GATE-CE-2008 - CECivil Engineering Gate 2008 Paper GATE...

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CE Civil Engineering: Gate 2008 Paper GATE: 2008 CE: CIVIL ENGINEERING Q.1 The product of matrices (PQ) - P is (A) P -1 (B) Q -1 2 (C) P -1 Q -1 (D) PQP -1 d y y   is Q.2 The general solution of dx 2 0 (A) y=P cos x + Q sin x (C) y = P six x (B) y=P cos x (D) y = P sin 2 x Q.3 A mild steel specimen is under uni-axial tensile stress. Young’s modules and yield stress for mild steel are 2 x 10 5 MPa respectively. The maximum amount of strain energy per unit volume that can be stored in this specimen without permanent set is (A) 156 Nmm/mm 3 (C) 1.56 Nmm/mm 3 (B) 15.6 Nmm/mm 3 (D) 0.156 Nmm/mm 3 (B) M 20 (D) M 30 Q.5 In the design of a reinforced concrete bean the requirement for bond is not getting satisfied. The economical option to satisfy the requirement for bond is by (A) bundling of bars (B) providing smaller diameter bars more in number (C) providing larger diameter bars less in number (D) providing same diameter bars more in number Q.6 The shape of the cross-section, which has a largest shape factor, is (A) rectangular (C) diamond (B) I-section (D) solid circular Q.7 Group symbols assigned to silty sand and clayey sand are respectively (A) SS and CS (C) SM and SC (B) SM and CS (D) MS and CS Q.8 When a retaining wall moves away from the back-fill, the pressure exerted on the wall is termed as (A) Passive earth pressure (B) Swelling pressure (C) Pore pressure (D) Active earth pressure 1 Q.4 A reinforced concrete structure has to be constructed along a sea coast. The minimum grade of concrete to be used as per IS: 456-2000 is (A) M 15 (C) M 25
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CE Civil Engineering: Gate 2008 Paper Q.9 Compaction by vibratory roller is the best method of compaction in case of (A) moist silty sand (B) well graded dry sand (C) clay of medium compressibility (D) silt of high compressibility Q.10 A person standing on the bank of a canal drops a stone on the water surface. He notices that the disturbance on the water in not traveling up-stream. This is because the flow in the canal is (A) sub-critical (C) steady (B) super-critical (D) uniform Q.11 A flood wave with a known inflow hydrograph is routed through a large reservoir. The outflow hydrograph will have (A) attenuated peak with reduced time-base (B) attenuated peak with increased time-base (C) increased peak with increased time-base (D) increased peak with reduced time-base Q.12 A stable channel is to be designed for a discharge of Q m 3 /s with silt factor f as per Lacey’s method. The mean flow velocity (m/s) in the channel is obtained by (A) (Q f 2 / 140) 1/6 (C) (Q 2 f 2 / 140) 1/6 (B) (Qf / 140) 1/3 (D) 0.48 (Q / f) 1/3 Q.13 The base width of an elementary profile of gravity dam of height H is b. The specific gravity of the material of the dam is G and uplift pressure coefficient is K. the correct relationship for no tension at the heel is given by (A) (C) b H b 1 G K 1 ( ) ( ) b H b G K 1 H G K Q.14 Two primary air pollutants are (A) sulphur oxide and ozone H K G K (B) nitrogen oxide and peroxyacetylnitrate (C) sulphur oxide and hydrocarbon (D) ozone and peroxyacetynitrate Q.15 Two biodegradable components of municipal solid waste are (A) plastics and wood
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