NCCER Core Construction Skills 3

Question 1

What is the minimum overlap required when lapping roofing felt (tar paper) on a residential roof?

Accepted Answer

4 inches

Answer

Roofing felt should overlap a minimum of 4 inches at horizontal seams to prevent water infiltration beneath the shingles.

Question 2

Which tool is used to measure and transfer a consistent distance parallel to an edge when laying out cabinet installation lines?

Accepted Answer

Marking gauge

Answer

A marking gauge has an adjustable fence that rides along an edge to scribe a consistent line at a set distance.

Question 3

A homeowner reports a GFI outlet that won't reset. What is the most likely cause?

Accepted Answer

A downstream fault or overload is still present

Answer

A GFCI outlet will not reset if a ground fault or wiring issue still exists on the protected circuit downstream.

Question 4

When installing ceramic floor tile, what is the purpose of back-buttering?

Accepted Answer

Applying adhesive to both the floor and the tile back for better bond

Answer

Back-buttering applies thin-set mortar to the back of the tile in addition to the floor, ensuring full contact and preventing hollow spots.

Question 5

What does 'on center' (OC) mean in framing specifications such as '16" OC'?

Accepted Answer

The distance measured from the center of one stud to the center of the next

Answer

On center (OC) spacing is measured from the center of one framing member to the center of the next adjacent member.

(NCCER) National Center for Construction Education and Research Certified Handyman Practice Test