PE Structural Engineering Examination –
Lateral Forces Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
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1. In the seismic design of a building, the primary purpose of determining
the design base shear is to:
A. Calculate footing settlement
B. Establish the total lateral seismic force acting on the structure
C. Determine dead load reduction factors
D. Compute concrete shrinkage effects
B. Establish the total lateral seismic force acting on the structure
Rationale: The design base shear represents the total horizontal seismic
force used in structural analysis and design. It forms the basis for
distributing seismic forces throughout the height of the structure.
2. Which lateral load-resisting system primarily relies on beam-to-column
moment connections to resist seismic forces?
A. Braced frame
B. Bearing wall system
,C. Moment-resisting frame
D. Shear wall system
C. Moment-resisting frame
Rationale: Moment-resisting frames develop resistance through rigid
beam-column connections that transfer moments and shear forces,
providing lateral stiffness and ductility.
3. The fundamental period of a structure generally increases when:
A. Structural stiffness increases
B. Building height decreases
C. Structural mass decreases
D. Structural stiffness decreases
D. Structural stiffness decreases
Rationale: The natural period is directly related to mass and inversely
related to stiffness. Reduced stiffness results in longer vibration periods.
4. In wind engineering, the gust effect factor accounts for:
A. Concrete creep
B. Dynamic amplification caused by wind fluctuations
C. Snow drifting
D. Thermal expansion
B. Dynamic amplification caused by wind fluctuations
Rationale: Wind speeds fluctuate over time, causing dynamic structural
responses. The gust effect factor adjusts wind loads to account for these
effects.
5. Which seismic design parameter reflects the expected inelastic energy
dissipation capacity of a structural system?
,A. Importance factor
B. Site coefficient
C. Response modification coefficient (R)
D. Exposure category
C. Response modification coefficient (R)
Rationale: The response modification coefficient reduces elastic seismic
forces to design levels based on a system's anticipated ductility and energy
dissipation characteristics.
6. The overturning moment in a building subjected to lateral loads is
greatest:
A. At the roof level
B. At mid-height
C. At the base of the structure
D. At the center of rigidity
C. At the base of the structure
Rationale: Overturning moment accumulates from the lateral forces acting
above a given level and reaches its maximum value at the base.
7. A soft-story irregularity exists when:
A. Adjacent buildings are connected
B. One story has significantly lower stiffness than stories above
C. Wind speed exceeds code limits
D. Roof slope exceeds 4:12
B. One story has significantly lower stiffness than stories above
Rationale: Soft-story conditions concentrate drift demands in one level,
increasing seismic vulnerability and the risk of structural damage.
8. Torsional irregularity in a building is primarily caused by:
, A. Uniform mass distribution
B. Coincident centers of mass and rigidity
C. Eccentricity between centers of mass and rigidity
D. Increased roof live load
C. Eccentricity between centers of mass and rigidity
Rationale: When the center of mass and center of rigidity do not align,
lateral forces induce rotational responses in addition to translational
motion.
9. The equivalent lateral force procedure is generally most suitable for:
A. Highly irregular tall structures
B. Simple regular buildings within code limitations
C. Cable-supported roofs
D. Offshore platforms
B. Simple regular buildings within code limitations
Rationale: The equivalent lateral force procedure provides simplified
seismic analysis suitable for regular structures meeting specified code
criteria.
10. Which component of wind pressure acts parallel to the building
surface?
A. Impact pressure
B. Suction pressure
C. Frictional force
D. Stagnation pressure
C. Frictional force
Rationale: Frictional forces result from airflow moving parallel to surfaces
and are generally much smaller than normal wind pressures.
Lateral Forces Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
Download Pdf
1. In the seismic design of a building, the primary purpose of determining
the design base shear is to:
A. Calculate footing settlement
B. Establish the total lateral seismic force acting on the structure
C. Determine dead load reduction factors
D. Compute concrete shrinkage effects
B. Establish the total lateral seismic force acting on the structure
Rationale: The design base shear represents the total horizontal seismic
force used in structural analysis and design. It forms the basis for
distributing seismic forces throughout the height of the structure.
2. Which lateral load-resisting system primarily relies on beam-to-column
moment connections to resist seismic forces?
A. Braced frame
B. Bearing wall system
,C. Moment-resisting frame
D. Shear wall system
C. Moment-resisting frame
Rationale: Moment-resisting frames develop resistance through rigid
beam-column connections that transfer moments and shear forces,
providing lateral stiffness and ductility.
3. The fundamental period of a structure generally increases when:
A. Structural stiffness increases
B. Building height decreases
C. Structural mass decreases
D. Structural stiffness decreases
D. Structural stiffness decreases
Rationale: The natural period is directly related to mass and inversely
related to stiffness. Reduced stiffness results in longer vibration periods.
4. In wind engineering, the gust effect factor accounts for:
A. Concrete creep
B. Dynamic amplification caused by wind fluctuations
C. Snow drifting
D. Thermal expansion
B. Dynamic amplification caused by wind fluctuations
Rationale: Wind speeds fluctuate over time, causing dynamic structural
responses. The gust effect factor adjusts wind loads to account for these
effects.
5. Which seismic design parameter reflects the expected inelastic energy
dissipation capacity of a structural system?
,A. Importance factor
B. Site coefficient
C. Response modification coefficient (R)
D. Exposure category
C. Response modification coefficient (R)
Rationale: The response modification coefficient reduces elastic seismic
forces to design levels based on a system's anticipated ductility and energy
dissipation characteristics.
6. The overturning moment in a building subjected to lateral loads is
greatest:
A. At the roof level
B. At mid-height
C. At the base of the structure
D. At the center of rigidity
C. At the base of the structure
Rationale: Overturning moment accumulates from the lateral forces acting
above a given level and reaches its maximum value at the base.
7. A soft-story irregularity exists when:
A. Adjacent buildings are connected
B. One story has significantly lower stiffness than stories above
C. Wind speed exceeds code limits
D. Roof slope exceeds 4:12
B. One story has significantly lower stiffness than stories above
Rationale: Soft-story conditions concentrate drift demands in one level,
increasing seismic vulnerability and the risk of structural damage.
8. Torsional irregularity in a building is primarily caused by:
, A. Uniform mass distribution
B. Coincident centers of mass and rigidity
C. Eccentricity between centers of mass and rigidity
D. Increased roof live load
C. Eccentricity between centers of mass and rigidity
Rationale: When the center of mass and center of rigidity do not align,
lateral forces induce rotational responses in addition to translational
motion.
9. The equivalent lateral force procedure is generally most suitable for:
A. Highly irregular tall structures
B. Simple regular buildings within code limitations
C. Cable-supported roofs
D. Offshore platforms
B. Simple regular buildings within code limitations
Rationale: The equivalent lateral force procedure provides simplified
seismic analysis suitable for regular structures meeting specified code
criteria.
10. Which component of wind pressure acts parallel to the building
surface?
A. Impact pressure
B. Suction pressure
C. Frictional force
D. Stagnation pressure
C. Frictional force
Rationale: Frictional forces result from airflow moving parallel to surfaces
and are generally much smaller than normal wind pressures.
