CCS Building Materials & Systems 2

Question 1

Which ASTM standard governs the compressive strength testing of portland cement concrete cylinders?

Accepted Answer

ASTM C39

Answer

ASTM C39 is the standard test method for compressive strength of cylindrical concrete specimens.

Question 2

A specifier requires 'Type X' gypsum board in a fire-rated assembly. What distinguishes Type X from regular gypsum board?

Accepted Answer

It contains glass fiber reinforcement and additional gypsum to slow burn-through

Answer

Type X gypsum board contains glass fibers and additional gypsum additives that slow calcination and improve fire resistance.

Question 3

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

Accepted Answer

To limit the diffusion of water vapor through the assembly and prevent interstitial condensation

Answer

Vapor retarders limit moisture vapor diffusion to prevent condensation within wall cavities.

Question 4

Structural insulated panels (SIPs) typically consist of which combination of materials?

Accepted Answer

Rigid foam insulation core bonded between two structural facing panels

Answer

SIPs are composite panels with a rigid foam core (EPS, XPS, or polyurethane) laminated between OSB or other structural facings.

Question 5

Which masonry mortar type has the highest compressive strength and is used for below-grade and heavily loaded applications?

Accepted Answer

Type M

Answer

Type M mortar has the highest compressive strength (minimum 2,500 psi) and is suited for below-grade and high-load masonry.

(CCS) Certified Construction Specifier Practice Test