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 C150

Answer

ASTM C270

Answer

ASTM C387

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

To provide thermal insulation between panels

Answer

To allow differential movement between stories

Answer

To drain condensation from the glazing cavity

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 has lower compressive strength and higher flexibility

Answer

Type S is used exclusively for interior non-load-bearing partitions

Answer

Type S contains no lime and relies solely on Portland cement

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

Fully adhered single-ply

Answer

Mechanically fastened TPO

Answer

Self-adhered modified bitumen

Question 5

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

Accepted Answer

Hanger wire

Answer

Cross tee

Answer

Wall angle

Answer

Carrying channel

Question 6

What is the key advantage of using glass fiber reinforced concrete (GFRC) for architectural cladding panels?

Accepted Answer

It achieves high strength at significantly reduced panel weight

Answer

It eliminates all thermal bridging at panel connections

Answer

It is impervious to UV degradation without any coating

Answer

It requires no control joints regardless of panel size

Question 7

Which term describes the measure of a material's resistance to water vapor transmission?

Accepted Answer

Permeance

Answer

Absorptance

Answer

Emittance

Answer

Transmittance