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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

(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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