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WorksheetsDPWH Field Engineers Geohazard Quiz
Total questions: 23
Worksheet time: 17mins
In seismic considerations of stability of slopes what component of the peak ground acceleration is mainly used?
Vertical
Horizontal
Which of the following is the main consequences of liquefaction of soil during earthquakes?
vertical settlement
horizontal displacement
What is the formula for the calculation of seismic horizontal coefficient, KH using (Hynes-Griffin and Franklin, 1984; DPWH-GGA, 2018)?
KH = PGA x 0.5
KH = PGA x 0.1
KH = PGA x 0.3
KH = PGA x 0.6
Where can you obtain Peak Ground Acceleration and Spectral Acceleration (0.2sec and 1.0sec) for Bridges?
DPWH BSDS 2013
DPWH DGCS 2015
Which of the following method is used for calculating Liquefaction Triggering (Factor of Safety) for Buildings?
Youd and Idriss, 2001; NCEER 1998
Idriss and Boulanger, 2014
Which of the following method is used for calculating Liquefaction Settlement (vertical settlement in mm) for Buildings?
Youd and Idriss, 2001; NCEER 1998
Idriss and Boulanger, 2014
Which of the following is true regarding fault displacement?
Occurs in Active Faults
DOST-PHIVOLCS recommends a five (5) meter buffer zone (no build zone) away from active faults
Distance to active faults can be determined from PHIVOLCS-Hazard Hunter PH
All of the above
What will happen to the slope if we add load at the head (upper part)?
Destabilize (lower FoS)
Stabilize (higher FoS)
What will happen to the slope if we add load at the toe (lower end of failure surface)?
Destabilize (lower FoS)
Stabilize (higher FoS)
Given a problematic road section, which of the following may further indicate slope instability?
Cracks at the mountain side of road section
Fallen trees at the mountain side of road section
A and B
Given a problematic road section, which of the following may further indicate slope instability?
River erosion at the ravine side of the road section
Bumpy ground at the ravine side of the road section
A and B
At what % (by volume) of decomposition/weathering do rocks start behaving mechanically like soils (homogenous strength; failure thru circular surfaces)?
50% decomposed and above (>50%)
50% decomposed and below (<50%)
Which of the following can be used to prevent failure on a soil slope?
Soil nails
Rock bolts
Both
Which of the following can be used to protect motorists from highway rockfalls?
Rock fall fences
Rock fall walls
Rock fall ditches
All of the above
What is the distance recommended by PHIVOLCS and DPWH DGCS for delineating no-build zone around active volcanoes?
20 km
2 km
Which of the following can indicate the potential height of floods?
Mud marks in walls, posts, trees etc.
Plant debris walls, posts, trees etc.
Both
As per DGCS, the foundation of river protection structures should be?
Foundation should be below scour depth
Foundation should be above scour depth
Erosion, scour are typically caused by what change in the river?
Increase in flow velocity
Decrease in flow velocity
Which of the following can indicate expansive soils?
In dry season, hexagonal cracks in soil
In wet season, heaving of light structures
Both
Which of the following can indicate Peats, Organics, and Compressible Soils?
Sinking SPT hammer
SPT-N <2
Very soft black/brown soils in poorly drained areas
All of the above
What is the buffer distance for no-build zone in coastal areas as per PD1067?
40 meters
4 meters
400 meters
In the context of DPWH projects, presence of caves along an alignment are...
hazards
legally-protected natural features where construction is practically prohibited an can cause extensive delays
What were the professions of Karl Von Terzaghi, father of modern Soil Mechanics?
Geologist
Mechanical Engineer
Geotechnical Engineer
All of the above
