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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Insulation installed in concealed spaces must have a flame spread index and smoke developed index not to exceed what values?

25, 500
25, 450
50, 400
50, 450

The correct answer is: 25, 450

In Massachusetts, the requirement for insulation installed in concealed spaces focuses on fire safety measures to minimize the risk of fire expansion and smoke generation. The flame spread index indicates how quickly flame can spread across the material's surface, while the smoke developed index measures the smoke emitted when the material burns. According to the Massachusetts State Building Code, materials that are to be installed in concealed spaces must have a flame spread index not exceeding 25 and a smoke developed index not exceeding 450. These values are established to ensure that insulation materials provide adequate protection and do not contribute to rapid fire growth or excessive smoke in the event of a fire. The flame spread index of 25 means that materials will burn slowly and not propagate flames aggressively, which is crucial in spaces where fires could spread before being detected. The smoke developed index of 450 is designed to limit smoke production, allowing for better visibility and possibly more escape time for occupants in a fire situation. By adhering to these standards, constructions can achieve a higher level of fire safety, which is essential for protecting lives and property.