ACI Adhesive Anchor Installer Certification Practice Exam

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Prepare for the ACI Adhesive Anchor Installer Certification Exam. Revise with multiple-choice questions, detailed explanations, and expert tips. Enhance your skills and ensure you're well-prepared for the certification!

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What effect can a layer of dust in the hole have on adhesive bond to the concrete?

Enhance
No effect
Reduce
Strengthen

The correct answer is: Reduce

A layer of dust in the hole can significantly reduce the adhesive bond to the concrete due to contamination of the bonding surface. For adhesive anchors to perform optimally, the surfaces must be clean and free of debris, including dust, dirt, oil, and other contaminants. Dust can create a barrier between the adhesive and the concrete, preventing the adhesive from fully penetrating the surface and achieving the necessary bond strength. This reduction in bond strength can lead to poor performance of the anchor, which could ultimately compromise the structural integrity of the installation. Therefore, ensuring that the hole is clean is essential for achieving the desired performance of adhesive anchors.