Q. For a given loading on a rectangular plain concrete beam with an overall depth of 500 mm, the compressive strain and tensile strain developed at the extreme fibers are of the same magnitude of 2.5×10-4. The curvature in the beam cross-section (in m-1, round off to 3 decimal places), is _ Solution: Given,ϵ=ϵt=ϵc=2.5×10−4y = […]
Q. Which one of the following is a secondary pollutant? (A) Ozone (B) Carbon Monoxide (C) Hydrocarbon (D) Volatile Organic Carbon (VOC) Solution: Ozone Solution: Secondary pollutants are type of pollutant that is formed in the atmosphere. These pollutants are not emitted directly from a source, such as vehicles or power plants. When primary pollutants
Which one of the following is a secondary pollutant? Read More »
Q. A retaining wall of height H with smooth vertical backface supports a backfill inclined at an angle b with the horizontal. The backfill consists of cohesionless soil having angle of internal friction f. If the active lateral thrust acting on the wall is Pa, which one of the following statements is TRUE? (A) Pa
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
