Quiz 4 Flashcards
(160 cards)
1
Q
- 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
2
Q
- 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
3
Q
- 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
4
Q
- It is the field of study that is concerned in checking the proper-
ties and behavior of rocks when subjected to force field:
A. strength of materials
B. rock mechanics
C. slope stability
D. ground control
E. soil mechanics
A
b
5
Q
- It is the science of understanding the properties and mechanical
behavior of rocks and rock formation and the nature of stresses
within them and their immediate environment.
A. strength of materials
B. rock surveying
C. soil mechanics
D. mapping and interpretation
E. rock mechanics
A
e
6
Q
- In rock mechanics, ore core logging, RQD means:
A. rock grinding index
B. rock identification
C. rock bond index
D. rock hardness
E. rock quality designation
A
e
7
Q
- 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
8
Q
- 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.
E. none of these
A
b
9
Q
- One of the elastic properties of rocks is:
A. density C. specific gravity E. weight
B. porosity D. poisson’s ratio
A
d
10
Q
- 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 C. weathering E. landslide
B. metamorphism D. sedimentation
A
C
11
Q
- 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
12
Q
- 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
13
Q
- 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
14
Q
- 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
15
Q
- 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
16
Q
- The ability of rocks to resist compression is called:
A. tensile strength C. shear strength E. rock strength
B. rigidity D. compressive strength
A
di
17
Q
- Which of the following natural materials possess excellent
plastic properties?
A. clay C. lignite E. gypsum
B. anthracite D. limestone
A
a
18
Q
- 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
19
Q
- 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
20
Q
- 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
21
Q
- The strength of a fractured mass is:
A. infinite C. nil E. unlimited
B. zero D. purely frictional
A
b
22
Q
- In map interpretations, limestone formation is always charac-
terized by which of the following: A. wetlands C. karst topography E. overhangs
B. high reliefs D. gentle rolling topography
A
C
23
Q
- 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
24
Q
- 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
25
25. 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
26
26. 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
b
27
27. The rate of change of strain as a function of stress.
A. Modulus of Elasticity
B. Modulus of Rigidity
C. Modulus of Bending
D. Modulus of Plasticity
E. Poisson's Ratio
a
28
28. Which of the following methods is most applicable in mapping
or locating wet shears, clays and gravel deposits and in determin-
ing their thicknesses?
A. gravity C telluric E. seismic
B. magnetic D. resistivity
d
29
29. In interpreting topo maps, overlapping topographic contours
represent which of the following surface formation
A. basin C. dome E. syncline
B. anticline D. overhang
d
30
30. 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
d
31
31. 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
C
32
32. 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
E. none of these
a
33
33. 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
b
34
34. 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
C
35
35. 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
36
36. The term used to describe the intact rock between disconti-
nuities is called:
A. rock mass C. aperture E. spoils
B. rock material D. filling material
b
37
37. 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
b
38
38. 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
b
39
39. It is a fracture on which identifiable shear displacement has
taken place.
A. spacing C. persistence E. strain
B. faults D. fissure
b
40
40. It is the perpendicular distance between adjacent discontinu-
ities.
A. dip C. strike E. geologic contact
B. dip angle D. spacing
d
41
41. The term used to describe the aerial extent or size of a
discontinuity with a plane.
A. aperture C. aerial photo E. discontinuity
B. persistence D. stereo net
b
42
42. 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
43
43. 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
d
44
44. 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
b
45
45. 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
d
46
46. It is a basic technique used in mapping surface or underground
exposures.
A. structural mapping C. scanline mapping E. stereo netting
B. scanline survey D. aerial mapping
b
47
48. When the rock reach its maximum strength, usually averaged
over a plane, the rock can sustain under given set of condition.
A. Strain C. Elasticity E. Plasticity
B. Strength D. Stress
b
48
49. A description of a material used to occupy open spaces in a
discontinuity.
A. Quartz C. Water E. Ice
B. G D. Air
a
49
50. It consists of loose fragments of rock and soil that serve as
cover for the bedrock.
