List of top Civil Engineering Questions

Ringelmann’s scale is used to ........
Electrostatic precipitator is a device to control .........
What is the total percentage of nitrogen gas present in the air?
The permissible time limit of 120 dB noise is .........
Which one of the following pollutants or pairs of pollutants is formed due to photochemical reactions?
Pollutant standards index (PSI) value between 101–199 denotes the air quality as ........
The minimum dissolved oxygen required in water to save the aquatic life is ............
High COD to BOD ratio of an organic pollutant represents ............
In transition of sewers from smaller diameter sewers to larger diameter sewers, the continuity of sewers is maintained at the ...........
Acceptable lower limit of bacteria removal through activated sludge process is ...........
The biochemical treatment of sewage effluents is essentially a process of ............
A circular primary clarifier processes an average flow of 5005 m\(^3\)/day of municipal wastewater. The outflow rate is 35 m\(^3\)/m\(^2\)·d. The diameter of clarifier shall be ........
In an irrigated plot the net irrigation requirement of crop is found to be 14.9 cm, the application efficiency is 80% and water conveyance efficiency is 70%. What is the gross irrigation requirement (GIR)?
Fresh sludge has moisture content of 99%, after thickening its moisture content is reduced to 96%. The reduction in volume of sludge is ........
If sensitivity of an irrigation module is 0.5, then what percent variation in outlet discharge will be caused by 50 percent variation in canal water depth?
A city supply of 15000 cubic meters of water per day is treated with a chlorine dosage of 0.5 ppm. For the purpose, the requirement of 25% bleaching powder per day would be .......
Which of the following is a method for estimating evaporation from a water surface?
As compared to fresh river water, sea water contains .........
What is the discharge capacity required at the outlet to irrigate 2200 hectares of sugarcane having a kor depth of 17 cm and kor period of 30 days?
For medium silt whose average grain size is 0.16 mm, Lacey’s silt factor is likely to be
The flow of a liquid at constant rate in a conically tapered pipe is classified as ...........
A flat plate of 0.15 m\(^2\) is pulled at 20 cm/s relative to another plate, fixed at a distance of 0.02 cm from it with a fluid having \( \mu = 0.0014 \, \text{Ns/m}^2 \) separating them. The power required to maintain the motion is ...........
A drainage basin has an area of 210 km$^2$. The average depth of rainfall received by it during a monsoon period is computed as 65 cm, while the runoff measured at its outlet during the same period is estimated to be $5.68 \times 10^7$ m$^3$. What percentage of rainfall has become runoff?
What should be the diameter of an open well to give a safe yield of 4.8 l/s? Assume working head as 3.75 m and sub soil consists of fine sand of \( C = 0.5\ \text{h}^{-1} \).
A sphere of 150 mm diameter is held in equilibrium by a vertical air stream of velocity 15 m/s. If the density of air is \( 1.225 \, \text{kg/m}^3 \) and the coefficient of drag is 0.43, the weight of the sphere is ...........