Installation Exam Questions And

CA D73 Structural Wood Panel Installation Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• What is the most common thickness for plywood used in floor

sheathing?

• 1/4 inch
• 1/2 inch
• 3/4 inch
• 1 inch

Rationale: Floor sheathing typically requires 3/4-inch plywood to

provide adequate strength and prevent deflection under load.

• When installing structural wood panels, what is the recommended

spacing for nails along panel edges?

• 4 inches
• 6 inches
• 8 inches
• 12 inches

Rationale: Nails along panel edges should be spaced 6 inches apart to

ensure proper attachment and load distribution.

• What is the correct end joint spacing for plywood panels?
• Tight fit with no gap
• 1/8 inch gap
• 1/4 inch gap
• 1/2 inch gap 1 / 3

Rationale: A 1/8-inch gap allows for panel expansion due to moisture

without causing buckling.

• Which type of adhesive is commonly used in structural wood panel

installation?

• White glue
• Epoxy
• Construction adhesive
• Polyurethane glue

Rationale: Construction adhesive provides a strong bond between

panels and framing for structural applications.

• When installing panels on a floor, which direction should the panel face

grain run?

• Perpendicular to floor joists
• Parallel to floor joists
• Diagonal to floor joists
• Random direction

Rationale: Perpendicular orientation maximizes load-carrying

capacity and reduces deflection.

• Which fastener type is preferred for exterior structural panels?
• Wire nails
• Ring-shank nails
• Staples
• Screws without coating

Rationale: Ring-shank nails provide superior holding power,

especially in exterior applications.

• What is the maximum span for 3/4-inch plywood used in floor

applications with joists spaced 16 inches on center?

• 24 inches
• 32 inches
• 48 inches
• 60 inches

Rationale: 3/4-inch plywood can span up to 48 inches between

supports when used for floor sheathing.

• When installing panels on a roof, what is the typical spacing for nails

along the field of the panel?

• 4 inches
• 6 inches 2 / 3

• 8 inches
• 12 inches

Rationale: Nails in the field of roof panels are spaced 8 inches apart

for proper load distribution.

• Which panel grade is suitable for structural applications in wet

environments?

• C-D interior
• Exterior-grade plywood
• A-B interior
• Particleboard

Rationale: Exterior-grade plywood is manufactured with waterproof

adhesives, making it suitable for wet conditions.

• What is the primary purpose of using an underlayment beneath

structural panels?

• Decorative appearance
• Moisture barrier
• Reduce cost
• Increase thickness

Rationale: Underlayment protects the structural panels from moisture

intrusion, enhancing longevity.

• Which tool is most appropriate for cutting large structural wood

panels?

• Hand saw
• Jigsaw
• Circular saw
• Chisel

Rationale: Circular saws provide straight, clean cuts and are efficient

for cutting large panels.

• What is the minimum thickness of OSB used for wall sheathing?
• 1/4 inch
• 7/16 inch
• 1/2 inch
• 3/4 inch

Rationale: 7/16-inch OSB is standard for wall sheathing to provide

structural support without excessive weight.

• How should panels be staggered when installed on floors or

walls?

• / 3