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AL-MANSOUR UNIVERSITY COLLEGE
FINAL EXAMINATION- First Attempt - 2011- 2021
Subject: Engineering Geology
Dept: Civil Engineering
Date: 26th
May 2012 Year: 1st Year
Time: 3 Hours Examiner: Ehab T. Ibrahem
Note: Answer FOUR questions only
Q1- Choose the correct answer for eight of the following.
1. Boundaries between earth layers:
a) have been discovered over last 300 years. b) are places where there is abrupt change in the
density of the rock. c) are defined by abrupt changes in earthquake wave velocity.
d) are places where ungrounded water abrupt changes.
2. Which of the following statements is FALSE? Orthorhombic system:
a) has 3 axes and a=b=c. b) has 3 axes and a⊥b⊥c.
c) has 3 axes and b⊥c⊥a. d) has 3 axes and a≠b≠c
3. Large meandering and oxbow lake can be found in the river at his:
a) levees. b) old stage. c) maturity stage. d) alluvial fan.
4. Tilted unconformity strata are a sign of:
a) corrosion. b) compression. c) tension. d) erosion.
5. In soil compaction:
a) the permeability for water increases. b) the porosity increases.
c) the stability increases. d) the grin size increases.
6. We can make the confirmation of previous site investigation results at the :
a) end of investigation. b) detailed stage investigation.
c) preliminary stage investigation. d) beginning of investigation.
7. Ripple marks mainly occur in :
a) sedimentary rock. b) metamorphic rock. c) minerals. d) igneous rocks.
8. Which of the following statements are TRUE? In the artesian well the piezometric surface:
a) lies under ground level. b) lies near ground level.
c) lies parallel to ground level. d) lies above ground level.
9. If the hanging wall in fault slips down, this mean that there is a fault type:
a) reveres. b) normal. c) thrust. d) overturned.
10. Which is not a physical property commonly used in the lab or field to identify minerals?
a) color. b) streak. c) diffraction. d) specific gravity.
Q2- State whether each of the following statements is TRUE or FALSE and correct the FALSE
one – (answer eight ONLY).
1. Micas has two cleavage surfaces.
2. Olivine is one of the silicate minerals.
3. Hexagonal system contains four axes, three horizontal axes of the same length and intersection at
90°.
4. Mohs' scale used to measure mineral color.
5. The agents of metamorphism include weathering, erosion, transportation and deposition.
6. Fold is called plunging if its axial plane is horizontal.
7. Normal faults are formed by tension forces.
8. A topographic map is a three dimension diagram represents the vertical projection of different
elevations of an area with a specific scale.
9. River capacity is the maximum load a river can carry.
10. Sand is a good example of porous and pervious material.
Page 2 of 2
39.12
12.80
92.41
49.03
52.27
75.83
Q3 -A- A river flows in a channel with semicircular cross-section of width 30m. After a storm
upstream, the river is found to be just within its bank and flowing at 14.2 m/s.
a) Calculate the discharge.
b) Find the volume of water that flows through the cross-section in 4.0 hrs.
B- A block model with
(92.41×75.83×49.03)m in dimensions shows rock outcrop, find:
a) Strike & dip directions.
b) True and apparent dip angles.
Q4- A- An aquifer with cross-section of 260 m as
horizontal width and 40 m as vertical
thickness under water table lying at a depth
36 m from earth surface. The discharge at
this section is 3360 m3/d and the yield
porosity is 29%.
Find:
a) Darcy's velocity.
b) Actual velocity of aquifer water.
d) Calculate aquifer cross-sectional area.
B- Give main titles ONLY for.
a) Stages of river developments, b) Earth crust, and c) Classification of metamorphic rocks.
Q5 -A- For the topographic map shown in
the figure, the contour lines are in
meters:
a) Construct topographic profile
along line X-Y.
b) What are the possible
elevations values of point A.?
B- Give title for each of the following figures, the title name will show the geology phenomenon
that you are seeing.
(a) This photo taken from airplane. b) Railway line. (c) 10m from camera. (d) 3m from camera.
