Lecture Capture Answers Flashcards by Joe Youldon

Newly deposited soil only exhibits one of these strengths:

Cohesive,
Frictional,
Tensile.

Newly deposited soil only has Frictional Strength

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The third grade of weathering of rocks is described as:

Soil,
Completely weathered,
Moderately weathered.

The third grade of weathering of rocks is described as moderately weathered

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Which of the following should be described under the mass characteristics of soils when following BS5930:2015

Geological Formation,
Bedding,
Colour.

Bedding should be described under the mass characteristics when following BS5930:2015

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The engineering properties of the ground will usually increase with depth due to:

Confinement,
Age,
Water Content.

The engineering properties of the ground will usually increase with depth due to confinement.

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The load applied to the ground over the area of a foundation is termed the:

Bearing Pressure,
Behaviour Pressure,
Bowing Pressure.

The load applied to the ground over the area of a foundation is termed the Bearing Pressure

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A engineering geological ground investigation is always:

Unchanging,
A perfect representation of the ground,
Constantly evolving.

A ground investigation model is constantly evolving

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In the initial stage of the ground investigation, there should always be:

Intrusive investigation,
Desk Study,
Contamination Testing.

In the initial stage of the ground investigation there should always be desk study.

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Geophysical surveys rely on:

Contrasts in the ground properties,
Historical Maps,
Airborne Radiation.

Geophysical surveys rely on contrasts in the ground properties.

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Which of these is not a type of drill rig?

Percussion,
Rotary,
Sledge.

Sledge is not a type of drill rig.

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The limitations of a trial pit do not include:

Ability to take samples,
Depth,
Spatial Coverage.

The limitations of a trial pit do not include the ability to take samples

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Which geological property does not affect the strength of rocks?

Grain size,
Colour,
Degree of inter-granular bonding

Colour does not affect the strength of rocks

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Which is not a mechanical property of rocks?

Elasticity,
Mineralogy,
Strength

Mineralogy is not a mechanical property of a rock

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Rocks that show different strengths based on the loading orientation are said to be:

Weak,
Heterogeneous,
Anisotropic.

Rocks that show different strengths based on the loading orientation are said to be anisotropic.

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Young’s Modulus is a measure of?

Elasticity,
Compressibility,
Strength

Young’s Modulus is a measure of Elasticity

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A very weak rock has a strength of below:

500kPa,
200MPa,
3MPa.

A very weak rock has a strength below 3Mpa

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Which of the following describes a rock mass?

The mechanical properties are governed by the material and its discontinuities,
Always behaves in plastic manner,
Is always weathered.

A rock mass’s mechanical properties are governed by the material and its discontinuities.

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Which of these is not a discontinuity?
Gneissic banding,
A bedding plane fracture,
A joint,

Gneissic banding is not a discontinuity

In the Barton-Bandis model, what does JRC refer to?

Joint Roughness Contact,
Joint Roughness Coefficient,
Joint Rugosity Condition.

In the Bartion-Bandis model, JRC refers to Joint Roughness Coefficient.

Which of the following is not true of rock joints?

They always show strain hardening,
Shearing can be accommodated through overriding of asperities,
φb is strain independent.

Rock joints do not always show strain hardening.

Which failure criterion/ constitutive model best describes rock masses?

Mohr-Coulomb,
Barton-Bandis,
Hoek-Brown.

Hoek-Brown best describes rock masses

A continuum represents a mass that:

is locked in place,
acts like a single body,
is dominated by the properties of a single discontinuity

A continuum represent a mass that acts like a single body

What is not one of the 3 most relevant material properties to rock slope stability?

Unit mass,
The angle of friction,
the permeability

The permeability is not one of the 3 most relevant material properties to rock slope stability.

Which angle of discontinuity would make a vertical slope the most unstable?

55 Degrees,
65 Degrees,
45 Degrees.

A 55 degree angle of discontinuity would make a vertical slope the most unstable.

For a block to slide on a inclined slope, the angle of slope needs to:

be less than the angle of friction at the contact,
be equal to the angle of friction at the contact,
be greater than the angle of friction at the contact.

For a block to slide on an inclined slope, the angle of slope needs to be greater than the angle of friction at the contact.

Wedge sliding requires: A single discontinuity, 2 intersecting discontinuities, 3 intersection continuities.

Wedge sliding requires 2 intersecting discontinuities

The stability of a slope can be expressed by: A safety scale, A factor of safety, A factor of uniformity.

The stability of a slope can be expressed by a factor of safety.

When the forces promoting failure of a slope are matched equally by the opposite forces opposing failure, this is known as: Limiting Stress, Limiting Equilibrium, Limiting Displacement.

When the forces promoting failure of a slope are matched equally by the opposite forces opposing failure, this is known as limiting equilibrium.

To assess the stability of a slope using limit equilibrium methods, you must assume: The slope can only fail along existing discontinuities, Failure surfaces develop through intact rock, The slope fails in tension.

To assess the stability of a slope using limit equilibrium methods, you must assume the slope can only fail along discontinuities.

If a rock slope has a safety factor of >1, this means that the slope is: Stable, Unstable, in a condition of limiting equilibrium

If a rock slope has a safety factor of >1, this means that the slope is stable

The effect of water pressure in a tension crack has to be resolved into an uplift and thrust force unless: the tension crack is perpendicular to the potential failure surface, the tension crack is oblique to the potential failure surface, the tension crack is parallel to the potential failure surface.

The effect of water pressure in a tension crack has to be resolved into an uplift and thrust force unless the tension crack is perpendicular to the potential failure surface.

What is not true of landslides? Movement must be outward and downward, Movement can be falling, bounding, sliding or flow, They only happen on the land.

Landslides do not only happen on the land.

The very top of a landslide is called the: head, flank, crown.

The very top of a landslide is called the crown.

Which of these 3 flows is not caused by involvement of water? Sand blow, Solifluction, Debris Flows

Sand blow is not caused by the involvement of water.

An extremely rapid landslide has a velocity of: >5m/sec >50m/sec >500mm/sec

An extremely rapid landslide has a velocity of >5m/sec.

The most common cause of landslides in the UK is: Poor engineering, Rainfall, Earthquakes

The most common cause of landslides in the UK is rainfall.

Which of these statements is false? Faults are caused by large earthquakes, Earthquakes can be shallow or deep focused, Earthquakes are caused by the elastic rebound of the crust.

Faults are not caused by large earthquakes.

Which is not a measure of earthquake magnitude? The Fault Displacement Magnitude Scale, The Moment Magnitude Scale The Richter Local Magnitude Scale

The Fault Displacement Magnitude Scale is not a measure of earthquake magnitude.

What is the most commonly used measure of the ground shaking? Magnitude, Peak Ground Acceleration, Spectral Acceleration.

Peak Ground Acceleration is the most commonly used measure of the ground shaking.

Liquefaction occurs most commonly in: Silty Sands, Clays, Loose Gravel.

Liquefaction occurs most commonly in Silty Sands.

The return period of earthquakes are shorter on faults with: High slip rates, Low slip rates, Variable slip rates.

The return period of earthquakes are shorter on faults with high slip rates