BArch Bachelor of Architecture Building Materials & Construction Technology 2

Question 1

What does ASTM designate for standard Type I/II Portland cement, the most commonly used cement type in US construction?

Accepted Answer

ASTM C150

Answer

ASTM C150 is the standard specification for Portland cement, with Type I being general-purpose and Type II offering moderate sulfate resistance, both widely used in US construction.

Question 2

In steel construction, galvanizing protects steel from corrosion by which mechanism?

Accepted Answer

Cathodic (sacrificial) protection — zinc corrodes preferentially to protect the steel

Answer

Zinc in galvanizing is anodic to steel, meaning zinc corrodes sacrificially — it is consumed before the underlying steel, providing long-term corrosion protection.

Question 3

Which masonry unit is hollow, lightweight, and most commonly used for load-bearing and non-load-bearing walls in US commercial construction?

Accepted Answer

Concrete Masonry Unit (CMU)

Answer

CMU (concrete block) is the dominant masonry unit in US commercial construction due to its hollow cores (which reduce weight and allow reinforcing/grouting), low cost, and versatility.

Question 4

What is the primary purpose of a vapor retarder in a building assembly?

Accepted Answer

Limit moisture diffusion through the assembly to prevent condensation within the wall

Answer

A vapor retarder limits the diffusion of water vapor through a wall, ceiling, or floor assembly, preventing condensation from forming within the insulation or structure.

Question 5

In curtain wall systems, what is the function of the pressure plate and cover cap assembly?

Accepted Answer

Clamp the glazing to the mullion and provide a finished exterior surface

Answer

The pressure plate bolts to the mullion to mechanically capture the glass or panel edge, while the snap-on cover cap conceals the fasteners and provides the finished exterior appearance.

BArch Bachelor of Architecture Practice Test

BArch Bachelor of Architecture Practice Test

BArch Bachelor of Architecture Building Materials & Construction Technology 2