a long time, the strain increases to 1000×10-6. In accordance with the provisions of IS:456-2000, considering the long-term effects, the effective modulus of elasticity of

Q. A rolled I-section beam is supported on a 75 mm wide bearing plate as shown in the figure. Thicknesses of flange and web of the I-section are 20 mm and 8 mm, respectively. Root radius of the I-section is 10 mm. Assume: material yield stress, 𝑓𝑦 = 250 𝑀𝑃𝑎 and partial safety factor for

Q. A plane frame shown in the figure (not to scale) has linear elastic springs at node H. The spring constants are kx = ky = 5 × 105 kN/m and kq = 3 × 105 kNm/rad. For the externally applied moment of 30 kNm at node F, the rotation (in degrees, round off to 3

Q. A long uniformly distributed load of 10 kN/m and a concentrated load of 60 kN are moving together on the beam ABCD shown in the figure (not drawn to scale). The relative positions of the two loads are not fixed. The maximum shear force (in kN, round off to the nearest integer) caused at

Q. A flexible pavement has the following class of loads during a particular hour of the day. The equivalent standard axle load repetitions for this vehicle combination as per IRC:37- 2012 would be (A) 180 (B) 240 (C) 250 (D) 320 Ans: 180 Solution: