Geotechnical Engineering

Frost Action

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Silt soils are more susceptible to frost action than __________
Sand soil and Clayey soil
Gravel soil
None of the mentioned
All of the mentioned
Explanation:
Silt soils have more plasticity index than sand and clays and hence the softening effect due to excess water will be more severe in silts.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
A well graded soil is said to be frost susceptible if more than _________
10 % particle are smaller than 0.002 mm
3 % particle are smaller than 0.002 mm
3 % particle are smaller than 0.005 mm
10 % particle are smaller than 0.005 mm
Explanation:
A well graded soil is reckoned to be frost susceptible if 3 % particle are smaller than 0.002 mm and for poor graded soil 10 % particle are smaller than 0.002 mm.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
If the void ratio is 40% in saturated soil, then the expansion of the soil will be __________
5 %
2.3 %
3.6 %
4 %
Explanation:
There is an increase of about 9% in the volume, when water is converted in to ice. Therefore
Question 4
Marks : +2 | -2
Pass Ratio : 100%
What is the maximum capillary tension for a tube of 0.05 mm diameter at 4°c?
6.05 KN/m3
0.617 KN/m3
5.45 KN/m3
3.00 KN/m3
Explanation:
Maximum capillary height at 4°c is
Question 5
Marks : +2 | -2
Pass Ratio : 100%
The temperature at which the soil freezes in the pores of the soil depend on __________
Pore size
Frost action
Saturation
Capillary tension
Explanation:
As the water freezes in larger pores, and remain unfrozen in the smaller pore the temperature falls downs.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Soil should possess___________for the formation of ice lens.
Low moisture content
High porosity
High capillarity
All of the mentioned
Explanation:
For the formation of ice lens and frost heave, soil should possess high capillarity so that the soil possesses a high capacity to pull water.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
What are the types of soils, that are prone to frost action?
Sand and Silt
Clay
None of the mentioned
All of the mentioned
Explanation:
Only silts and fine sands are prone to frost action because these soils have large capillary rise due to relatively fine particles.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Frost heave is defined as ___________
Rise of ground water surface
Freezing of water in soil
Increase in volume due to freezing
None of the mentioned
Explanation:
Rise of ground water surface in a soil mass due to frost action is termed as frost heave.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
The ground surface up to which water freeze is called ___________
Frost heave
Frost boil
Frost line
Ice lenses
Explanation:
Frost line is the depth or boundary below the ground surface up to which water may freeze.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is an effect of frost boils?
Formation of pot holes
Increased frost depth
Formation of capillary saturation
All of the mentioned
Explanation:
Due to frost boils, there is a formation of pot holes by extrusion of soft soil and water under the dynamic action of wheel loads.