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RVUNL_CE_Quiz 86

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Question 1

Cohesion is 15 KN/m2, the unit weight of soil is 20 KN/m3, the factor of safety is 1.5 and the stability number is 0.05; the safe maximum height of the slope is:

Question 2

A canal of 4 m deep has side slopes of 1 : 1. The properties of the soil are c = 15 kN/m2, ϕ = 15°, e = 0.76 and G = 2.7. Taylor’s stability number for that sudden drawdown = 0.136. The factor of safety with respect to cohesion in the case of sudden drawdown will be

Question 3

Which of the following factors leads to decrease the slope stability of soil?

(i) Increase in ground water table

(ii) Steady seepage

(iii) Dynamic forces

(iv) Reduction in height of the slope

Question 4

If an infinite slope of clay at a depth of 6 m has cohesion of 3 t/m2 and unit weight of 2.5 t/m3, then the stability number will be

Question 5

Consider the following statements:
Dewatering increases the slope stability of a cohesionless soil mainly because
1). It causes change in pH
2). It reduces pore water pressure
Which of these statements is/are correct?

Question 6

Cohesion is 15 KN/m2, the unit weight of soil is 20 KN/m3, the factor of safety is 1.5 and stability number is 0.05; the safe maximum height of the slope is
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