Question 110

Asbestos was commonly used as insulation in construction because it is fire resistant.

Asbestos is known for its excellent fire-resistant properties, which made it a popular choice for insulation in buildings prior to its classification as a health hazard.

A) fire resistant.

This option is correct because asbestos has a high resistance to heat and fire, which is why it was widely used in insulation materials to protect structures from fire damage. Its ability to withstand high temperatures contributed significantly to its initial popularity in construction.

B) water resistant.

While asbestos does have some degree of water resistance, this property was not the primary reason for its use in insulation. Water resistance is not a significant factor compared to its fire-resistant capabilities, making this option incorrect in the context of why it was commonly chosen.

C) an air purifier.

This option is incorrect as asbestos does not purify air. In fact, asbestos fibers can become airborne and pose serious health risks when inhaled. Thus, describing asbestos as an air purifier is misleading and incorrect.

D) repellent to common pests.

Asbestos does not have pest-repellent properties and was not used for this purpose. This option is incorrect as it misrepresents the material's intended use in construction, which was primarily for its fire resistance.

Conclusion

The correct answer, fire resistant, highlights the key characteristic that made asbestos a favored material in construction before its hazards were recognized. Other options fail to address the core reason for its widespread use, as they either misinterpret the properties of asbestos or are unrelated to its function as insulation.