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Rock Mechanics > Quiz 2 > Flashcards

Quiz 2 Flashcards

1
Q
  1. Limestone formations, whether folded or heavily faulted, are what type of rocks?
    A. deposited by man and machine
    B. sedimentary rocks
    C. vein-type deposits mineable by underground
    D. volcanic origin
    E. igneous rocks
A

B

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2
Q
  1. A record of geologic facts in their correct space relations is called:
    A. core log C. geologic map E. pit design map
    B. assay map D. aerial photographs
A

C

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3
Q
  1. It is the maximum slope at which any loose materials comes to rest when poured or dumped in a pile.
    A. angle of repose C. working slope E. angle of draw
    B. gradient slope D. drain angle
A

A

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4
Q
  1. It is the field of study that is concerned in checking the properties and behaviour of rocks when subjected to force field:
    A. strength of materials C. slope stability E. soil mechanics
    B. rock mechanics D. ground control
A

B

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5
Q
  1. It is the science of understanding the properties and mechanical behaviour of rocks and rock formation and the nature of stresses within them and their immediate environment.
    A. strength of materials C. soil mechanics E. rock mechanics
    B. rock surveying D. mapping and interpretation
A

E

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6
Q
  1. In rock mechanics, ore core logging, RQD means :
    A. rock grinding index C. rock bond index e. rock quality designation
    B. rock identification D. rock hardness
A

E

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7
Q
  1. A word commonly used in rock mechanics as collective term for all fractures or features in a rock mass such as joints, faults, shears, etc. that have zero or relatively low tensile strengths is called:
    A. fracture plan C. lineation E.fabric
    B. structure D. discontinuity
A

D

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8
Q
  1. Rock mechanics differs from classical mechanics in:
    A. the strength of rocks compared with steel
    B. in rock mechanics, the post failure characteristics of rocks is more useful and significant in mining than the pre-failure ones
    C. rock mechanics is applied in mining
    D. seismic forces are not considered in classical mechanics
A

B

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9
Q
  1. A record of geologic facts in their correct space relations is called:
    A. geologic map C. pit design E. aerial photograph
    B. core log D. assay map
A

A

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10
Q
  1. One of the elastic properties of rocks is:
    A. density C. specific gravity E. weight
    B. porosity D. poisson’s ratio
A

D

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11
Q
  1. It refers to the maximum slope at which any loose materials comes to rest when poured or dumped
    in a pile.
    A. drain angle
    C. angle of draw
    E. working slope
    B. angle of repose
    D. gradient slope
A

B

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12
Q
  1. It is a geologic process where near surface rock or deposits are altered thru chemical action of water, plants and bacteria and the mechanical action of temperature.
    A. natural deposition
    B. metamorphism
    C. weathering
    D. sedimentation
    E. landslide
A

C

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13
Q
  1. In rock mechanics, which of the following conventions is valid in the stress and strain analysis?
    A. compressive normal stresses are taken as positive
    B. contractile normal strains are taken as negative
    C. compressive normal stresses are taken as negative
    D. the sense of positive shear is outward relative to the coordinate origin
    E. the positive directions of the coordinate axes are taken as negative
A

B

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14
Q
  1. In slope stability analysis of a mine pit, which of the following is necessary to address a slope
    stability problem?
    A. characteristics of the rock mass
    B. drainage system of the pit
    C. blasting design
    D. equipment used in the pit operation
    E. all of the above
A

E

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14
Q
  1. Rock mechanics differ from classical mechanics in terms of?
    A. none of these conditions
    B. seismic forces are not considered in classical mechanics
    C. the strength of rocks compared with steel
    D. rock mechanics is applied and appreciated only in mining
    E. in rock mechanics, the post failure characteristics of rocks are more useful
    and significant in mining than the pre-failure ones.
A

E

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15
Q
  1. It is the ratio of the voids or open spaces w/in a material versus the total volume of the said
    material:
    A. hollow factor C. moisture E. specific gravity
    B. porosity D. expansion ratio
A

