CMA Construction Materials & Methods 3

Question 1

What distinguishes Type X gypsum wallboard from standard Type W (regular) wallboard?

Accepted Answer

Addition of glass fibers and other non-combustible aggregates for enhanced fire resistance

Answer

Type X wallboard contains glass fibers and special aggregates in the gypsum core that slow calcination and maintain integrity under fire exposure longer than regular board.

Question 2

In steel frame construction, what is the function of a 'shear tab' (single-plate shear connection)?

Accepted Answer

Transfers vertical shear while allowing beam-end rotation

Answer

A shear tab is a simple framing connection that transfers vertical shear load while allowing the beam end to rotate freely, making it a 'pinned' connection.

Question 3

What is 'tilt-up' concrete construction?

Accepted Answer

Concrete wall panels cast horizontally on the slab and then tilted into vertical position

Answer

Tilt-up construction involves casting large concrete panels flat on the floor slab and then tilting them upright with a crane to form the building walls.

Question 4

Which fastener is specifically designed to connect wood ledgers to concrete or masonry walls in seismic zones?

Accepted Answer

Code-listed ledger connector with shear and tension values

Answer

In seismic zones, IBC and AWC require tested, listed ledger connectors with published shear and withdrawal values; standard lag bolts lack the required testing documentation.

Question 5

What is the water-cement (w/c) ratio's primary effect on hardened concrete?

Accepted Answer

Lower w/c ratios increase compressive strength and reduce permeability

Answer

Reducing the water-cement ratio produces a denser cement paste with higher compressive strength, lower permeability, and improved durability.

(CMA) Certified Master Architect Practice Test

(CMA) Certified Master Architect Practice Test

CMA Construction Materials & Methods 3