A. Exposure C. Regolith E. Ground
B. Outcrop D. Soil
C
50
51. When two or more rocks have different or unlike qualities.
A. Homogeneous C. Heteregenous E. Continuum
B. Isotropic D. Anisotropic
C
51
52. The strength in rock that will resist tensional forces.
A. Shear Strength C. Tensile Strength E. Rock Strength
B. Compressive Strength D. Peak Strength
C
52
53. It is ground depression caused by ground movements due to
collapse of an underground cavity.
A. Cavern C. Karst Topography E. Sinkhole
B. Setllement D. Subsidence
d
53
55. It consists of transported loose fragments containing soils and
broken rocks.
A. Floats C. Alluvium E. Talus
B. Boulders D. Spoils
e
54
56. A records of geological facts such as geologic structure and
rock types, etc.
A. Topographic Map C. Hydrographic Map E. Military Map
B. Geologic Map D. Index Map
b
55
57. A surface material derived from the in-situ weathering of rocks.
A. Residual soil C. Talus E. Boulders
B. Colluvium D. Sand
a
56
58. It is the vertical or inclined boundary surface between air and
rocks.
A. Apex C. Toe E. Slope
B. Berm D. Crest
e
57
59. It is composed of boulders of igneous rocks mixed with soil
that are cemented together to form a rock mass.
A. Breccia C. Agglomerates E. Lahar Flows
B. Conglomerates D. Tuff
C
58
60. A body of rocks beneath a mantle of soil and is formed from
the crust of the earth.
A. Dikes C. Bedrock E. Sill
B. Rock mass D. Batholiths
C
59
61. Shear strength is a material's ability to
A. resist compression C. resist sliding on a plane E. resist friction
B. resist tension D. withstand weathering
C
60
62. A rock that is sufficient strong to transmit a compressive force
under a given conditions.
A. Competent Rock C. Intact Rock E. Hard Rock
B. Competent Ground D. Solid Rock
a
61
63. It is a type of ground that does not require support when a
tunnel is excavated through it.
A. Firm Ground C. Heavy Ground E. Compacted Ground
B. Running Ground D. Competent Ground
d
62
64. A hard and solid body of rocks that is free of rock defects and
absence of discontinuities.
A. Bedrock C. Dike E. Intact Rock
B. Batholith D. Basalt
e
63
65. It is consist of loose of rocks and soil that act as cover for a
bedrock.
A. Matte/Regolith C. Spoil E. Colluvium
B. Muck D. Alluvium
a
64
66. It is concerned with the mechanical responses of all geological
materials including soil.
A.Mineral Mechanics C. Geomechanics E. Engineering Mechan-
ics
B.Rock Mechanics D. Soil Mechanics
C
65
67. The rock in which the ore body is confined or enclosed.
A. Country Rock C. Quartz E. Outcrop
B. Regolith D. Waste Rock
A
66
68. The maximum stress that the rock material can sustain under
a given set of condition.
A. Safe Bearing Capacity C. Peak Strength E. Shear Stress
B. Hardness D. Modulus of Deformation
C
67
69. A underground water confined by a layer of impervious mate-
rial preventing the water from percolating to its natural level.
A. Groundwater C. Confine Water E. Perched Water
B. Brackish Water D. Run-off water
E
68
70. It is composed of sedimentary rocks consisting largely of
angular fragments embedded in a fine-grained matrix.
A. Breccia C. Agglomerates E. Lahar Flows
B. Conglomerates D. Tuff
A
69
71. It is composed of sedimentary rocks consisting mainly of
rounded pebbles cemented together
by another material substance.
A. Agglomerates C. Sandstone E. Breccia
B. Conglomerates D. Alluvium
B
70
72. It is minor downward movement of soil and rocks along slope
with some roots and twigs of
trees are still usually present.
A. Erosion C. Mass Movement E. Creep
B. Landslide D. Avalanche
E
71
73. It is a process whereby earthy or rock material is loosened or
dissolved and removed from any
part of the earth's surface caused mostly by running water.
A. Landslide C.. Erosion E. Avalanche
B. Creep D. Slope Failure
C
72
74. A finely abraded material occurring between the walls of a fault
as result of grinding movement.
A. Soil C. Clay E. sediments
B. Gouges D. Silt
B
73
75. It is the change in temperature of the subsurface rocks ex-
pressed either in degrees per unit depth.
