Building Engineering Structural Analysis and Design 3

Question 1

What is the purpose of a grade beam in foundation design?

Accepted Answer

A shallow reinforced concrete beam that connects spread footings and supports walls at grade level

Answer

A beam embedded in a concrete slab to increase its strength

Answer

A steel beam used to span over a soft soil area

Answer

A beam that transfers loads from the structure to grade beams

Question 2

What is the difference between a simply supported beam and a fixed-end beam?

Accepted Answer

A simply supported beam rotates freely at supports; a fixed-end beam is restrained against rotation

Answer

A simply supported beam carries more load than a fixed-end beam

Answer

A fixed-end beam has no bending moment at midspan

Answer

A simply supported beam cannot carry uniform distributed loads

Question 3

What is the role of the building code in structural engineering practice?

Accepted Answer

To set minimum safety standards that structural designs must meet or exceed

Answer

To prescribe the exact structural system for each building type

Answer

To guarantee that buildings will never be damaged in extreme events

Answer

To eliminate the need for engineering calculations on routine buildings

Question 4

What is the significance of the moment of inertia (I) for a structural beam?

Accepted Answer

It measures the beam's resistance to bending — higher I means less deflection

Answer

It measures the beam's weight per unit length

Answer

It determines the beam's shear capacity

Answer

It represents the beam's cross-sectional area

Question 5

What is the purpose of a bearing plate under a structural steel beam?

Accepted Answer

To distribute the concentrated beam reaction over a larger area of the supporting masonry or concrete

Answer

To prevent the beam from slipping off its support

Answer

To allow the beam to expand thermally without binding

Answer

To connect the beam rigidly to the support wall

Question 6

What structural phenomenon occurs when a slender column buckles before reaching its material yield strength?

Accepted Answer

Euler buckling (elastic buckling)

Answer

Plastic hinging

Answer

Lateral torsional buckling

Answer

Block shear failure