Electrical

The minimum thickness of masonry fireplace hearths shall be ___ inches.

• 6

• 7

• 2

• 4

For a masonry fireplace opening that is less than 6 square feet, what are the minimum dimensions for the hearth extensions to extend?

(Front extension X each side extension)

• 16 in X 8 in

• 12 in X 6 in

• 18 in X 9 in

• 20 in X 10 in

What should the dimensions of the hearth extension be for a masonry fireplace opening that is 6 square feet or larger?

(front extension X each side extension)

• 18 in X 10 in

• 24 in X 12 in

• 16 in X 8 in

• 20 in X 12 in

Wood beams, joists, studs, and other combustible material shall hace a clearance of not less than ___ inches from the front faces and sides of masonry fireplaces.

Combustible material within ___ inches of the fireplace opening shall not project more than 18 inch for each 1-inch distance from such an opening.

Chapter 11 regulates the ___ efficiency for the design and construction of buildings regulated by the IRC.

For mechanical systems, a level working space not less than ___ inches deep and ___ inches wide shall be provided in front of the control side to service an appliance.

• 25 inches deep and 25 inches wide

• 30 inches deep and 30 inches wide

• 65 inches deep and 65 inches wide

• 40 inches deep and 40 inches wide

What is the minimum dimensions of an opening and clear, unobstructed passageway for attics containing appliances?

Input answer as Height X Width X Length

Attics containing mechanical appliances shall be provided with an opening and a clear and unobstructed passageway large enough to allow removal of the ___ appliance.

Mechanical appliances installed in attics shall have a luminaire controlled by a switch located at the required ___ ___ and a receptacle outlet shall be installed at or near the appliance location.