gate questions

Q. A catchment may be idealised as a rectangle. There are three rain gauges located inside the catchment at arbitrary locations. The average precipitation over the catchment is estimated by two methods: (i) Arithmetic mean (PA), and (ii) Thiessen polygon (PT). Which one of the following statements is correct? (A) PA is always smaller than […]

Q. If the path of an irrigation canal is below the bed level of a natural stream, the type of cross- drainage structure provided is (A) Aqueduct (B) Level crossing (C) Sluice gate (D) Super passage Ans: Super passage Solution: If the path of an irrigation canal is below the bed level of a natural

Q. In a rectangular channel, the ratio of the velocity head to the flow depth for critical flow condition, is A. 2/3 B. 2 C. 1/2 D. 3/2 Ans: 1/2

Q. An isolated concrete pavement slab of length L is resting on a frictionless base. The temperature of the top and bottom fibre of the slab are Tt and Tb, respectively. Given: the coefficient of thermal expansion = α and the elastic modulus = E. Assuming 𝑇𝑡 > 𝑇𝑏 and the unit weight of concrete

Q. The coefficient of average rolling friction of a road is fr and its grade is +G%. If the grade of this road is doubled, what will be the percentage change in the braking distance (for the design vehicle to come to a stop) measured along the horizontal (assume all other parameters are kept unchanged)?

Q. In the reinforced beam section shown in the figure (not drawn to scale), the nominal cover provided at the bottom of the beam as per IS 456-2000, is (A) 30 mm (B) 36 mm (C) 42 mm (D) 50 mm Ans: 30 mm Solution: ∴ Nominal cover =(50−16/2−12)mm=30 mm

Q. Assuming that there is no possibility of shear buckling in the web, the maximum reduction permitted by IS 800-2007 in the (low-shear) design bending strength of a semi-compact steel section due to high shear is (A) zero (B) 25% (C) 50% (D) governed by the area of the flange Ans: zero

Q. Consider the pin-jointed plane truss shown in the figure (not drawn to scale). Let RP, RQ, and RR denote the vertical reactions (upward positive) applied by the supports at P, Q, and R, respectively, on the truss. The correct combination of (RP, RQ, RR) is represented by (A) (30, –30, 30) kN (B) (20,

Q. An element is subjected to biaxial normal tensile strains of 0.0030 and 0.0020. The normal strain in the plane of maximum shear strain is (A) Zero (B) 0.0010 (C) 0.0025 (D) 0.0050 Ans: 0.0025 Solution:0.0025

Q. A plane truss is shown in the figure (not drawn to scale). Which one of the options contains ONLY zero force members in the truss? (A) FG, FI, HI, RS                                        (B) FG, FH, HI, RS (C) FI, HI, PR, RS                                         (D) FI, FG, RS, PR Ans: FI, FG, RS, PR