A. Magmatic Heat C. Geothermal Gradient E. Latent Heat
B. Hydrothermal Heat D. Exothermic Heat
C
74
76. 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
75
77. It is study of all types of deformation - elastic, plastic, and
viscous particularly plastic flow of solids.
A. Lithology C. Petrology E. Geology
B. Rheology D. Sedimentology
B
76
78. The cause of a natural ground movement created by motions
or displacement of materials beneath the earth's crust.
A. Volcanic C. Seismic E. Mass Movement
B. Tectonic D. Plutonic
B
77
79. Which of the following factors that will not contribute a Slope
Failure? A. Type of rock in slope C. Vegetation E. Weight of slope material
B. Geologic Structure in slope D.Groundwater
C
78
80. Which of the following is not activity in assessing a slope
failure?
A. Detailed Geologic Mapping C. Picture-taking E. Trenching
B. Groundwater Measurements D. Monitoring of Slope Behavior
E
79
81. It consists of rock backfill or massive reinforced concrete
placed at the toe of failing zone.
A. Retaining Wall C. Anchor Bolts E. Toe Buttress
B. Grouted Riprap D. Grouting
B
80
82. Which of the following is not needed is slope stability analysis?
A. Specific Gravity of rock C. Rock Properties E. Stress Measure-
ment
B. Geology of the slope D. Hydrology
A
81
83. The recommended natural slope inclination for residual soils
is:
A. 15-30 degrees C. 40-50 degrees E. 60-70 degrees
B. 30-40 degrees D. 50-60 degrees
B
82
84. Which of the following is a sign of slope instability?
A. Highly Fractured slope C. presence of weep holes E. Grouted
riprap
B. Competent Ground D. Toe Buttress
A
83
85. A geomechanic classification in computing rockmass rating to
provide a stable ground support
and appropriate excavation method.
A. Barton Q-System C. Rock Structure Rating E. Deere, RQD
System
B.Bienswski RMR D. Terzaghi Rock Load
B
84
86. A branch of civil engineering discipline that applies scientific
methods of engineering principles
to the materials of the earth's crust for the solution of engineering
problems.
A. Rock Mechanics C. Soil Mechanics E. Geotechnics
Engineering Geology D. Geomechanics
E
85
87. A plane that marks a change in the physical and chemical
character of the rock material.
A. Bedding Plane C. Discontinuity E. Strain
B. Fracture Zone D. Axial Plane
C
86
88. It is the ratio of the weight of the material to the weight of an
equal volume of water.
A. Void Ratio C. Porosity E. Density
B. Specific Gravity D. Permeability
B
87
89. It is a character of porous rocks that permits the passage of
fluids or water through its
interconnecting voids.
A. Porosity C. Cavernous E. Void Ratio
B. Permeability D. Fissure
B
88
90. A mechanical properties of rocks that resist abrasion.
A. Hardness C. Ductility E. Shear
B. Deformability D. Tension
A
89
91. A method of testing rock strength that will determine the extent
to which the rockmass deforms
under various externally applied loads.
A. Plate Bearing Test C. Tension Test E. Shear Test
B. Jacking Test D. Standard Penetration Test
A
90
92. It is the maximum load of the rock that can safely imposed on
an undisturbed rockmass. A. Virgin Stress C. Tensional Stress E. Wind Load
B. Safe Bearing Pressure D. Gravitational Force
B
91
93. When a slope is considered unstable, which of the following is
not a sign of instability?
A. Rock Fall C. Competent Rock E. Erosion
B. Fractures D. Creeping
C
92
94. When monitoring an unstable slope, which of the following
activities records the groundwater
movement and/or fluctuations?
A, Installation of weepholes C. installation of piezometers E.
permeability test
B. Drilling of horizontal drains D. Seepage measurements
C
93
95. In Terzaghi Rock Mass Classification, which of the following
technical information is not included in his analysis?
a.rock condition b.groundwater c.tunnel dimensions d.tunnel
strike/dip e.rock discontinuity
D
94
95. Brazilian test is used to determine what type of strength
parameters of rocks?
