National Home Inspector Practice Exam

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Prepare for the National Home Inspector Exam. Study with comprehensive multiple-choice questions, hints, and explanations. Ensure you pass on your first attempt!

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What is one function of screened metal chimney caps?

Slowing draft acceleration at the top of the flue
Preventing the escape of sparks and embers
Preventing entry of birds and other animals
Retarding rainwater penetration into the flue

The correct answer is: Slowing draft acceleration at the top of the flue

The primary function of screened metal chimney caps is to prevent the entry of birds and other animals into the chimney. By utilizing screens, these caps effectively block access points that could otherwise be used by wildlife, thereby protecting the chimney's interior from nesting and possible obstruction issues that could arise from such intrusions. While slowing draft acceleration, controlling moisture, and preventing sparks are also factors considered in chimney cap design, the key role of screening, specifically in preventing animals from entering, is crucial for maintaining the functionality and safety of the chimney system.