DPWH Materials Engineer Exam
March 2025 Exam Questions and
Answers
What documentation should be maintained and kept updated by the materials engineer
during project implementation?
A. Minimum testing requirements
B. Materials logbook
C. Quality control handbook
D. Materials test result - Answer- Materials logbook
The actual strength of concrete in-place in an area represented by failed beam samples
can be determined by means of:
A. Slump test
B. Core test
C. Stability test
D. Extraction test - Answer- Core test
In slip-form construction, what is the slump of concrete used?
A. Not more than 3 inches
B. 3 to 4 inches
C. Almost zero
D. Any of the above - Answer- Almost zero
From the materials point-of-view, subgrade construction consists mainly of:
A. Compaction of the top layer in cuts
B. Compaction of the whole depth of material in embankments
C. Identification and treatment of unsuitable material
D. All of the above - Answer- All of the above
What penetration grade of asphaltic material is appropriate for sealing of PCCP joints?
A. 85-100
B. 120-150
C. 150-200
,D. Not exceeding 90 - Answer- 85-100
A set of three (3) beam samples representing a particular section of a concrete
pavement failed to meet the flexural strength requirement. As a materials engineer,
what would you recommend?
A. Monitor the pavement section with strength deficiency
B. Adjust payment corresponding to the strength deficiency of the beam samples
C. Conduct core test for strength determination on section represented by the failed
samples to determine the actual strength of the in-placed concrete
D. Submit new beam samples for testing - Answer- Conduct core test for strength
determination on section represented by the failed sample to determine the actual
strength of the in-placed concrete.
Where do we take additional cores when the measurement of any core taken from the
pavement is deficient in thickness by more than 25 mm?
A. At no less than 20-meter intervals parallel to the centerline in each direction from the
affected location
B. At no less than 15-meter intervals parallel to the centerline in each direction from the
affected location
C. At no less than 10-meter intervals parallel to the centerline in each direction from the
affected location
D. At no less than 5-meter intervals parallel to the centerline in each direction from the
affected location - Answer- At no less than 5-meter intervals parallel to the centerline in
each direction from the affected location.
The asphalt material that is usually classified by its penetration grade is:
A. Joint filler
B. Emulsified asphalt
C. Cutback asphalt
D. Asphalt cement - Answer- Asphalt cement
The mortar proportion of stone masonry shall be:
A. One-part cement 2-parts sand
B. One-part cement 3-parts sand
C. One-part cement 4-parts sand
D. One-part cement 1-part sand - Answer- 1. One-part cement, 2-parts sand
How many pipes should be tested for strength absorption and dimension in 300 pcs of
reinforced culvert pipe?
A. One
B. Two
, C. Four
D. Six - Answer- Six
The moisture-density curve is different for each soil. Which of the following statements
is/are true?
A. Granular well-graded soils generally have fairly high maximum densities at low
optimum moisture content (OMC)
B. Clay soils have lower densities at OMC than granular well-graded soils
C. Granular well-graded soils have higher densities than uniform soils at OMC
D. All of the above - Answer- All of the above
Embankment materials are classified as unsuitable materials if:
A. The natural moisture content is 50%
B. The liquid limit is 40%
C. The plasticity index is 60
D. The natural density is 1200 Kg per cubic meter - Answer- The plasticity index is 60
The test which combines a load-deformation test performed in the laboratory with an
empirical design chart to determine the thickness of pavement base and other layers is
known as:
A. Plate bearing test
B. Moisture-Density Determination
C. California Bearing ratio
D. Standard Penetration Test - Answer- California bearing ratio
If one of the measurements of a core specimen taken from the concrete pavement is
28.7 cm, what is the corrected measurement to be used in calculating the average
thickness of the pavement if the design thickness is 28.0 cm?
A. 28.7 cm
B. 28.0 cm
C. 28.5 cm
D. 29.0 cm - Answer- 28.5 cm
Which of the following bituminous materials is best recommended for sealing weakened
plane joints?
