Wood Destroying Organism (WDO) Home Inspection Practice Exam

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Prepare for the Wood Destroying Organism (WDO) Home Inspection Exam with comprehensive study materials and quizzes. Assess your knowledge on key topics through engaging practice questions and valuable hints. Gain the confidence needed to succeed in your WDO inspection journey!

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What type of rot is associated with fungi that attack cellulose and also lignin?

Brown rot
Wet rot
Soft rot
White rot

The correct answer is: White rot

The type of rot associated with fungi that attack both cellulose and lignin is white rot. White rot is caused by a specific group of fungi known as white rot fungi which possess the unique ability to decompose both of these critical components of wood. This decomposition process leads to significant loss of strength in the wood, as it breaks down its structural integrity. Unlike brown rot fungi, which primarily degrade cellulose and leave behind lignin (resulting in a brownish coloration of the wood), white rot fungi completely digest both cellulose and lignin. As a result, the wood may appear lighter in color and spongy, and it can often take on a whitish appearance due to the breakdown of lignin. Understanding the characteristics of white rot is crucial for assessing wood damage during home inspections, as this type of rot can severely compromise the structural integrity of wooden elements in a home.