Oregon Construction Contractors (CCB) Practice Test

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Which of the following is necessary for sealing deck penetrations properly?

Using adhesive tape
Applying waterproof paint
Sealing compounds
Natural oils

The correct answer is: Sealing compounds

Sealing deck penetrations properly is crucial to prevent water intrusion and damage to the structure. Sealing compounds are specifically designed to fill gaps and create a water-tight seal around penetrations such as pipes, vents, and fasteners. These compounds can be silicone, polyurethane, or other materials tailored for outdoor use, providing flexibility and durability against the elements. The other options, while they may have their uses, do not fulfill the specific requirement for sealing penetrations effectively. Adhesive tape might provide a temporary solution, but it is not durable enough or designed to withstand weather conditions over time. Waterproof paint can help protect surfaces but is not effective for sealing where penetrations occur, as it does not fill voids or gaps. Natural oils are generally used for wood preservation and do not provide a water-tight seal necessary for penetrations. Thus, sealing compounds are the most appropriate and effective choice for this purpose.