Massachusetts Construction Supervisor License (CSL) Practice Test

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Enhance your knowledge for the Massachusetts Construction Supervisor License Test with our comprehensive quiz. Dive into key construction topics and improve your preparation for success!

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What is the minimum required thickness of a mortar joint in a masonry unit wall in a dwelling?

1/4 inch
3/8 inch
1/2 inch
5/8 inch

The correct answer is: 3/8 inch

The minimum required thickness of a mortar joint in a masonry unit wall in a dwelling is 3/8 inch. This standard is specified in building codes to ensure structural integrity and proper adhesion between masonry units. A thickness of 3/8 inch allows for slight variations in the size of the masonry units, facilitating a good bond while also providing enough space for effective joint filling and water drainage. Using this thickness also helps to reduce the risk of excessive cracking and ensures a more uniform appearance in the finished product. Thicker joints can sometimes lead to problems with alignment and stability, while thinner joints may not provide adequate support or bond strength. Adhering to the 3/8 inch standard helps to meet engineering requirements and promotes durability in masonry construction.