23-24 S3 2nd term Geog. Test Revision

The figure shows a measure to strengthen a man-made slope. Which of the following descriptions about the measure is/are correct?

1 It is a soil nail.

2 It anchors the soil to the slope.

3 It increases the driving force of the slope.

• 1 only

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

Which of the following statements about landslides are correct?

1      Landslides occur when the driving force is greater than the resisting force.

2      Friction between soil grains resists movement down the slope.

3      The heavier the slope materials, the greater the resisting force.

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

• 1, 2 and 3

Which of the following descriptions about the preventive measures on the slope shown are correct?

1 Soil nails are installed on the slope.

2 The slope is covered with shotcrete.

3 The measures prevent rainwater from increasing the driving force of the slope.

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

• 1, 2 and 3

Which of the following matches about landslide preventive measures and their effects on slope stability is/are correct?

• 2 only

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

Which of the following explain(s) why heavy rainfall causes landslides?

1 Cohesion of soil grains increases

2 Weight of the slope increases

3 Friction between soil grains decreases

• 2 only

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

The heavier the slope materials, the greater the _____.

• slope gradient

• friction

• resisting force

• driving force

Water increases the friction of the slope, it also adds weight to the slope materials.

• True

• False

Many areas in Hong Kong and Macau are made up of _____ . It is easily weathered in hot and wet climate, thus results in landslides.

• vegetations

• marble

• granite

• rocks

Vegetation on slopes increases resisting force as plant roots hold the soil together.

• True

• False

_____ includes the cohesion of slope materials and the force of friction which prevent the slope materials from falling down.

• Drivinig force

• Resisting force

• Stability

• Gravity