DPWH BOOKING-INA EXAM
REPORTED QUESTIONS AND
ANSWERS
What is the requirement for leveling and manipulating embankment layers? - Answer-
Continuous leveling and manipulating are required to assure uniform density as
compaction progresses.
What is the role of the Engineer during the compaction process? - Answer-To make
density tests of compacted material and ensure compliance with specified conditions.
What happens if the embankment material is classified as rock? - Answer-It must be
deposited, spread, and leveled with sufficient fine material to fill the interstices for a
dense compact embankment.
What must be done to the embankment before covering a lift with another? - Answer-
Compaction must comply with the requirements specified.
What is the minimum width for compaction trials required by the Engineer? - Answer-
Not less than 10 m wide and 50 m long.
What is the significance of the relationship between compaction equipment and the
number of passes? - Answer-It determines the effectiveness of compaction and ensures
that specified density is achieved.
What is the maximum thickness of layers when using vibratory rollers with high
compactive effort? - Answer-Thicker layers may be placed if density requirements are
attained and approved by the Engineer.
What must be done to the lower part of the fill when constructing across low swampy
ground? - Answer-It may be constructed by dumping successive loads in a uniformly
distributed layer to support hauling equipment.
What is the requirement for the Contractor regarding in-situ density tests? - Answer-At
least one group of three tests must be carried out for each 500 m of each layer of
compacted fill.
What must be maintained during the construction of the roadway? - Answer-The
roadbed must be well drained at all times.
,What should be constructed to avoid erosion damage to embankments? - Answer-Side
ditches or gutters.
What care must be taken when depositing embankment near structures? - Answer-
Avoid compacting the area adjacent to the structure to prevent overturning or excessive
pressure.
When can fill adjacent to the end bent of a bridge be placed higher? - Answer-Only after
the superstructure is in place.
What is required for rounding slopes in road construction? - Answer-The tops and
bottoms of all slopes must be rounded as indicated on the Plans.
What adjustments should be made to slopes to avoid injury to trees? - Answer-
Adjustments should be made to avoid injury to standing trees or marring of weathered
rock.
What should be done to the roadbed after it has been substantially completed? -
Answer-Remove any soft or unstable material and bring low sections to grade with
suitable selected material.
What is the requirement for earth slopes after construction? - Answer-They should be
left with roughened surfaces but be reasonably uniform and conform to the Plans.
What is the slope ratio for cut slopes in rippable material? - Answer-Between 0.75:1 and
2:1.
What is the maximum diameter of rocks allowed in permanent earth berms? - Answer-
No rocks having a diameter greater than 0.25 the height of the berm.
What must be done to ensure compacted berm construction? - Answer-Material must
be moistened or dried and placed as necessary, containing no frozen material or
deleterious materials.
What is the method of measurement for embankment payment? - Answer-The volume
of material compacted in place, accepted by the Engineer.
What is included in the payment for embankment construction? - Answer-The cost of
excavating, hauling, stockpiling, and all other costs incidental to the work.
What does the subgrade preparation consist of? - Answer-Preparation of the subgrade
for the support of overlying structural layers.
What must be completed before starting subgrade preparation? - Answer-All culverts,
cross drains, ducts, ditches, drains, and drainage outlets.
, What are the permitted variations for the finished compacted surface of the subgrade? -
Answer-+20 mm and -30 mm from the design level of surface.
What is the permitted surface irregularity measured by a 3-m straight edge? - Answer-
30 mm.
What is the permitted variation from design crossfall or camber? - Answer-±0.1%.
What is the permitted variation from design longitudinal grade over 25 m length? -
Answer-0.5%.
What must be excavated in common excavation for subgrade preparation? - Answer-All
materials below subgrade level in earth cuts to a depth of 150 mm or as directed by the
Engineer.
What is the requirement for material disposal if unsuitable? - Answer-The material shall
be disposed of in accordance with the requirements of Subsection 102.2.9.
What depth should the surface be compacted to after material removal from below
subgrade level? - Answer-The surface shall be compacted to a depth of 150 mm.
What must be done to surface irregularities under the subgrade level in rock
excavation? - Answer-They shall be leveled by placing specified material and
compacted as per Subsection 104.3.3.
What should be done to unstable material on an embankment? - Answer-It should be
removed, and low sections should be brought to grade with suitable material.
What methods can be used to shape and compact the roadbed? - Answer-Scarifying,
blading, dragging, rolling, or other necessary methods.
What is required when constructing new pavement over existing Portland Cement
concrete? - Answer-The slab must be broken into pieces no greater than 500 mm and
compacted as specified.
What is the procedure for existing asphalt concrete pavement before new pavement
construction? - Answer-The pavement shall be scarified, loosened, reshaped, and
recompacted.
What is the contractor's responsibility regarding completed work? - Answer-The
contractor must protect and maintain the work in good condition until completion.
What equipment is required for compaction? - Answer-Compaction equipment must be
capable of meeting compaction requirements without damaging the material.
