GH-RISKS TRIVIA 5

Which of the following methods is not used for the treatment of sensitive marine clays?

• Jet grouting

• Soil replacement

• Deep mixing

• Paste backfilling

What is the main cause of alligator cracking on pavement?

• Insufficient structural capacity and presence of expansive soil

• Rainfall on a dry expansive soil

• Presense of expansive soil in the pavement surfacing

• Excessive axial load from traffic

What is the primary cause of rutting on road pavement?

• Fatigue and exceseive loading

• Presence of expansive soil

• Presence of sensitive marine clay

• Use of light asphalt

Clay sensitivity is calculated as

• (undrained shear strength)/(remoulded undrained shear strength)

• (drained shear strength)/(remoulded drained shear strength)

• (undrained shear strength)/(drained shear strength)

• (undrained shear stress)/(remoulded undrained shear stress)

Which of the following is not a landslide type?

• Rotational slide

• erratic slide

• Translational slide

• Lateral spread

What are the main gases generated from landfills?

• Methane and nitrates

• Carbondioxide and nitrates

• Carbondioxide and methane

• Methane, carbondioxide, and nitrates

All the following are used as alternative liner materials except

• Red mud

• Marine clay

• Marble dust + bentonite

• Silica powder

The best presentation at the GH-RISKS conference wins the Gordon McRostie award

• True

• False

Sensitive marine clays can cause sinkholes

• True

• False

Which oif the following specific gravity values can be of a bentonite clay?

• 2.5

• 2.7

• 3.2

• 1.8