FLORIDA BOARD OF PROFESSIONAL
ENGINEERS PRINCIPLES AND PRACTICE
CIVIL EXAM WITH ACTUAL QUESTIONS
AND VERIFIED ANSWERS, PLUS
EXPLAINED RATIONALES/EXPERT
VERIFIED FOR GUARANTEED 100% PASS
2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
1. Soil Mechanics — Effective Stress
A saturated soil layer has a total vertical stress of 180 kPa at a depth of
interest. The pore-water pressure at that depth is 65 kPa. What is the
effective vertical stress?
A. 65 kPa
B. 115 kPa
C. 180 kPa
D. 245 kPa
Answer: B. 115 kPa
Rationale: Effective stress is calculated as σ′ = σ − u, where σ is total
stress and u is pore-water pressure. Therefore, σ′ = 180 − 65 = 115
kPa. Effective stress controls many important soil behaviors, including
shear strength, consolidation, and settlement.
2. Geotechnical — Bearing Capacity
A shallow foundation is constructed on dense sand. The engineer
determines that the ultimate gross bearing capacity is 600 kPa. If the
1
,required factor of safety against bearing-capacity failure is 3.0, what is
the allowable gross bearing pressure?
A. 150 kPa
B. 200 kPa
C. 300 kPa
D. 1,800 kPa
Answer: B. 200 kPa
Rationale: Allowable bearing pressure is obtained by dividing ultimate
bearing capacity by the factor of safety: q_allow = 600/3 = 200 kPa.
The factor of safety provides a margin between the predicted ultimate
failure condition and the allowable working pressure.
3. Geotechnical — Consolidation
A normally consolidated clay layer experiences an increase in vertical
effective stress from 100 kPa to 200 kPa. Which statement best
describes the expected behavior?
A. No consolidation occurs because the stress increase is below the
preconsolidation stress
B. Primary consolidation is expected because the clay is normally
consolidated
C. Only immediate elastic settlement occurs
D. The clay must expand before consolidation begins
Answer: B. Primary consolidation is expected because the clay is
normally consolidated
Rationale: A normally consolidated clay has not previously
experienced an effective stress greater than its current effective
overburden stress. Increasing the effective stress therefore causes
significant primary consolidation as excess pore-water pressure
dissipates and the soil skeleton compresses.
2
,4. Geotechnical — Active Earth Pressure
A retaining wall is allowed to move sufficiently away from a
cohesionless backfill to mobilize active conditions. Which earth-
pressure condition should be used?
A. At-rest earth pressure
B. Active earth pressure
C. Passive earth pressure
D. Hydrostatic pressure only
Answer: B. Active earth pressure
Rationale: Active earth pressure develops when a retaining structure
moves sufficiently away from the soil mass to allow the soil to expand
laterally. At-rest pressure applies when movement is prevented, while
passive pressure develops when the wall moves toward the soil.
5. Geotechnical — Slope Stability
A slope has a calculated factor of safety of 0.92 against rotational
failure. What is the most appropriate engineering conclusion?
A. The slope is stable because the factor of safety is close to 1.0
B. The slope is marginally stable and requires no further analysis
C. The calculated condition indicates instability because the factor of
safety is less than 1.0
D. The factor of safety is irrelevant for slope stability
Answer: C. The calculated condition indicates instability because
the factor of safety is less than 1.0
Rationale: A factor of safety below 1.0 indicates that the available
resisting forces are less than the driving forces under the analyzed
conditions. Remedial measures, revised geometry, drainage
3
, improvements, reinforcement, or additional investigation may be
necessary.
6. Structural Mechanics — Simply Supported Beam
A simply supported beam spans 20 ft and carries a uniformly distributed
load of 2 kip/ft over its entire span. What is the maximum bending
moment?
A. 50 kip-ft
B. 75 kip-ft
C. 100 kip-ft
D. 200 kip-ft
Answer: C. 100 kip-ft
Rationale: For a simply supported beam carrying a uniform load,
M_max = wL²/8. Therefore, M_max = 2(20²)/8 = 100 kip-ft. The
maximum moment occurs at midspan.
7. Structural Mechanics — Shear
For the beam in Question 6, what is the magnitude of the reaction at
each support?
A. 10 kips
B. 20 kips
C. 30 kips
D. 40 kips
Answer: B. 20 kips
Rationale: The total distributed load is wL = 2 × 20 = 40 kips. Because
the loading and supports are symmetric, each support carries half the
total load: 40/2 = 20 kips.