B

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15
Q
  1. A rock mass classification that quantifies discontinuity by the ratio of the length of the individual
    pieces of core recovered in a drill, having lengths of 10 cm or longer, and the total length of drill
    run:
    A. fracture pattern C. fracture spacing E. RQD
    B. work index D. rock mass rating
A

E

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16
Q
  1. The ability of rocks to resist compression is called:
    A.tensile strength C. shear strength E. rock strength
    B. rigidity D. compressive strength
A

D

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17
Q
  1. A word commonly used in rock mechanics as a collective term for all fractures or features in a rock
    mass such as joints, faults, shears, etc. that have zero or relatively low tensile strengths is called:
    A. structure C. fracture plan E. discontinuity
    B.lineation D. fabric
A

E

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18
Q
  1. Which of the following natural materials possess excellent plastic properties?
    A. clay C. lignite E. gypsum
    B.anthracite D. limestone
A

A

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19
Q
  1. A record of geologic facts in their correct space relations is called what?
    A. pit design map C. aerial photograph E. assay map
    B. geologic map d. core log
A

B

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20
Q
  1. Which of the following rock formation is characterized by karst topography?
    A. diorite plug C. basalt dome E. coal formation
    B. limestone formation D. andesite formation
A

B

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21
Q
  1. Which of the following physical properties of rocks refers to the ability of rocks that resist shearing?
    A. rock work index C. tensile strength E. compressive strength
    B. rigidity D. shear strength
A

D

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22
Q
  1. It consists of one or more pieces of rock, usually between 1 to 3 meters long, and taken from a
    particular depth thru diamond drilling.
    A. fish line C. core E. dead man
    B. sludge D. blasthole cone
A

C

23
Q
  1. The strength of a fractured mass is :
    A. infinite C. nil E. unlimited
    B. zero D. purely frictional
A

B

24
Q
  1. Rocks can virtually withstand unlimited load provided that:
    A. it is initially rock bolted
    B. the load is applied slowly
    C. enough confining pressure is provided
    D. artificial support is installed
    E. a long period of loading time is allowed.
A

C

25
Q
  1. Which of the following natural materials posses the best elastic properties?
    A. lignite C. gypsum E. anthracite
    B. clay D. limestone
A

D

26
Q
  1. When a massive rock mass is faulted, what do you call the portion that is down thrown?
    A. syncline C. footwall E. anticline
    B. hanging wall D. plug
A

C

27
Q
  1. Indirect tensile strength is also called :
    A. Brazilian disc test C. ring test E. work index test
    B. tri-axial test D. rapture test
A

A

28
Q
  1. A record of geologic facts in their correct space relations is called what?
    A. pit design C. geologic map E. core log
    B. aerial photograph D. assay map
A

C

29
Q
  1. What is that field science that focuses on the study of the properties and behaviour of rocks when
    subjected to force field?
    A. rock mechanics C. slope stability E. ground control
    B. strength of materials D. soil mechanics
A

A

30
Q
  1. In rock mechanics, what do you call the rock mass designation that quantifies discontinuity by the
    ratio of the length of the individual pieces of core recovered in a drill and the total length of the drill
    run?
    A. work index C. rock mass rating E. RQD
    B. fracture spacing D. fracture pattern
A

E

31
Q
  1. The ratio of the material in its solid state as compared to its volume when broken is called what?
    A. weight/moisture factor C. powder factor E. volume/weight ratio
    B. swell factor D. coefficient of expansion
A

B

32
Q
  1. Which of the following natural properties posses the best elastic properties?
    A. limestone C. diorite E. dacite
    B. gypsum D. clay
A

D

33
Q
  1. In interpreting geologic maps, limestone is always characterized by which of the following?
    A. karst topography C. high relief E. overhangs
    B. gentle rolling terrain D. wetlands
A

A

34
Q
  1. Which of the following physical properties of rocks refers to the ratio between the volume of voids or
    open spaces inside a rock mass and the total volume of said rock mass or material?
    A. permeability
    C. porosity E. bond work index
    B. expansion ratio D. specific gravity
A

C

35
Q
  1. Which of following refers to the maximum slope at which a heap of loose material can stand
    without sliding?
    A. angle of draw C. drainage angle E. working slope
    B. gradient slope D. angle of repose
A

