CMA Construction Materials & Methods 2

Question 1

Which type of concrete admixture is used to reduce the water-cement ratio while maintaining workability?

Accepted Answer

Superplasticizer

Answer

Superplasticizers (high-range water reducers) significantly reduce water demand while maintaining or improving concrete workability.

Question 2

What is the primary purpose of a vapor retarder placed below a concrete slab-on-grade?

Accepted Answer

To limit moisture migration from soil into the slab

Answer

A vapor retarder beneath a slab-on-grade prevents ground moisture from migrating upward through the concrete, protecting floor coverings and interior conditions.

Question 3

Glulam (glued laminated timber) beams are manufactured using which bonding agent?

Accepted Answer

Phenol-resorcinol or melamine-urea formaldehyde adhesive

Answer

Glulam beams use structural adhesives such as phenol-resorcinol formaldehyde (PRF) or melamine-urea formaldehyde (MUF) to bond laminations.

Question 4

In masonry construction, what does the term 'efflorescence' describe?

Accepted Answer

White salt deposits that migrate to the surface

Answer

Efflorescence is the white crystalline deposit formed when water-soluble salts migrate to the masonry surface and crystallize upon evaporation.

Question 5

Which steel section shape provides the most efficient resistance to bending about its strong axis?

Accepted Answer

Wide-flange (W-shape) section

Answer

Wide-flange sections concentrate material in the flanges, maximizing the moment of inertia about the strong axis for efficient bending resistance.

(CMA) Certified Master Architect Practice Test

(CMA) Certified Master Architect Practice Test

CMA Construction Materials & Methods 2