Building Engineering Building Civil Engineering 5

Question 1

What is the purpose of 'camber' built into a steel beam before installation?

Accepted Answer

Offset anticipated dead-load deflection so the beam remains level in service

Answer

Camber is a slight upward pre-bend applied to a steel beam so that dead load deflection brings it back to a level position.

Question 2

According to the ACI 318 building code, what is the minimum specified compressive strength (f'c) commonly used for structural concrete?

Accepted Answer

3,000 psi

Answer

ACI 318 sets 3,000 psi as the general minimum f'c for structural concrete in buildings, though higher strengths are common in practice.

Question 3

What is 'consolidation settlement' in fine-grained soils?

Accepted Answer

Time-dependent settlement as excess pore water pressure dissipates under sustained load

Answer

Consolidation settlement occurs as excess pore water slowly drains from clay or silt, allowing the soil skeleton to compress over time.

Question 4

Which type of structural diaphragm transfers lateral loads to vertical elements by acting as a horizontal plate?

Accepted Answer

Floor or roof diaphragm

Answer

A floor or roof diaphragm acts like a horizontal plate that collects and transfers lateral loads to shear walls or frames below.

Question 5

What does 'LRFD' stand for in structural engineering design?

Accepted Answer

Load and Resistance Factor Design

Answer

LRFD stands for Load and Resistance Factor Design, a probabilistic design approach that applies separate factors to loads and to material resistance.

Building Engineering Practice Test