CSI Construction Materials & Systems 2

Question 1

Which ASTM standard governs the testing of compressive strength for hydraulic cement mortars?

Accepted Answer

ASTM C109

Answer

ASTM C109 covers the standard test method for compressive strength of hydraulic cement mortars using 2-inch cube specimens.

Question 2

In curtain wall systems, what is the primary function of a pressure plate?

Accepted Answer

To clamp the glazing or infill panel to the framing member

Answer

Pressure plates mechanically clamp glazing or infill panels against a structural gasket on the curtain wall framing, securing them in place.

Question 3

What distinguishes Type S mortar from Type N mortar per ASTM C270?

Accepted Answer

Type S has higher compressive strength and is used where high lateral loads occur

Answer

Type S mortar has a minimum compressive strength of 1,800 psi and is used where high lateral loads from wind or seismic forces must be resisted.

Question 4

Which roofing membrane system relies on the weight of ballast rather than mechanical fasteners or adhesive to remain in place?

Accepted Answer

Loose-laid ballasted EPDM

Answer

Loose-laid ballasted EPDM systems are held down by gravel or pavers placed on top of the membrane rather than by fasteners or adhesive.

Question 5

In a suspended acoustical ceiling system, what component directly supports the main runner?

Accepted Answer

Hanger wire

Answer

Hanger wires attach to the structure above and support the main runners (carrying tees) of a suspended acoustical ceiling grid.

(CSI) Construction Specifications Institute Certification Practice Test