Massachusetts Unrestricted Construction Supervisor License Practice Test

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Prepare for the Massachusetts Unrestricted Construction Supervisor License Test. Study with flashcards and multiple-choice questions, each accompanied by hints and explanations. Ace your exam with confidence!

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A drainage system is NOT REQUIRED for a foundation of a single-family dwelling in which of the following cases?

When installed with spread footings
When the walls are waterproofed
When the walls are damproofed
When installed on well-drained ground or sand-gravel mixture soils

The correct answer is: When installed on well-drained ground or sand-gravel mixture soils

A drainage system is not required for a foundation of a single-family dwelling when installed on well-drained ground or sand-gravel mixture soils due to the inherent characteristics of these soil types. Well-drained soils, such as sand and gravel, have a high permeability which allows water to flow through easily, reducing the likelihood of water accumulation around the foundation. Consequently, the risk of hydrostatic pressure building up against the foundation walls is minimized, making additional drainage systems unnecessary. In contrast, having spread footings, waterproofed walls, or damproofed walls may help mitigate water issues, but these features alone do not eliminate the need for drainage systems in certain conditions, especially in heavier or less permeable soil types where water could still collect. Thus, the well-drained conditions of option D are key to understanding why a drainage system can be omitted.