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Professional Engineer KAPLAN (PE) 2026
Comprehensive Exam Bank: Multiple-
Choice Questions Across All Disciplines
with Expert Rationales
SECTION I: CIVIL ENGINEERING (Questions 1–60)
The PE Civil exam consists of five divisions: Construction, Geotechnical, Structural,
Transportation, and Water Resources & Environmental. Candidates choose one division.
CONSTRUCTION DIVISION (Questions 1–12)
Question 1
Which of the following is the MOST appropriate method for compacting soil in the construction
of an embankment for a highway project?
A) Static rolling
B) Kneading compaction
C) Vibroflotation
D) Impact compaction
E) Sheepsfoot roller compaction
CorreCt Answer: E
, 2
Rationale: Sheepsfoot roller compaction is the most appropriate method for compacting
cohesive soils in embankment construction. The sheepsfoot roller provides kneading action that
effectively compacts clayey soils by rearranging particles and reducing air voids. Static rolling (A)
is suitable for granular soils. Vibroflotation (C) is used for deep compaction of granular soils.
Impact compaction (D) is used for specialized applications.
Question 2
In construction project management, the critical path is defined as the:
A) Shortest path through the project network
B) Longest path through the project network
C) Path with the most activities
D) Path with the highest cost activities
E) Path that includes all milestones
CorreCt Answer: B
Rationale: The critical path is the longest path through the project network in terms of
duration. It determines the minimum project completion time. Any delay on the critical path will
delay the entire project. Activities on the critical path have zero float (slack).
Question 3
A construction project requires 1,500 cubic yards of concrete. The concrete mix has a cement
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content of 600 lb/yd³, water-cement ratio of 0.45, and air content of 6%. The total weight of
cement required is most nearly:
A) 600,000 lb
B) 700,000 lb
C) 800,000 lb
D) 900,000 lb
E) 1,000,000 lb
CorreCt Answer: D
Rationale: Cement required = 1,500 yd³ × 600 lb/yd³ = 900,000 lb. The water-cement ratio and
air content are not needed for this calculation; they are used for mix design and quality control.
Question 4
The primary purpose of formwork in concrete construction is to:
A) Provide structural reinforcement
B) Shape and support concrete until it hardens
C) Cure the concrete
D) Improve the concrete's strength
E) Waterproof the concrete
CorreCt Answer: B
, 4
Rationale: Formwork is a temporary structure used to shape and support concrete until it gains
sufficient strength to support itself. It does not provide reinforcement (A), cure concrete (C),
improve strength (D), or provide waterproofing (E).
Question 5
A soil has a liquid limit of 45% and a plastic limit of 25%. The plasticity index is:
A) 10%
B) 15%
C) 20%
D) 25%
E) 30%
CorreCt Answer: C
Rationale: Plasticity Index (PI) = Liquid Limit − Plastic Limit = 45% − 25% = 20%. The plasticity
index indicates the range of water content over which the soil remains plastic.
Question 6
Which of the following is a key consideration for site layout and development?
A) Soil mechanics only
B) Drainage and grading
C) Material properties only
Professional Engineer KAPLAN (PE) 2026
Comprehensive Exam Bank: Multiple-
Choice Questions Across All Disciplines
with Expert Rationales
SECTION I: CIVIL ENGINEERING (Questions 1–60)
The PE Civil exam consists of five divisions: Construction, Geotechnical, Structural,
Transportation, and Water Resources & Environmental. Candidates choose one division.
CONSTRUCTION DIVISION (Questions 1–12)
Question 1
Which of the following is the MOST appropriate method for compacting soil in the construction
of an embankment for a highway project?
A) Static rolling
B) Kneading compaction
C) Vibroflotation
D) Impact compaction
E) Sheepsfoot roller compaction
CorreCt Answer: E
, 2
Rationale: Sheepsfoot roller compaction is the most appropriate method for compacting
cohesive soils in embankment construction. The sheepsfoot roller provides kneading action that
effectively compacts clayey soils by rearranging particles and reducing air voids. Static rolling (A)
is suitable for granular soils. Vibroflotation (C) is used for deep compaction of granular soils.
Impact compaction (D) is used for specialized applications.
Question 2
In construction project management, the critical path is defined as the:
A) Shortest path through the project network
B) Longest path through the project network
C) Path with the most activities
D) Path with the highest cost activities
E) Path that includes all milestones
CorreCt Answer: B
Rationale: The critical path is the longest path through the project network in terms of
duration. It determines the minimum project completion time. Any delay on the critical path will
delay the entire project. Activities on the critical path have zero float (slack).
Question 3
A construction project requires 1,500 cubic yards of concrete. The concrete mix has a cement
, 3
content of 600 lb/yd³, water-cement ratio of 0.45, and air content of 6%. The total weight of
cement required is most nearly:
A) 600,000 lb
B) 700,000 lb
C) 800,000 lb
D) 900,000 lb
E) 1,000,000 lb
CorreCt Answer: D
Rationale: Cement required = 1,500 yd³ × 600 lb/yd³ = 900,000 lb. The water-cement ratio and
air content are not needed for this calculation; they are used for mix design and quality control.
Question 4
The primary purpose of formwork in concrete construction is to:
A) Provide structural reinforcement
B) Shape and support concrete until it hardens
C) Cure the concrete
D) Improve the concrete's strength
E) Waterproof the concrete
CorreCt Answer: B
, 4
Rationale: Formwork is a temporary structure used to shape and support concrete until it gains
sufficient strength to support itself. It does not provide reinforcement (A), cure concrete (C),
improve strength (D), or provide waterproofing (E).
Question 5
A soil has a liquid limit of 45% and a plastic limit of 25%. The plasticity index is:
A) 10%
B) 15%
C) 20%
D) 25%
E) 30%
CorreCt Answer: C
Rationale: Plasticity Index (PI) = Liquid Limit − Plastic Limit = 45% − 25% = 20%. The plasticity
index indicates the range of water content over which the soil remains plastic.
Question 6
Which of the following is a key consideration for site layout and development?
A) Soil mechanics only
B) Drainage and grading
C) Material properties only