N
Outcrop rock
Ground surface
Water level
260
40
Ground surface
Water level
Impermeable rock layer
Page 1 of 3
AL-MANSOUR UNIVERSITY COLLEGE
FINAL EXAMINATION- First Attempt - 2011- 2021
Subject: Engineering Geology
Dept: Civil Engineering
Date: 26th
May 2012 Year: 1st Year
Time: 3 Hours Examiner: Ehab T. Ibrahem
Note: Answer FOUR questions only Marks are equal for each question.
Q1- Choose the correct answer for eight of the following.
Solution :
1 2 3 4 5 6 7 8 9 10
c a c d c b a d b c
Q2- State whether each of the following statements is TRUE or FALSE and correct the FALSE
one – (answer eight ONLY).
Solution:
1. Micas has two cleavage surface. False
Micas has one cleavage surface.
2. Olivine is one of the silicate mineral. Correct
3. Hexagonal system contains four axes, three horizontal axes of the same length and intersection at
90°. False
Hexagonal system consist four axes, three horizontal axes of the same length and intersection at 120°.
4. Mohs' scale used to measure mineral color. False
Mohs' scale used to measure mineral hardness.
5. The agents of metamorphism include weathering, erosion, transpo0pportation and deposition.
False The agents of sediments include weathering, erosion, transportation and deposition
6. Fold is called plunging if its axial plane is horizontal. False
Fold is called plunging if its axial plane is not horizontal.
7. Normal faults are formed by tension forces. Correct
8. A topographic map is a three dimension diagram represents the vertical projection of different
elevations of an area with a specific scale. False
A topographic map is a two dimension diagram represents the horizontal projection of different
elevations of an area with a specific scale
9. River capacity is the maximum load a river can carry. Correct
10. Sand is a good example of porous and pervious material. Correct
Q3 -A- A river flows in a channel with semicircular cross-section of width 30m. After a storm
upstream, the river is found to be just within its bank and flowing at 14.2 m/s.
a) Calculate the discharge.
b) Find the volume of the water that flows through cross-section in 4.0 hrs.
Solution:
a) Q = 1/2 (π D2/4) V = 1/2 (( π 30m)
2/4) (14.2 m/s) = 5018.694 m
3/s
b) V = QT = 5018.694 m3/s ( 4 × 3600 s) = 72.269 ×10
6 m
3
Page 2 of 3
39.12
12.80
92.41
49.03
52.27
75.83
B- A block model with (92.41×75.83×49.03)m dimensions shows rock outcrop block model, find:
a) Strike & dip direction.
b) True and apparent dip angle.
Solution:
a) Strike dir Angle = 90 +
Dip dir Angle = + 90 = 207.894 N
b) True dip angle =
Apparent dip angle =
Q4- A- An aquifer with cross-section, 260 m as
horizontal width and 40 m as vertical
thickness under water table lying at depth
36 m from earth surface. The discharge at
this section is 3360 m3/d and the yield
porosity 29%.
It is required to find:
a) Darcy's velocity.
b) Actual velocity of aquifer water.
d) Calculate aquifer cross-sectional area.
Solution: d) A = w. h = 260 ×40 = 10400 m
2
a) Q =A. VD Q = 3360 m3/d / (24 ×3600) = 0.0388 m3/d
0.0388 m3/d = 10400 m2 VD
VD =3.739 ×10-6
m/s
b) VD = ny V
3.739 10-6
m/s = 0.29 × V
V = 1.289× 10-5
m/s
= 0.01289 mm/s
B- Give titles ONLY for.
a) Stages of river developments, b) Earth crust, and c) Classification of metamorphic rocks.
Solution:
No. a b c
1 Youth stage Sial Foliated metamorphic rock
2 Maturity stage Sima Non - Foliated metamorphic rock
3 Old stage
Water table
Water table
260
40
N
Outcrop rock
40.14
49
.03
26.32
39.12
12.80
Page 3 of 3
Q5 -A- For the topographic map shown in the figure. The contour lines are in meters:
a) Construct topographic profile along line X-Y.
b) What are the possible elevations values of point A.?
Solution: a)
b) Possibility elevation of point A = 21 to 29 m
B- Give title for each figure, the title name will show the geology phenomenon that you are seeing.
(a) This photo taken from airplane. b) Railway line. (c) 10m from camera. (d) 3m from camera.
Strike slip fault Folding Columnar joint Reveres fault
