DRRR 30-item Live Quiz

What type of hazard refers to naturally occurring earth phenomena that can cause danger to life and property?

• Meteorological hazard

• Geological hazard

• Hydrological hazard

• Biological hazard

Oversteepening occurs when:

• A slope’s angle becomes greater than it can support

• Water reduces soil cohesion

• A slope gains vegetation

• Wind blows away the topsoil

Overloading happens when:

• The slope becomes dry

• The water content of the soil increases

• The base is reinforced

• The slope is covered with trees

Which human activity can cause overloading of slopes?

• Mining

• Irrigation leakage

• Road construction

• Deforestation

Lack of vegetation increases landslide risk because it:

• Holds too much water

• Strengthens soil particles

• Permits more water to seep and loosen soil

• Prevents soil erosion

The settling or gradual sinking of the Earth’s surface is called:

• Ground subsidence

• Ground fissure

• Soil erosion

• Rock weathering

Ground subsidence caused by the dissolution of limestone is known as:

• Groundwater abstraction

• Underground mining

• Oversteepening

• Carbonate dissolution and collapse

Groundwater abstraction leads to subsidence because:

• Water adds weight to the soil

• Water extraction removes pressure supporting rock layers

• Water increases soil cohesion

• Water saturates the base of slopes

Oil and gas extraction cause ground subsidence by:

• Releasing pressure that supports rock layers

• Adding weight on topsoil

• Blocking underground cracks

• Increasing groundwater levels

Which human activity directly removes underground materials and may cause ground subsidence?

• Farming

• Tree planting

• Underground mining

• Construction