REPORTED QUESTIONS AND
ANSWERS
What is the requirement for leveling and manipulating embankment layers? - Answer-
Continuous leveling and manipulating are required to assure uniform density as
compaction progresses.
What is the role of the Engineer during the compaction process? - Answer-To make
density tests of compacted material and ensure compliance with specified conditions.
What happens if the embankment material is classified as rock? - Answer-It must be
deposited, spread, and leveled with sufficient fine material to fill the interstices for a
dense compact embankment.
What must be done to the embankment before covering a lift with another? - Answer-
Compaction must comply with the requirements specified.
What is the minimum width for compaction trials required by the Engineer? - Answer-
Not less than 10 m wide and 50 m long.
What is the significance of the relationship between compaction equipment and the
number of passes? - Answer-It determines the effectiveness of compaction and ensures
that specified density is achieved.
What is the maximum thickness of layers when using vibratory rollers with high
compactive effort? - Answer-Thicker layers may be placed if density requirements are
attained and approved by the Engineer.
What must be done to the lower part of the fill when constructing across low swampy
ground? - Answer-It may be constructed by dumping successive loads in a uniformly
distributed layer to support hauling equipment.
What is the requirement for the Contractor regarding in-situ density tests? - Answer-At
least one group of three tests must be carried out for each 500 m of each layer of
compacted fill.
What must be maintained during the construction of the roadway? - Answer-The
roadbed must be well drained at all times.
,What should be constructed to avoid erosion damage to embankments? - Answer-Side
ditches or gutters.
What care must be taken when depositing embankment near structures? - Answer-
Avoid compacting the area adjacent to the structure to prevent overturning or excessive
pressure.
When can fill adjacent to the end bent of a bridge be placed higher? - Answer-Only after
the superstructure is in place.
What is required for rounding slopes in road construction? - Answer-The tops and
bottoms of all slopes must be rounded as indicated on the Plans.
What adjustments should be made to slopes to avoid injury to trees? - Answer-
Adjustments should be made to avoid injury to standing trees or marring of weathered
rock.
What should be done to the roadbed after it has been substantially completed? -
Answer-Remove any soft or unstable material and bring low sections to grade with
suitable selected material.
What is the requirement for earth slopes after construction? - Answer-They should be
left with roughened surfaces but be reasonably uniform and conform to the Plans.
What is the slope ratio for cut slopes in rippable material? - Answer-Between 0.75:1 and
2:1.
What is the maximum diameter of rocks allowed in permanent earth berms? - Answer-
No rocks having a diameter greater than 0.25 the height of the berm.
What must be done to ensure compacted berm construction? - Answer-Material must
be moistened or dried and placed as necessary, containing no frozen material or
deleterious materials.
What is the method of measurement for embankment payment? - Answer-The volume
of material compacted in place, accepted by the Engineer.
What is included in the payment for embankment construction? - Answer-The cost of
excavating, hauling, stockpiling, and all other costs incidental to the work.
What does the subgrade preparation consist of? - Answer-Preparation of the subgrade
for the support of overlying structural layers.
What must be completed before starting subgrade preparation? - Answer-All culverts,
cross drains, ducts, ditches, drains, and drainage outlets.
, What are the permitted variations for the finished compacted surface of the subgrade? -
Answer-+20 mm and -30 mm from the design level of surface.
What is the permitted surface irregularity measured by a 3-m straight edge? - Answer-
30 mm.
What is the permitted variation from design crossfall or camber? - Answer-±0.1%.
What is the permitted variation from design longitudinal grade over 25 m length? -
Answer-0.5%.
What must be excavated in common excavation for subgrade preparation? - Answer-All
materials below subgrade level in earth cuts to a depth of 150 mm or as directed by the
Engineer.
What is the requirement for material disposal if unsuitable? - Answer-The material shall
be disposed of in accordance with the requirements of Subsection 102.2.9.
What depth should the surface be compacted to after material removal from below
subgrade level? - Answer-The surface shall be compacted to a depth of 150 mm.
What must be done to surface irregularities under the subgrade level in rock
excavation? - Answer-They shall be leveled by placing specified material and
compacted as per Subsection 104.3.3.
What should be done to unstable material on an embankment? - Answer-It should be
removed, and low sections should be brought to grade with suitable material.
What methods can be used to shape and compact the roadbed? - Answer-Scarifying,
blading, dragging, rolling, or other necessary methods.
What is required when constructing new pavement over existing Portland Cement
concrete? - Answer-The slab must be broken into pieces no greater than 500 mm and
compacted as specified.
What is the procedure for existing asphalt concrete pavement before new pavement
construction? - Answer-The pavement shall be scarified, loosened, reshaped, and
recompacted.
What is the contractor's responsibility regarding completed work? - Answer-The
contractor must protect and maintain the work in good condition until completion.
What equipment is required for compaction? - Answer-Compaction equipment must be
capable of meeting compaction requirements without damaging the material.
