Question with Answer ESE Civil Engineering

1.  At a hydraulic jump, the flow depths are 0.4 m and 5 m at the upstream and downstream, respectively. The channel is wide rectangular. The discharge per unit width is nearly
(a) 5.8 m2/s                  
(b) 6.4 m2/s
(c) 7.3 m2/s                  
(d) 8.3 m2/s
Ans. (c)
2. Overspeed and delay studies on a preselected section of a Highway are conducted by
(a) Fast moving car method
(b) Enoscope
(c) Radar
(d) Traffic contours
 Ans. (a)
3. The surface tension of water at 20°C is 75 × 10–3 N/m. The difference in water surface within and outside an open-ended capillary tube of 1mm internal bore, inserted at the water surface, would nearly, be
(a) 7 mm                      
(b) 11 mm
(c) 15 mm                    
(d) 19 mm
Ans. (c)
4. Survey of India was publishing toposheets using a scale of
(a) 1 :  1000                  
(b) 1 : 5000
(c) 1 :  10000                
(d) 1 : 50000
Ans. (d)
5. The maximum speed of a train on B.G. track having a curvature of 3° and cant of 10 cm with allowable cant deficiency of 76 mm, for conditions obtaining in India, is
(a) 87.6 km/h                
(b) 99.6 km/h
(c) 76.6 km/h                
(d) 65.6 km/h
Ans. (a)
6. The gradient for a B.G railway line such that the grade resistance together with curve resistance due a 4° curve which will be equivalent to a simple ruling gradient of 1 in 150 is
(a) 1 :  180                   
(b) 1 : 200
(c) 1 : 300                    
(d) 1 : 400
Ans. (b)
7. A pelton wheel works under a head of 400m. Friction loss through the pipe flow is limited to 10%. The coefficient of velocity for the jet is 0.98. What is the velocity of the jet?
Take g = 10 m/s2.
(a) 83 m/s                    
(b) 71 m/s
(c) 65 m/s                    
(d) 56 m/s
Ans. (a)
8. The value of porosity of a soil sample in which the total volume of soil grains is equal to twice the total volume of voids would be
(a) 30%                        
(b) 40%
(c) 50%                        
(d) 60%
Ans. (a)
9. A solid cylinder of length H, diameter D and of relative density S floats in neutral equilibrium in water with its axis vertical. What is the ratio of H to D if S = 0.6?
(a) 0.86                        
(b) 0.72
(c) 0.52                        
(d) 0.46
Ans. (b)
10. 43. An open rectangular tank of dimensions 4m×3m×2m contains water to a height of 1.6m. It is then accelerated along the longer side. What is the maximum acceleration possible without spilling the water? If this acceleration is then increased by 10%, what amount of water will be spilt off?
(a) 1.472 m/s2 and 0.48 m3
(b) 1.962 m/s2 and 0.48 m3
(c) 1.472 m/s2 and 0.52 m3
(d) 1.962 m/s2 and 0.52 m3
Ans. (b)
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