Questions with Answer ESE Civil Engineering
1. A water supply distribution system for an averagely-populated township is to be designed for
(a) Maximum daily demand
(b) Maximum hourly demand and fire demand
(c) Average demand
(d) Maximum daily demand and fire demand or maximum hourly demand, whichever is higher
Ans. (d)
2. A combined sewerage system is more appropriate for developed areas where
(a) Rainfall occurs for a very few days in a year
(b) Rainfall occurs almost uniformly throughout the year
(c) Air temperatures are nearly uniform throughout the year
(d) Air temperatures through the year include extremes during certain runs of days
Ans. (b)
3. 100 m3 of sludge holds a moisture content of 95%. If its moisture content chagnes to 90%, the volume of this sludge will then be
(a) 40.5m3
(b) 50m3
(c) 75m3
(d) 94.7m3
Ans. (b)
4. The design overflow rate of a sedimentation tank is chosen considering
(a) Flow rate through the tank
(b) Diameter of the particle intended to be removed
(c) Volume of the sedimentation tank
(d) Detention time in the tank
Ans. (b)
5. A drain carrying 5m3/s of wastewater with its BOD of 100mg/l joins a stream carrying 50 m3/ s flow with its BOD of 5mg/l. What will be the value of the BOD of the combined flow after complete mixing?
(a) 3.6 mg/l
(b) 13.6 mg/l
(c) 33.6 mg/l
(d) 53.6 mg/l
Ans. (b)
6. The side of a square land was measured as 150 m and is in error by 0.05 m. What is the corresponding error in the computed area of the land.
(a) 5 m2
(b) 10 m2
(c) 15 m2
(d) 20 m2
Ans. (c)
7. For a hydraulically efficient rectangular channel of bed width 5m, the hydraulic radius is
(a) 0.5m
(b) 1.25m
(c) 2.75m
(d) 4.25m
Ans. (b)
8. A soil sample has shrinkage limit of 6%, and the specific gravity of the soil grains is 2.6. The porosity of soil at shrinkage limit is
(a) 7.5%
(b) 9.5%
(c) 13.5%
(d) 16.5%
Ans. (c)
9. The consistency and flow resistance of a sample of bitumen can be determined through which of the following tests?
(a) Viscosity test
(b) Penetration test
(c) Ductility test
(d) Softening point test
Ans. (a)
10. A pipe of 324 mm diameter, having friction coefficient as 0.04, connects two reservoirs with 15 m difference in their water levels through a 1500 m long pipe. What will be the discharge through the pipe?
(a) 104 lps
(b) 134 lps
(c) 165 lps
(d) 196 lps
Ans. (a)