A. direct tension strength C. compressive strength test E. indirect
shear test
B. indirect tension strength D. direct shear test
B
95
96. It defines the shear stress components vanish, that is possible
to select a particular orientation for
a plain such that it is subject to normal stress.
A. Stress Transformation C. Principal Stress E. Residual Stress
B. Stress Invariance D. Principal Plane
D
96
97. It is the process by which sudden loss of strength occurs
across a plane following little or no
permanent deformation.
A. Brittle Fracture C. Failures E. Ductile
B. Deformation D. Strain
A
97
98. It pertains to the surface of unevenness and waiveness of the
discontinuity relative to its mean
plane.
A. Roughness C. Contour Line E. Texture
B. Persistence D. Luster
A
98
99. The distance range of discontinuity spacing which is consid-
ered as very wide spacing.
A. 10-25mm C.22cm E. <30mm
B. 10-20mm D. <20mm
C
99
100. The distance range used of discontinuity spacing which is
considered as extremely close spacing.
A. 200-600mm C. 2500-3000mm E. 300-500mm
B. 200-600mm D. >6000mm
B
100
101. A type of rockmass where the RQD of the core samples
ranges from 75-90 percent
a.excellent b.good c.fair d.very poor e.poor
B
101
102.A joint classification in rocks that has 6-10 joints per meter.
a.jointed b.slightly jointed c.very jointed d.extremely jointed
crushed
C
102
103.A weathering classification of rocks that showed all rock
material are disintegrated and/or decompose to soil and traces of
original structure and texture are preserved.
a.highly weathered b.completely weathered c.slightly weathered
d.moderately weathered e.fresh
A
103
104. In rock mechanics, the term "ground" consist mainly of the
following earth materials. a.talus and floats
b.sand and gravel
c.purely soil
d.rocks
e.soil and rocks
e
104
105.An igneous rocks whose coarse crystals are embedded into
a fine-textured matrix.
a.porphyry
b.plutonic
c.breccia
d.metasediments
e.agglomerates
A
105
106. The amount of voids based on the total volume of rocks
a.permeability
b.porosity
c.Karst
d.Poisson's ratio
e.void's ratio
B
106
107.lt is the ratio of the volume of voids to the volume of solids of
the rock.
a.permeability
b.porosity
c.Karst
d.Poisson's ratio
e.void's ratio
E
107
108.A hairline crack in rock along with no noticeable displacement
that occurred.
a.fault
b.bedding
c.joint
d.fracture
e.fissure
C
108
109.A crack in rocks that extends even kilometers in length, thou-
sands meters deep and proportionally wide.
a.fault
b.bedding
c.joint
d.fracture
e.fissure
A
109
110.lt is used to reinforce rock slopes to prevent rock blocks from
falling away from the main rock mass when isolated by joints and
faults.
a.wire mesh with shotcrete
b.grouted riprap
c.retaining wall
d.toe buttress
e.rock bolting
E
110
111.It is the maximum and minimum compressive stresses on the
boundary of an opening.
a.effective stress
b.in-situ stress
c.residual stress
d.virgin stress
e.critical stress
E
111
112. Which of the following is considered as the good cementing
agents or binders on the grains in rocks?
a.clay
b.calcite
c.limestone d.quartz
e.ferrous minerals
D
112
101. A geophysical exploration instruments that produce elastic
waves that penetrates into the
subsurface materials to detect the presence oil and mineral
deposits.
A. Magnetometer C. Eotvos Torsion Balance E. Seismograph
B. Gravimeter D. Radar
b
113
102. An instrument used that determine the coordinates of the
certain location during surface mapping.
A. Brunton Compass C. Altimeter E. Telescope
B. Global Position System D. Geostick
B
114
103. When a soil or rock mass ceases to absorb more water during
heavy downpour, it has reached its:
A. absorption limit C. groundwater level E. critical level
B. saturation level D. unsaturated level
B
115
104. It is one that requires immediate support when a tunnel is
excavated through it.
a.running/heavy ground
b.competent ground
c.loose ground
d.incompetent ground
e.soft ground
A
116
104. A failure in rock slope that occurs below the toe of the bank.
A. Base Failure C. Slope Failure E. Bench failure
B. Slip circle failure D. Toppling
A
117
105. A failure in rock slope that occurs intermediate between the
crest and the toe.