D

36
Q
  1. Indirect tensile strength is also called what?
    A. brazilian disc test C. rapture test E. ring test
    B. tri-axial test D. work index test
A

A

37
Q
  1. The rate of change of strain as a function of stress.
    a. Modulus of Elasticity c. Modulus of Bending e. Poisson’s Ratio
    b. Modulus of Rigidity d. Modulus of Plasticity
A

A

38
Q
  1. The strength of a fractured mass is:
    A. unlimited C. zero E. infinite
    B. purely frictional D. nil
A

C

39
Q
  1. Which of the following methods is most applicable in mapping or locating wet shears, clays and
    gravel deposits and in determining their thicknesses?
    A. gravity C telluric E. seismic
    B. magnetic D. resistivity
A

D

40
Q
  1. In interpreting topo maps, overlapping topographic contours represent which of the following
    surface formation
    A. basin C. dome E . syncline
    B.anticline D. overhang
A

D

41
Q
  1. In rock mechanics, the ratio of the stress to the strain is called:
    A. tensile strength C. poisson’s ratio E. shear strength
    B. rapture limit D. modulus of elasticity
A

D

42
Q
  1. The process of ejecting a mixture of cement and sand into the crevices of rocks, usually through a
    borehole drilled into the rock to be grouted.
    A . guniting C. grouting E. sealing
    B. shotcreting D. rockbolting
A

C

43
Q
  1. Which of the following physical properties of rocks refers to the weight of said rocks in an equivalent
    volume of water measured at sea level.
    A. porosity C. tonnage factor E. coefficient of expansion
    B. specific gravity D. bond work index
A

B

44
Q
  1. Water pressure reduces stability of pit slope by:
    A. reducing the shear strength of potential failure surfaces
    B. reducing the tensile strength of potential failure surfaces
    C. increasing the shear strength of potential failure surfaces
    D. increasing the tensile strength of potential failure surfaces
A

A

45
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 C. Stress E. aperture
    B. strain D. movement
A

C

46
Q
  1. The way to describe qualitatively in which stress and strain are related in a material under load is
    called:
    A. constitutive behavior C. poisson’s ratio E. plasticity
    B. elasticity D. stress
A

A

47
Q
  1. The term used to describe the intact rock between discontinuities is called :
    A. rock mass C. aperture E. spoils
    B. rock material D. filling material
A

B

48
Q
  1. The total in-situ medium containing bedding planes, faults, joints and other structural feature is
    called :
    A.rock material C. lithology E. filling material
    B. rock mass D. structure
A

B

49
Q
  1. It is the nature and distribution of structural features with the rock mass.
    A. stress C. geologic features
    E. rock material B. rock structure
    D. geologic contact
A

B

50
Q
  1. It is a fracture on which identifiable shear displacement has taken place.
    A. spacing C. persistence E. strain
    B. faults D. fissure
A

B

51
Q
  1. It is the perpendicular distance between adjacent discontinuities.
    A. dip C. strike E. geologic contact
    B. dip angle D. spacing
A

D

52
Q
  1. The term used to described the aerial extent or size of a discontinuity with a plane.
    A. aperture C. aerial photo E. discontinuity
    B. persistence D. stereo net
A

B

53
Q
  1. It is the stress which governs the gross mechanical response of a porous material.
    A. effective stress C. pore pressure E. porosity
    B. effective strain D. porosity
A

A

54
Q
  1. When the rock can sustain further permanent deformation without losing load carrying capacity,
    this rock is experiencing.
    A. effective stress C. effective strain E. plasticity
    B. pore pressure D. ductile deformation
A

D

55
Q
  1. It is the process by which sudden loss of strength occurs across a plane following little or no
    permanent deformation.
    A. ductile C. deformation E. yield
    B. brittle fracture D. failures
A

B

56
Q
  1. The most reliable drilling methods of exploring the interior of a rock mass prior to mining
    A. rotary drilling C. percussion drilling E. churn drilling
    B. auger drilling D. core drilling
A

D

57
Q
A

Rock Mechanics (6 decks)

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