A. Asphalt cement
B. Emulsified Asphalt
C. Cutback Asphalt
D. Joint filler asphalt - Answer- Joint filler asphalt
March 2025 Exam Questions and
Answers
What documentation should be maintained and kept updated by the materials engineer
during project implementation?
A. Minimum testing requirements
B. Materials logbook
C. Quality control handbook
D. Materials test result - Answer- Materials logbook
The actual strength of concrete in-place in an area represented by failed beam samples
can be determined by means of:
A. Slump test
B. Core test
C. Stability test
D. Extraction test - Answer- Core test
In slip-form construction, what is the slump of concrete used?
A. Not more than 3 inches
B. 3 to 4 inches
C. Almost zero
D. Any of the above - Answer- Almost zero
From the materials point-of-view, subgrade construction consists mainly of:
A. Compaction of the top layer in cuts
B. Compaction of the whole depth of material in embankments
C. Identification and treatment of unsuitable material
D. All of the above - Answer- All of the above
What penetration grade of asphaltic material is appropriate for sealing of PCCP joints?
A. 85-100
B. 120-150
C. 150-200
,D. Not exceeding 90 - Answer- 85-100
A set of three (3) beam samples representing a particular section of a concrete
pavement failed to meet the flexural strength requirement. As a materials engineer,
what would you recommend?
A. Monitor the pavement section with strength deficiency
B. Adjust payment corresponding to the strength deficiency of the beam samples
C. Conduct core test for strength determination on section represented by the failed
samples to determine the actual strength of the in-placed concrete
D. Submit new beam samples for testing - Answer- Conduct core test for strength
determination on section represented by the failed sample to determine the actual
strength of the in-placed concrete.
Where do we take additional cores when the measurement of any core taken from the
pavement is deficient in thickness by more than 25 mm?
A. At no less than 20-meter intervals parallel to the centerline in each direction from the
affected location
B. At no less than 15-meter intervals parallel to the centerline in each direction from the
affected location
C. At no less than 10-meter intervals parallel to the centerline in each direction from the
affected location
D. At no less than 5-meter intervals parallel to the centerline in each direction from the
affected location - Answer- At no less than 5-meter intervals parallel to the centerline in
each direction from the affected location.
The asphalt material that is usually classified by its penetration grade is:
A. Joint filler
B. Emulsified asphalt
C. Cutback asphalt
D. Asphalt cement - Answer- Asphalt cement
The mortar proportion of stone masonry shall be:
A. One-part cement 2-parts sand
B. One-part cement 3-parts sand
C. One-part cement 4-parts sand
D. One-part cement 1-part sand - Answer- 1. One-part cement, 2-parts sand
How many pipes should be tested for strength absorption and dimension in 300 pcs of
reinforced culvert pipe?
A. One
B. Two
, C. Four
D. Six - Answer- Six
The moisture-density curve is different for each soil. Which of the following statements
is/are true?
A. Granular well-graded soils generally have fairly high maximum densities at low
optimum moisture content (OMC)
B. Clay soils have lower densities at OMC than granular well-graded soils
C. Granular well-graded soils have higher densities than uniform soils at OMC
D. All of the above - Answer- All of the above
Embankment materials are classified as unsuitable materials if:
A. The natural moisture content is 50%
B. The liquid limit is 40%
C. The plasticity index is 60
D. The natural density is 1200 Kg per cubic meter - Answer- The plasticity index is 60
The test which combines a load-deformation test performed in the laboratory with an
empirical design chart to determine the thickness of pavement base and other layers is
known as:
A. Plate bearing test
B. Moisture-Density Determination
C. California Bearing ratio
D. Standard Penetration Test - Answer- California bearing ratio
If one of the measurements of a core specimen taken from the concrete pavement is
28.7 cm, what is the corrected measurement to be used in calculating the average
thickness of the pavement if the design thickness is 28.0 cm?
A. 28.7 cm
B. 28.0 cm
C. 28.5 cm
D. 29.0 cm - Answer- 28.5 cm
Which of the following bituminous materials is best recommended for sealing weakened
plane joints?
A. Asphalt cement
B. Emulsified Asphalt
C. Cutback Asphalt
D. Joint filler asphalt - Answer- Joint filler asphalt
