CSLB Class B General Contractor's License Practice Exam

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Prepare for the CSLB Class B General Contractor's License Test with interactive flashcards and multiple choice questions. Each question offers hints and explanations to enhance your understanding and readiness for the exam.

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When do you wet a concrete block during installation?

Before the installation
Only when necessary
When it is extremely dry
At any time during the project

The correct answer is: Before the installation

Wetting a concrete block before installation is essential for several reasons. First and foremost, wetting the block helps to prevent it from absorbing too much moisture from the mortar or adhesive used for installation. If a block is too dry, it can draw moisture away from the bonding material, which may lead to poor adhesion and compromise the structural integrity of the project. In situations where blocks are excessively dry, achieving a proper bond becomes increasingly difficult, potentially resulting in cracks and decreased durability in the finished work. Wetting the blocks helps to create a balance, ensuring that the installation process proceeds smoothly while maintaining the strength of the bond. Additionally, wetting the blocks can help reduce the risk of shrinkage and cracking by minimizing the temperature differences that can occur during the curing of the mortar. It's an important step that contributes significantly to ensuring the long-term performance and stability of the masonry work.