gate questions

Q. The notation “SC” as per Indian Standard Soil Classification System refers to (A) Sandy clay (B) Silty clay (C) Clayey silt (D) Clayey sand Ans:Clayey sand Solution: In the Indian Standard Soil Classification System, “SC” is used to denote soils that are clayey silt in nature. This means the soil contains a significant proportion […]

Q. An inflow hydrograph is routed through a reservoir to produce an outflow hydrograph. The peak flow of the inflow hydrograph is PI and the time of occurrence of the peak is tI. The peak flow of the outflow hydrograph is PO and the time of occurrence of the peak is tO. Which one of

Q. The velocity field in a flow system is given by 𝑣 = 2𝐢 + (𝑥 + 𝑦)𝐣 + (𝑥𝑦𝑧)𝐤. The acceleration of the fluid at (1, 1, 2) is (A) 2𝐢 + 10𝐤 (B) 4𝐢 + 12𝐤 (C) 𝐣 + 𝐤 (D) 4𝐣 + 10𝐤 Ans: 4𝐣 + 10𝐤 Solution:

Q. Structural failures considered in the mechanistic method of bituminous pavement design are (A) Fatigue and Rutting (B) Fatigue and Shear (C) Rutting and Shear (D) Shear and Slippage Ans: Fatigue and Rutting Solution: The correct answer is: In the mechanistic method of bituminous pavement design, the structural failures that are considered are primarily fatigue

Q. Which one of the following options contains ONLY primary air pollutants? (A) Hydrocarbons and nitrogen oxides (B) Hydrocarbons and ozone (C) Ozone and peroxyacetyl nitrate (D) Nitrogen oxides and peroxyacetyl nitrate Ans: Hydrocarbons and nitrogen oxides

Q. If the fineness modulus of a sample of fine aggregates is 4.3, the mean size of the particles in the sample is between (A) 150 mm and 300 mm (B) 300 mm and 600 mm (C) 1.18 mm and 2.36 mm (D) 2.36 mm and 4.75 mm Ans: 1.18 mm and 2.36 mm

Q. A steel column is restrained against both translation and rotation at one end and is restrained only against rotation but free to translate at the other end. Theoretical and design (IS:800- 2007) values, respectively, of effective length factor of the column are (A) 1.0 and 1.0 (B) 1.2 and 1.0 (C) 1.2 and 1.2

Q. A closed thin-walled tube has thickness, 𝑡, mean enclosed area within the boundary of the centerline of tube’s thickness, 𝐴𝑚, and shear stress, 𝜏. Torsional moment of resistance, T, of the section would be (A) 0.5𝜏𝐴𝑚𝑡 (B) 𝜏𝐴𝑚𝑡 (C) 2𝜏𝐴𝑚𝑡 (D) 4𝜏𝐴𝑚𝑡 Ans: τt=T/2Am⇒T=2Amτt

Q. What is curl of the vector field 2𝑥2𝑦𝐢 + 5𝑧2𝐣 − 4𝑦𝑧𝐤 ? A. 6𝑧𝐢 + 4𝑥𝐣 − 2𝑥2𝐤 B. 6𝑧𝐢 − 8𝑥𝑦𝐣 + 2𝑥2𝑦𝐤 C. −14𝑧𝐢 + 6𝑦𝐣 + 2𝑥2𝐤 D. −14𝑧𝐢 − 2𝑥2𝐤 Ans: −14𝑧𝐢 − 2𝑥2𝐤 Solution:

Q. Euclidean norm (length) of the vector [4       −2       −6]𝑇 is A. √12 B. √24 C. √48 D. √56 Ans: