CRC Materials & Equipment Knowledge 5

Question 1

What does the term 'engineered lumber' refer to in residential framing?

Accepted Answer

Composite wood products manufactured using adhesives and wood fibers or veneers

Answer

Lumber that has been kiln-dried and graded by a structural engineer

Answer

Lumber pre-cut to exact lengths at a factory for a specific project

Answer

Green lumber harvested and used immediately without drying

Question 2

What is the function of a drip edge installed at the eave of a roof?

Accepted Answer

To direct water away from the fascia and into the gutter

Answer

To add decorative trim at the roof edge

Answer

To secure the first course of shingles

Answer

To provide ventilation at the soffit

Question 3

Which ASTM standard specifies requirements for hollow concrete masonry units used in residential construction?

Accepted Answer

ASTM C90

Answer

ASTM C270

Answer

ASTM C150

Answer

ASTM C387

Question 4

A contractor notices that OSB roof sheathing has 'edge clips' (H-clips) specified in the plans. What is their primary purpose?

Accepted Answer

To provide edge support and maintain panel spacing at unsupported edges

Answer

To connect OSB panels to each other for waterproofing

Answer

To fasten panels to the ridge beam

Answer

To prevent panels from sliding during installation

Question 5

What is the standard width of a residential electrical service entrance conductors' clearance above a rooftop when the roof slope is less than 4:12?

Accepted Answer

8 feet

Answer

6 feet

Answer

10 feet

Answer

18 feet

Question 6

Which type of window frame material provides the lowest thermal conductivity and best energy performance in cold climates?

Accepted Answer

Vinyl or fiberglass

Answer

Aluminum

Answer

Steel

Answer

Wood clad with aluminum exterior

Question 7

What is the purpose of 'weep holes' in a brick veneer wall?

Accepted Answer

To drain water that collects at the base of the cavity and prevent moisture buildup

Answer

To allow air circulation inside the brick cavity to dry the framing

Answer

To reduce wind pressure on the veneer during storms

Answer

To provide access points for insulation installation