A. Base Failure C. Slope Failure E. Bench failure
B. Slip circle failure D. Toppling
C
118
106. Strain is defined as
A. the change in length divided by the original length
B. the original length divided by the change in length
C. the force causing the deformation divided by the change in
length
D. the change in length divided by the force that caused the
deformation
E. the load of the external material causing the deformation
A
119
107. It is a displacement created when two formerly adjacent
points situated on opposite walls of the fault.
a.dip slip
b.strike slip
c.net slip
d.fault plane
e.hade
C
120
107. A structure formed due to tensional and compressional
forces.
A. fault C. fissure E. fault
B. joint D. fracture
A
121
108. A fault block generally long compared to its width that lowered
relatively to the blocks
of the other side.
A. horst C. fault block E. footwall
B. graben D. hanging wall
B
122
110. A fault which the hanging wall move relatively downward and develops due to tensile stress. A. normal fault C. reverse fault E. strike slip fault
B. oblique fault D. thrust fault
A
123
111. A polished, striated and smooth surface due to fault block
movements.
A. fault trace C. slickenside E.breccia
B. mylonite D. fault scarp
C
124
112. A fracture in the rock mass along which the rocks on one side
have moved relative to the other
side.
A fault C joints E fissure
B fracture D folds
A
125
113. It is the intersection of a fault at the surface of the earth.
A fault line C fault outcrop E fault trace
B. fault axis D fault plane
A
126
114. A type of fold in which the hinges are sharp and angular.
A. anticline C. chevron E. drag
B. box D. symmetrical
C
127
115. A line formed by the intersection of the axial plane of the
folded rock structure.
A. hade C trough line E apex
B. hinge line D crest line
B
128
116. A part of a fold located at the outer parts and moves away
from the fold axis.
A. trough C. crest E. limb
B. bed D. axis
E
129
117. A structure develops when rocks undergo permanent plastic
deformation.
A. fault C. fissure E.unconformity
B. fold D. fracture
B
130
118. A deformation occurring in sedimentary rocks containing well
developed zones of
weaknesses.
A. brittle deformation C. elastic deformation e. tensional
B. plastic deformation D. shear deformation
B
131
119. A type of stress which results in shortening and flattening.
A. compressive C. tension E. virgin
B. shear D. residual
C
132
120. It is an angle between the fault plane and the vertical plane
that strikes parallel to the fault.
A. dip C. hade E. azimuth
B strike D. bearing
C
133
121. An imaginary line formed perpendicular to the strike direction
of a bedding plane.
a.dip
b.strike
c.hade
d.bearing
e.azimuth
A
134
122.\ When molten rocks rise to the earth surface, its high temper-
ature will result to corresponding increase in:
a.speed
b.length
c.volume
d.crystallization
e.pressure
E
135
123.A distinguishing evidence of a fault structure at the surface of
the earth. a.gouges
b.discontinuity of beds
c.surface cracks
d.ground subsidence
e.ground settlement
b
136
124. It is the effects of surficial movements such as downhill move-
ments of rocks or mountain glaciers on the rock mass.
a.fracture
b.subsidence
c.joints
d.faults
e.settlement
C
137
125. When two or more rocks have the same and equal properties
in all directions.
a.homogeneous
b.isotropy
c.heterogenous
d.anisotropy
e.inhomogeneity
D
138
126. In rock mechanics, which of the following term is not a part of
the classification of a soil?
a.clay
b.silt
c.sand
d.gravel
e.boulder
E
139
127 Are layers of relatively thick and continuous layers mainly of
clay that often surrounds rock fragments but are not in contact
with both discontinuity walls.
a.ground
b.gouge
c.spoil
d.alluvium
e.metasediment
B
140
128.lt is the principal stress along and perpendicular to the tunnel
wall.
