Water in Soil

The stress of soil (kN/m3) is influence by the _______and __________.

• force and depth

• density and area

• unit weight and area

• unit weight and depth

The capillary action takes place above ground water table up to 1.3 m height. Assume the unit weight of water is 10 kPa. Calculate the pore water pressure at the surface of ground water table.

• -13 kPa

• -10 kPa

• 0 kPa

• 13 kPa

The followings statement is associated to the possible increase in effective stress at certain depth except

• ground water table decrease

• ground water table increase

• the existence of capillary action

• the changes from loose to a dense state of soil

1. The soil with a unit weight of 19 kN/m³ with a thickness of 3m is carried a load from an embankment of 75 kN/m². Determine the total stress at the ground surface.

• 132 kN/m3

• 132 kN/m2

• 75 kN/m2

• 57 kN/m2

1. The soil with a saturated unit weight of 19 kN/m³ with a thickness of 3m is carried a load from an embankment of 75 kN/m². If the ground water table is at the ground surface, determine the effective stress at the bottom layer of soil. Assume unit weight of water is 10 kN/m³

• 102 kN/m3

• 132 kN/2

• 75 kN/m2

• 102 kN/m2

Rate of water flow in soil is indicate by

• Cohesion

• Permeability

• Moisture content

• Conductivity

In which state of energy will water move?

• high energy to low energy

• low energy to high energy

• high energy to high energy

• low energy to low energy

Soil that is saturated is said to have a water potential(pore water pressure) of...

• Zero

• Negative

• Positive

Sinkholes is happen due to

• natural causes

• human interaction in underground

• pipe leaking

• all

Permeability is address as follows ACCEPT

• a coefficient to rate the accelaration of water flowing

• in clay, the k value is very small

• can be address as k

• increases k value for lower porosity, n