SSC JE Civil Engineering 29th Jan 2018 Shift-2

10 m thick confines aquifer gives the steady state discharge of 0.03 $$\frac{m^{3}}{s}$$ through the well of 50 cm radius. Due to pumping, the height of the water in the well is dropped frpm 15 m to 10 m and the radius of influence is obtained as 500 m. What is the coefficient of permeability $$(\frac{mm}{s})$$ ?

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

The grain size (mm) of medium grained sand lies between____.

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?

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

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?

The raise of mercury in barrometer is indicated as 80 mm. What is the atmospheric pressure $$(\frac{KN}{m^{2}})$$ at that point ?

Water is transported on a level road in the cylindrical container of diameter 0.5 m and height 0.8 m. The maximum acceleration of vehicle is 5 $$\frac{m}{s^{2}}$$. What is the initial allowable height of water (cm) in the tank, if there is no spill ?

For a flow, the velocity field and variation in density is given as, $$\bar{V}=(10X+3Y+2Z)\hat{i}+(12X+4Y+5Z)\hat{j}+(8X+7Y+\lambda Z)\hat{k}$$ and $$\rho = \rho_0 e^{-3t}$$ respectively. What is the value of $$\lambda$$, if the mass is conserved ?

A circular pipe of diameter 0.5 m carries the discharge of 50 litres/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?