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zRock Mechanics > Quiz 1 > Flashcards

Quiz 1 Flashcards

1
Q
  1. It is the theoretical and applied science of the mechanical behavior of rock masses.
    a) Rock mechanics
    b) Geomechanics
    c) Soil mechanics
    d) Structural geology
A

a

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2
Q
  1. It concerned with the mechanical responses of all geological materials including soil.
    a) Mineral mechanics
    b) Rock mechanics
    c) Geomechanics
    d) Soil mechanics
A

c

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3
Q
  1. The concept that used to describe the intensity of internal forces set up in a body under the influence of a set of applied surface force.
    a) Force
    b) Strain
    c) Stress
    d) Movement
A

c

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4
Q
  1. It defines the shear stress component vanish, that is possible to select a particular orientation for a plain such that it is subject to normal stress.
    a) Stress transformation
    b) Stress invariance
    c) Principal stress
    d) Principal plane
A

d

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5
Q
  1. The way to describe qualitatively in which stress and strain are related in a material under load.
    a) Constitutive behavior
    b) Elasticity
    c) Poisson’s ratio
    d) Stress
A

a

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6
Q
  1. It ranks second isotropic elasticity in the degree of expression of elastic symmetry in the material behavior.
    a) Transverse isotropic elasticity
    b) Modulus of elasticity
    c) Modulus of rigidity
    d) Poisson’s ratio
A

b

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7
Q
  1. The term to described the intact rock between discontinuities.
    a) Rock mass
    b) Aperture
    c) Rock material
    d) Filling material
A

c

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8
Q
  1. It is the total in situ medium containing bedding planes, faults, joints and other structural feature.
    a) Rock material
    b) Lithology
    c) Rock mass
    d) Structure
A

c

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9
Q
  1. It is the nature and distribution of structural features within the rock mass.
    a) Stress
    b) Geologic feature
    c) Rock material
    d) Rock structure
A

d

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10
Q

The fractures on which identifiable shear displacement has taken place
a) Spacing
b) Faults
c) Persistence
d) Discontinuity

A

b

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11
Q
  1. The perpendicular distance between adjacent discontinuities.
    a) Dip
    b) Dip angle
    c) Strike
    d) Spacing
A

d

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12
Q
  1. Term to described the aerial extent or size of a discontinuity with a plane.
    a) Aperture
    b) Aerial photo
    c) Persistence
    d) Stereo net
A

c

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13
Q
  1. The distance range of discontinuities spacing which considered as extremely close spacing.
    a) 20-60mm
    b) 60-200mm
    c) 50-200mm
    d) 60-200mm
A

b/d

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14
Q
  1. At every of an earth mass there also is a horizontal pressure which is a fraction of the vertical pressure and this is called the coefficient of:
    a) Friction
    b) Permeability
    c) Compression
    d) Earth pressure
A

d

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15
Q
  1. When driving shear stresses exactly equal the shear resistance, the mass is said to be in a:
    a) State of limiting equilibrium
    b) State of isostasy
    c) State of normalcy
    d) Balanced condition
A

a

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16
Q
  1. A tri-axial test measures the:
    a) Tensile strength
    b) Shear strength
    c) Compressive and shear strength
    d) The rupture strength
A

c

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16
Q
  1. Because of non-uniform loading and the heterogeneous character of the supporting strata, various portions of the structure settle by different amounts called:
    a) Subsidence
    b) Upheaval
    c) Differential settlement
    d) Uplift
A

c

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17
Q
  1. Tangential stresses within an earth mass exist because of:
    a) Volcanic disturbance
    b) Tectonics
    c) Earthquakes
    d) Surface loading of the mass
A

d

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18
Q
  1. In rock mechanics, as well as in soil mechanics, a mass that is bounded at the top only is:
    a) An infinite mass
    b) A finite mass
    c) Semi-infinite mass
    d) A definite mass
A

c

19
Q
  1. When the vertical pressure is greater than horizontal, an underground opening will show the greatest deformation at the:
    a) Sides
    b) Floor
    c) Roof
    d) Working face
A

a

20
Q
  1. The envelope shows:
    a) The compressive strength of a material when confined
    b) The modulus of elasticity
    c) A stress analysis
    d) A 3-D analysis
A

a

21
Q
  1. A tunnel is most suitable when driven:
    a) A perpendicular to the direction of the principal stress
    b) Along or parallel to the principal stress
    c) 45 degree to the direction of the principal stress
    d) Along or parallel to the intermediate stress
A

