North Carolina Building Contractor License Practice Exam

What type of gypsum board is required for private garages separated from dwelling units and their attics?

1. 1/2 inch type X gypsum board

2. 3/4 inch type X gypsum board

3. 1 inch regular gypsum board

4. 5/8 inch type C gypsum board

The correct answer is: 1/2 inch type X gypsum board

The requirement for gypsum board in private garages that are separated from dwelling units is that it must be a specific type that provides adequate fire resistance. In this case, the appropriate choice is 1/2 inch type X gypsum board. Type X gypsum board is specifically designed for use in areas where there is a need for increased fire resistance, meeting the necessary building code requirements. This type of board contains additives that enhance its fire resistance properties, allowing it to withstand exposure to fire for a longer duration compared to regular gypsum board. In the context of private garages, building codes often require fire-rated separation between the garage and the rest of the dwelling to prevent the spread of fire in case of an incident. The use of 1/2 inch type X gypsum board meets these fire safety requirements effectively while also being economical and easier to handle during installation. The other options present thicker types of gypsum board or regular types that do not offer the same level of fire resistance as type X. Therefore, option A is the most suitable choice for ensuring safety and compliance in garage constructions according to the building codes.