NOCTI Construction and Building Trades

Question 1

What is the primary purpose of a building permit?

Accepted Answer

To ensure construction meets local building codes and safety standards

Answer

A building permit is official approval from a local authority confirming that proposed construction complies with zoning laws and safety codes.

Question 2

Which type of foundation is most commonly used for residential homes in the US?

Accepted Answer

Concrete slab or poured concrete wall foundation

Answer

Residential homes most commonly use poured concrete slab or poured concrete wall (basement/crawl space) foundations due to cost and reliability.

Question 3

What does the term 'load-bearing wall' mean?

Accepted Answer

A wall that supports the weight of the structure above it

Answer

A load-bearing wall carries structural loads from floors and roofs above and transfers them down to the foundation.

Question 4

In electrical wiring, what color is typically used for the neutral wire in US residential construction?

Accepted Answer

White

Answer

In US residential wiring, white (or gray) insulation identifies the neutral conductor, which carries current back to the panel.

Question 5

What is the purpose of flashing in roofing and construction?

Accepted Answer

To prevent water infiltration at joints and transitions

Answer

Flashing is thin metal or waterproof material installed at roof joints, valleys, and penetrations to direct water away and prevent leaks.

NOCTI - National Occupational Competency Testing Institute Practice Test