SSC JE Civil Engineering 25th Jan 2018 Shift-1

Instructions

For the following questions answer them individually

Question 141

What is the value of friction factor, if the diameter of pipe is 50 cm and roughness height is 0.25 cm?

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Question 142

What is the head loss in pipe due to friction over the length of 30 km, if the diameter of pipe is 80 cm and velocity of flow is 30 cm/s? Take friction factor 0.032.

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Question 143

The range of Froud number for the weak jump is________.

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Question 144

What is the velocity (m/s) with which elementary wave can travel upstream, if the velocity of flow is 2 m/s and depth of flow in channel is 1 m?

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Question 145

Which one is the best method of reclamation of the alkaline soil?

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Question 146

The intensity of the rainfall for successive 1 hours period of a 6 hours storm are 2, 6, 8, 9, 7 aand 3 cm/hr. The runoff is 4 cm/hr. Calculate the $$ \phi $$ - index (cm/hr).

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Question 147

The intermediate sight distance is equal to ______.

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Question 148

Calculate the equivalent radius of the resisting section of 20 cm thick slab, if the ratio of the radius of wheel load distribution to the thickness of the slab is 0.5.

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Question 149

Which of the following is responsible for the corrosion of concrete sewers?

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Question 150

Which of the following is responsible for the depletion of ozone layer in the upper atmosphere?

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