CA D53 Wood Tanks Contractor Exam

CA D53 Wood Tanks Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• What is the primary advantage of using redwood for wood tank

construction?

• Low initial cost
• Natural decay resistance
• Higher density than cedar
• Requires no maintenance

Rationale: Redwood is naturally resistant to decay and insects, making it

ideal for wet environments like tanks.

• Which wood species is also commonly used for staves in wood tanks

besides redwood?

• Pine
• Oak
• Western red cedar
• Maple

Rationale: Western red cedar is lightweight, stable, and rot-resistant,

suitable for water tank staves.

• The purpose of a stave joint in a wood tank is to: 1 / 3

• Increase tank height
• Form a watertight seal
• Reduce wood shrinkage
• Anchor the foundation

Rationale: Stave joints allow the staves to fit tightly and swell to create a

watertight structure.

• What tool is used to tighten steel hoops around a wood tank?
• Torque wrench
• Pipe wrench
• Hoop stretcher
• Chain binder

Rationale: A hoop stretcher specifically tensions and sets hoops around

tank staves.

• What is the common shape for most wood tanks?
• Rectangular
• Circular
• Oval
• Triangular

Rationale: Circular design distributes pressure evenly and prevents

structural stress.

6. When filling a new wooden tank for the first time, the installer should:

• Fill it rapidly to full
• Fill slowly to allow swelling
• Add chemicals first
• Keep it empty for 48 hours

Rationale: Slow filling allows the wood to swell gradually and seal gaps

properly. 2 / 3

7. Wood tank hoops are typically made from:

• Aluminum
• Copper
• Galvanized steel
• Stainless steel only

Rationale: Galvanized steel hoops resist corrosion and provide strong

tension.

8. A common thickness range for tank staves is:

• ½–1 inch
• ⅝–1 inch
• 1½–2 inches
• 2–3 inches

Rationale: Staves must be thick enough for structural integrity and

swelling.

• What is the purpose of tank hoops?
• Support the roof
• Hold staves together under pressure
• Prevent evaporation
• Prevent wood decay

Rationale: Hoops maintain compressive force to keep the staves tight and

sealed.

10. A typical roof material for wood tanks is:

• Tin
• PVC sheet
• / 3