AZ A General Engineering Contractor
Exam Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. Which type of soil is most suitable for supporting heavy foundation
loads?
A. Sandy soil
B. Clay soil
C. Bedrock
D. Peat
Answer: C. Bedrock
Rationale: Bedrock provides the highest bearing capacity and
stability for heavy structures compared to loose or compressible soils.
2. What is the primary purpose of a retaining wall?
A. Support a building’s roof
B. Act as a decorative feature
C. Prevent soil erosion and lateral movement
D. Increase drainage speed
Answer: C. Prevent soil erosion and lateral movement
Rationale: Retaining walls stabilize slopes and prevent soil from
moving laterally, protecting structures and landscapes.
3. In civil engineering, what does “shear strength” of soil refer to?
A. Ability to absorb water
B. Resistance to vertical pressure
C. Resistance to sliding along a plane
D. Electrical conductivity
Answer: C. Resistance to sliding along a plane
, Rationale: Shear strength measures the soil’s ability to resist forces
that cause sliding or failure along a plane.
4. Which method is commonly used to compact soil on construction sites?
A. Spraying water
B. Excavating
C. Mechanical compaction using rollers
D. Piling
Answer: C. Mechanical compaction using rollers
Rationale: Compaction increases soil density and stability, commonly
achieved with mechanical rollers.
5. What is the primary function of a stormwater drainage system?
A. Store water for irrigation
B. Remove excess rainwater to prevent flooding
C. Supply water to buildings
D. Reduce soil acidity
Answer: B. Remove excess rainwater to prevent flooding
Rationale: Proper drainage prevents erosion, flooding, and damage
to infrastructure.
6. Which type of bridge is best suited for long spans over wide rivers?
A. Beam bridge
B. Arch bridge
C. Suspension bridge
D. Truss bridge
Answer: C. Suspension bridge
Rationale: Suspension bridges efficiently distribute weight and can
span long distances where supports are limited.
7. When constructing a road, what is the purpose of a sub-base layer?
A. Provide surface texture
B. Act as a decorative layer
C. Distribute loads and improve stability
D. Reduce water runoff
Answer: C. Distribute loads and improve stability
Rationale: The sub-base transfers traffic loads to the subgrade and
prevents deformation.
8. Which material is most commonly used for high-pressure water
pipelines in engineering projects?
A. PVC
, B. Ductile iron
C. Wood
D. Aluminum
Answer: B. Ductile iron
Rationale: Ductile iron is strong, durable, and suitable for high-
pressure water systems.
9. What is the standard slope for wheelchair ramps according to
accessibility codes?
A. 1:6
B. 1:8
C. 1:12
D. 1:15
Answer: C. 1:12
Rationale: A 1:12 slope ensures safe and accessible ramp use for
wheelchairs.
10. In concrete design, what is the main role of aggregates?
A. Reduce curing time
B. Improve color
C. Provide volume and strength
D. Increase chemical resistance
Answer: C. Provide volume and strength
Rationale: Aggregates form the bulk of concrete and contribute to its
compressive strength.
11. Which testing method determines the compaction of soil?
A. pH testing
B. Proctor test
C. Electrical resistivity
D. Permeability test
Answer: B. Proctor test
Rationale: The Proctor test measures the optimum moisture content
for achieving maximum soil density.
12. Which of the following is a common cause of structural
settlement?
A. Proper compaction
B. Poor soil bearing capacity
C. Adequate drainage
D. Quality concrete
Exam Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. Which type of soil is most suitable for supporting heavy foundation
loads?
A. Sandy soil
B. Clay soil
C. Bedrock
D. Peat
Answer: C. Bedrock
Rationale: Bedrock provides the highest bearing capacity and
stability for heavy structures compared to loose or compressible soils.
2. What is the primary purpose of a retaining wall?
A. Support a building’s roof
B. Act as a decorative feature
C. Prevent soil erosion and lateral movement
D. Increase drainage speed
Answer: C. Prevent soil erosion and lateral movement
Rationale: Retaining walls stabilize slopes and prevent soil from
moving laterally, protecting structures and landscapes.
3. In civil engineering, what does “shear strength” of soil refer to?
A. Ability to absorb water
B. Resistance to vertical pressure
C. Resistance to sliding along a plane
D. Electrical conductivity
Answer: C. Resistance to sliding along a plane
, Rationale: Shear strength measures the soil’s ability to resist forces
that cause sliding or failure along a plane.
4. Which method is commonly used to compact soil on construction sites?
A. Spraying water
B. Excavating
C. Mechanical compaction using rollers
D. Piling
Answer: C. Mechanical compaction using rollers
Rationale: Compaction increases soil density and stability, commonly
achieved with mechanical rollers.
5. What is the primary function of a stormwater drainage system?
A. Store water for irrigation
B. Remove excess rainwater to prevent flooding
C. Supply water to buildings
D. Reduce soil acidity
Answer: B. Remove excess rainwater to prevent flooding
Rationale: Proper drainage prevents erosion, flooding, and damage
to infrastructure.
6. Which type of bridge is best suited for long spans over wide rivers?
A. Beam bridge
B. Arch bridge
C. Suspension bridge
D. Truss bridge
Answer: C. Suspension bridge
Rationale: Suspension bridges efficiently distribute weight and can
span long distances where supports are limited.
7. When constructing a road, what is the purpose of a sub-base layer?
A. Provide surface texture
B. Act as a decorative layer
C. Distribute loads and improve stability
D. Reduce water runoff
Answer: C. Distribute loads and improve stability
Rationale: The sub-base transfers traffic loads to the subgrade and
prevents deformation.
8. Which material is most commonly used for high-pressure water
pipelines in engineering projects?
A. PVC
, B. Ductile iron
C. Wood
D. Aluminum
Answer: B. Ductile iron
Rationale: Ductile iron is strong, durable, and suitable for high-
pressure water systems.
9. What is the standard slope for wheelchair ramps according to
accessibility codes?
A. 1:6
B. 1:8
C. 1:12
D. 1:15
Answer: C. 1:12
Rationale: A 1:12 slope ensures safe and accessible ramp use for
wheelchairs.
10. In concrete design, what is the main role of aggregates?
A. Reduce curing time
B. Improve color
C. Provide volume and strength
D. Increase chemical resistance
Answer: C. Provide volume and strength
Rationale: Aggregates form the bulk of concrete and contribute to its
compressive strength.
11. Which testing method determines the compaction of soil?
A. pH testing
B. Proctor test
C. Electrical resistivity
D. Permeability test
Answer: B. Proctor test
Rationale: The Proctor test measures the optimum moisture content
for achieving maximum soil density.
12. Which of the following is a common cause of structural
settlement?
A. Proper compaction
B. Poor soil bearing capacity
C. Adequate drainage
D. Quality concrete