a.residual stress
b.tangential stress
c.gravitational stress
d.effective stress
e.critical stress
B
141
129. In rock excavation on tunnels/adits using mechanical grinding
excavation are restricted only to soil and moderately strong rock
masses with an intact rock strength of:
a.100 MPa
b.50 MPa
c.150 MPa
d.120 MPa
e.200 MPa
B
142
130. When using a Tunnel Boring Machine (TBM) or Raise Borers
in rock excavation, the resulting damage and condition of exca-
vation walls will be:
a.high damage and rough
b.low and smooth
c.high damage and smooth
d.medium low damage and smooth
e.low and rough
B
143
131. Based on rock mechanic studies for underground support, it
is considered as the cheapest forms of rock bolting where a drilled hole is inserted with steel, rebar, cable and wood or even bamboo
and filled with cement.
a.anchor bolting
b.dowels
c.tension bolting
d.split-set bolting
e.swellex
b
144
132. The author who introduced to classify rockmass based on the
RQD of the core samples as obtained from rock drilling as basis
for excavation type and support system.
a.Barton
b.Beiniaswski
c.Wickham
d.Terzaghi
e.Deere et. Al
E
145
133.A rock classification that can be easily determine by driving a
hammer into the rock core and produces a death sound.
a.hard rock
b.very hard rock
c.medium hard rock
d.soft rock
e.slight hard rock
A
146
134. It is used to determine the deformability of in-situ rocks carried
out in excavated underground test galleries in rock.
a.Plate Bearing Test
b.Jacking Test
c.Pressure Chamber test
d.Borehole Deformation Test
e.Shear test
B
147
135.lt is a slope protection measures which consist of rock backfill
or massive reinforced concrete and ideal for small soil and rock
slides.
a.grouting
b.rock bolting
c.retaining wall
d.grouted riprap
e.shear test
B
148
136. When rockmass undergo permanent plastic or ductile defor-
mation, what type of geologic structure is formed?
.fracture
b.fault
c.fold
d.joint
e.fissure
C
149
137.When rockmass undergo brittle deformation, what type of
geologic structure is formed?
a.fracture
b.fault
c.fold
d.joint
e.fissure
B
150
138.lt is a ground depression caused by the collapse of the
walls of an underground cavity or sinkhole created during intense
loading or ground movements.
a.ground subsidence
b.ground settlement
c.ground failure
d.surface rupture
e.ground slumping
A
151
139. When rock will undergone weathering and disintegration it will
transform into:
a.boulders
b.sediments
c.cobbles
d.gravel
e.spoils
B
152
140.lt is a deformation from compressive forces in the crust re-
sulting in gentle warping of horizontal strata.
.fracture
b.fault
c.fold
d.joint
e.fissure
C
153
141. When a sediments changes/transform into sedimentary
rocks, it undergoes the process of:
a.weathering and erosion
b.cementation and compaction
c.solidification
d.melting
e.crystallization
B
154
142. It is a character of the rockmass that the same properties in
same directions at a certain unspecified location.
a.homogeneity
b.anisotropy
c.isotropy
d.inhomogeneity
e.conformity
C
155
143. Using rock mechanic study for an open pit mine, which of the
following factors is the least to be considered in the mine design?
a.pit slope
b.excavation method
c.drainage system
d.blasting technique
e.bench width
C
156
144. When a rock undergone heavy weathering and decomposi-
tion and transform into clay components, its compressive strength
is estimated to be at:
a.2 MPa
b.1 MPa
c.5 MPa
d.6 MPa
e.3 MPa
B
157
145. In designing an underground tunnel, what is the most impor-
tant rockmass characteristic to be considered?
a.physical character
b.rock hardness
c.origin and composition of rocks
d.strength character
e.rockmass structure
D
158
146.in rock mechanic study for a certain UG mine, which of the
following factors is the least to be considered?
a.blasting technique
b.mucking and loading
c.blasthole drilling method
d.underground support system
e.drainage system
B
159
147. In rock mechanics, it utilizes the seismic waves velocity obtained seismic refraction survey on a certain rock mass as basis in rock excavation methods.
a.resistivity
b.rippability
c.zero
d.purely frictional
e.infinite
b
160
148. Unconfined compressive strength of rocks is determined us-
ing what laboratory equipment:
a.Shear box
b.Brazilian disc test
c.UTM
d.Schimdt Hammer
e.Jack Hammer
C
