Structural Engineering PE Exam Flashcards

According to NCEES PE Structural exam standards, which load combination from ASCE 7 governs strength design for a building subjected to dead, live, and wind loads?

Answer: 1.2D + 1.0W + 1.0L

ASCE 7 load combination 1.2D + 1.0W + 1.0L (or +0.5S) governs when wind load is a primary variable action alongside dead and live loads.

In the NCEES PE Structural exam, what is the purpose of a moment frame in a building's lateral force-resisting system?

Answer: To resist lateral forces through bending in beams and columns

A moment frame resists lateral (wind or seismic) forces through flexural rigidity developed by moment connections between beams and columns.

For the NCEES PE Structural exam, what does the term 'effective length factor K' represent in column design?

Answer: A modifier that accounts for end conditions affecting buckling length

The effective length factor K adjusts the actual column length to an equivalent pin-ended length based on end restraint conditions for Euler buckling calculations.

On the NCEES PE Structural exam, which failure mode governs the design of a short, stocky concrete column?

Answer: Material crushing/yielding

Short columns fail by material crushing (concrete compression or steel yielding) rather than elastic buckling, which governs slender columns.

In NCEES PE Structural exam context, what is the significance of the 'plastic moment' Mp in steel beam design?

Answer: The maximum moment capacity when the full cross-section yields

The plastic moment Mp represents the theoretical maximum bending capacity achieved when the entire cross-section has yielded, forming a plastic hinge.

For the NCEES PE Structural exam, what does 'shear lag' affect in connection design of steel members?

Answer: The effective area of a member when not all elements are connected

Shear lag reduces the effective net area of a tension member when not all cross-sectional elements are directly connected, accounted for by the shear lag factor U.