SSC-JUNIOR ENGINEER (Civil & Structural) Online Exam 2017 (Part-III)

Total Questions: 50

31. 10 m thick confined aquifer gives the steady state discharge of 0.03 m³/s through the well of 50 cm radius. Due to pumping, the height of water in the well is dropped from 15 m to 10 m and the radius of influence is obtained as 500 m. What is the coefficient of permeability (mm/s)?

Correct Answer: A 0.65
Solution:No explanation given in the book

32. Which of the following represents the range of plasticity index for silt?

Correct Answer: A. 10 to 15
Solution:No explanation given in the book

33. The grain size (mm) of medium grained sand lies between ______.

Correct Answer: B. 2.0 to 0.425
Solution:No explanation given in the book

34. During the flow over length of 30 m, the head loss of 5 m is occurred during the seepage. What is the value of hydraulic gradient?

Correct Answer: C. 0.167
Solution:No explanation given in the book

35. Which of the following is measured with the help of barometer?

Correct Answer: C. Pressure
Solution:No explanation given in the book

36. If the gauge pressure and atmospheric pressure at a point are observed as 70 mm of mercury and 750 mm of mercury respectively. What is the value of the absolute pressure (mm of mercury) at that point?

Correct Answer: D. 820
Solution:No explanation given in the book

37. The rise of mercury in barometer is indicated as 80 mm. What is the atmospheric pressure (kN/m²) at that point?

Correct Answer: C. 10696
Solution:No explanation given in the book

38. Water is transported on a level road in road the cylindrical container of diameter 0.5 m and height 0.8 m. The maximum acceleration of vehicle is 5 m/s². What is the initial allowable height of water (cm) in the tank, if there is no spill?

Correct Answer: B. 67.3
Solution:No explanation given in the book

39. For a flow, the velocity field and variation in density is given as,

Correct Answer: A. -11
Solution:No explanation given in the book

40. A circular pipe of diametre 0.5 m carries the discharge of 50 litre/s. The head loss due to friction in pipe is 0.15 m and friction factor for the pipe is given as 0.01. What is the length (m) of pipe?

Correct Answer: B. 85.71
Solution:No explanation given in the book