4
ENGINEERS PRINCIPLES AND PRACTICE
CIVIL EXAM WITH ACTUAL QUESTIONS
AND VERIFIED ANSWERS, PLUS
EXPLAINED RATIONALES/EXPERT
VERIFIED FOR GUARANTEED 100% PASS
2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
1. Soil Mechanics — Effective Stress
A saturated soil layer has a total vertical stress of 180 kPa at a depth of
interest. The pore-water pressure at that depth is 65 kPa. What is the
effective vertical stress?
A. 65 kPa
B. 115 kPa
C. 180 kPa
D. 245 kPa
Answer: B. 115 kPa
Rationale: Effective stress is calculated as σ′ = σ − u, where σ is total
stress and u is pore-water pressure. Therefore, σ′ = 180 − 65 = 115
kPa. Effective stress controls many important soil behaviors, including
shear strength, consolidation, and settlement.
2. Geotechnical — Bearing Capacity
A shallow foundation is constructed on dense sand. The engineer
determines that the ultimate gross bearing capacity is 600 kPa. If the
1
,required factor of safety against bearing-capacity failure is 3.0, what is
the allowable gross bearing pressure?
A. 150 kPa
B. 200 kPa
C. 300 kPa
D. 1,800 kPa
Answer: B. 200 kPa
Rationale: Allowable bearing pressure is obtained by dividing ultimate
bearing capacity by the factor of safety: q_allow = 600/3 = 200 kPa.
The factor of safety provides a margin between the predicted ultimate
failure condition and the allowable working pressure.
3. Geotechnical — Consolidation
A normally consolidated clay layer experiences an increase in vertical
effective stress from 100 kPa to 200 kPa. Which statement best
describes the expected behavior?
A. No consolidation occurs because the stress increase is below the
preconsolidation stress
B. Primary consolidation is expected because the clay is normally
consolidated
C. Only immediate elastic settlement occurs
D. The clay must expand before consolidation begins
Answer: B. Primary consolidation is expected because the clay is
normally consolidated
Rationale: A normally consolidated clay has not previously
experienced an effective stress greater than its current effective
overburden stress. Increasing the effective stress therefore causes
significant primary consolidation as excess pore-water pressure
dissipates and the soil skeleton compresses.
2
,4. Geotechnical — Active Earth Pressure
A retaining wall is allowed to move sufficiently away from a
cohesionless backfill to mobilize active conditions. Which earth-
pressure condition should be used?
A. At-rest earth pressure
B. Active earth pressure
C. Passive earth pressure
D. Hydrostatic pressure only
Answer: B. Active earth pressure
Rationale: Active earth pressure develops when a retaining structure
moves sufficiently away from the soil mass to allow the soil to expand
laterally. At-rest pressure applies when movement is prevented, while
passive pressure develops when the wall moves toward the soil.
5. Geotechnical — Slope Stability
A slope has a calculated factor of safety of 0.92 against rotational
failure. What is the most appropriate engineering conclusion?
A. The slope is stable because the factor of safety is close to 1.0
B. The slope is marginally stable and requires no further analysis
C. The calculated condition indicates instability because the factor of
safety is less than 1.0
D. The factor of safety is irrelevant for slope stability
Answer: C. The calculated condition indicates instability because
the factor of safety is less than 1.0
Rationale: A factor of safety below 1.0 indicates that the available
resisting forces are less than the driving forces under the analyzed
conditions. Remedial measures, revised geometry, drainage
3
, improvements, reinforcement, or additional investigation may be
necessary.
6. Structural Mechanics — Simply Supported Beam
A simply supported beam spans 20 ft and carries a uniformly distributed
load of 2 kip/ft over its entire span. What is the maximum bending
moment?
A. 50 kip-ft
B. 75 kip-ft
C. 100 kip-ft
D. 200 kip-ft
Answer: C. 100 kip-ft
Rationale: For a simply supported beam carrying a uniform load,
M_max = wL²/8. Therefore, M_max = 2(20²)/8 = 100 kip-ft. The
maximum moment occurs at midspan.
7. Structural Mechanics — Shear
For the beam in Question 6, what is the magnitude of the reaction at
each support?
A. 10 kips
B. 20 kips
C. 30 kips
D. 40 kips
Answer: B. 20 kips
Rationale: The total distributed load is wL = 2 × 20 = 40 kips. Because
the loading and supports are symmetric, each support carries half the
total load: 40/2 = 20 kips.
4
