All India SSC JE 2017 Civil Engineering - Quiz 19

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Question 1

When small sphere falls freely in Stokes range through a water column, which of the following statements are correct?
1) Viscosity, surface tension and gravitational forces act on the sphere.
2) There is no turbulence possible in the wake of the falling sphere.
3) Drag coefficient, C_d = R/24, where R is Reynolds number.
4) Proximity of the boundary moderates the drag and lift coefficients.

• A1 and 2
• B2 and 3
• C3 and 4
• D2 and 4

Question 2

The virgin compression curve for a soil is shown in figure below. What is the compression index of the soil?

• A0.3
• B0.5
• C1.5
• D15

Question 3

A channel designed by Lacey’s theory has a velocity of 0.88 m/sec. The silt factor is 1.1. Then hydraulic mean depth will be

• A1.95 m
• B1.76 m
• C1.63 m
• D1.50 m

Question 4

Two-dimensional stress system on a block made of a material with Poisson’s ratio of 0.3 is shown in the figure

The limiting magnitude of the stress so as to result in no change in length AB of the block is

• A
• B
• C
• D

Question 5

A mean annual runoff of 2 m³/s from a catchment of area 10 km² represents as effective rainfall of nearly:

• A530 cm
• B590 cm
• C630 cm
• D658 cm

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