b

22
Q
  1. Virgin or pre-mining stress:
    a) Means the stress in the rock mass before excavation
    b) Is the redistributed stress around the opening
    c) Is the induced stress after the creation of the opening
    d) Is the stress due to the overburden
A

a

23
Q
  1. Static properties of rock:
    a. Are those tested over long period of time
    b. Are those tested in matters of minutes
    c. Include creep
    d. Are those that resist dynamic stresses such as those that result from earthquakes
A

b

24
Q
  1. The main difference between rock mechanics and classical mechanics is:
    a. That in rock mechanics, the post-failure characteristic of rock is more significant and useful in mining than the pre-failure ones
    b. The strength of rock compared to steel
    c. That classical mechanics does not take into account seismic forces
    d. That rock mechanics is used only for mining
A

a

25
Q
  1. Rock ,when confined:
    a. Breaks
    b. Dilates
    c. Shrinks
    d. Become stronger
A

d

26
Q
  1. One of the elastic properties of rock is:
    a. Density
    b. Poisson’s ratio
    c. Weight
    d. Porosity
A

b

27
Q
  1. The angle of internal friction is rock’s:
    a. Dynamic property
    b. Strength property
    c. Hydraulic property
    d. Acoustic property
A

b

28
Q
  1. The ratio of the change in dimension to the original dimension called:
    a. Strain
    b. Stress
    c. Young’s modulus
    d. Poisson’s ratio
A

a

29
Q
  1. Indirect tensile test is also called the:
    a. Brazilian disc test
    b. Ring test
    c. Shear strain
    d. Rigidity modulus
A

a

30
Q
  1. The ratio of the stress to the strain is called:
    a. Poisson’s ratio
    b. Modulus of elasticity
    c. Shear strength
    d. Tensile strength
A

b

31
Q
  1. The traverse strain divided by the longitudinal strain is called the:
    a. Modulus of elasticity
    b. Poisson’s ratio
    c. Shear strain
    d. Rigidity modulus
A

b

32
Q
  1. The ability of a rock to resist compression is called:
    a. Shear strength
    b. Tensile strength
    c. Compressive strength
    d. Rigidity
A

c

33
Q
  1. Mode of failure can only occur in soil slope:
    a. Wedge
    b. Plane
    c. Toppling
    d. Circular
A

d

34
Q
  1. Wedge failure in slopes may be made possible through the intersection of at least _______ discontinuity.
    a. Two
    b. Three
    c. Four
    d. Five
A

a

35
Q
  1. RQD is a measure of the rock’s
    a. Drillability
    b. Integrity
    c. Blastability
    d. Density
A

b

36
Q
  1. The amount of stress disturbance made by an underground opening to the surrounding rock depends on:
    a. The size of the opening
    b. Nature of the enclosing rock
    c. Location of the water table
    d. Presence of tectonic stress
A

a

37
Q
  1. The size of a stable pillar is a function of its strength and its:
    a. Shape
    b. Load
    c. Location
    d. Function
A

b

38
Q
  1. A rock mass classification that quantifies discontinuity by the ratio of lengths of the individual pieces of core recovered in a drill run, having lengths of 10cm or greater and the total length of drill run.
    a. Rock mass rating (RMR)
    b. Percent core recovery (PCR)
    c. Fracture spacing (FS)
    d. Rock quality description (RQD)
A

d

39
Q
  1. Method of representing and analyzing the three dimensions relations between planes and lines on a two dimensional diagram.
    a. Hemispherical projections
    b. Plane projections
    c. Orthographic projection
    d. Isometric projection
A

a

40
Q
  1. The maximum stress that the rock material can sustain under a given set of condition;
    a. Bearing capacity
    b. Hardness
    c. Peak strength
    d. Malleability
A

c

41
Q
  1. The stress which governs the gross mechanical response of porous material.
    a. Normal stress
    b. Thermal stress
    c. Shear stress
    d. Effective stress
A

d

42
Q
  1. The stress reduction effect given by one opening to another opening that is below and parallel to it.
    a. Dome effect
    b. Stress shadow
    c. Shielding effect
    d. Pressure arch
A

c

43
Q
  1. The stress that is deflected to the virgin blocks or block adjacent to the opening. The stress was formerly carried by the block that has been extracted in creating the opening.
    a. In-situ stress
    b. Abutment stress
    c. Virgin stress
    d. Principal stress
A

b

44
Q
  1. The stress existing in rock mass before an opening is excavated.
    a. In-situ stress
    b. Tangential stress
    c. Shear stress
    d. Induced stress
A

a

zRock Mechanics (6 decks)

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