NCCER Case Analysis & Practical Application 3

Question 1

You are asked to install a ceiling fan where only a standard light fixture box exists. The box is rated for 35 lbs. The fan weighs 28 lbs. What is the correct action?

Accepted Answer

Replace the box with a fan-rated brace bar assembly before installation

Answer

Ceiling fans require fan-rated boxes because of dynamic load and vibration; a standard light box rated for weight alone is not approved for fan use.

Question 2

A customer reports intermittent flickering of lights throughout the house, not just on one circuit. What is the most likely cause?

Accepted Answer

A loose neutral connection at the main panel or utility connection

Answer

Whole-house intermittent flickering typically points to a loose main neutral, which can cause voltage fluctuations across all circuits.

Question 3

While caulking the joint between a bathtub and tile wall, you notice the existing caulk has black mold underneath. What is the correct remediation sequence?

Accepted Answer

Remove all old caulk, treat with mold-killing solution, allow to fully dry, then re-caulk

Answer

Removing all old caulk, killing existing mold spores, and ensuring complete dryness before re-caulking prevents mold from growing under the new application.

Question 4

A homeowner wants to convert a 3-prong dryer outlet (NEMA 10-30) to a 4-prong outlet (NEMA 14-30) for a new dryer. What does this conversion require?

Accepted Answer

Running a new 4-wire cable (two hots, neutral, and ground) from the panel to the outlet

Answer

A NEMA 14-30 requires a separate equipment ground wire; the old 3-wire circuit lacks this, so new 4-wire cable must be run from the panel.

Question 5

You discover that a toilet is rocking slightly and has a soft floor around the base. What is the most important first step?

Accepted Answer

Turn off the water supply and inspect for subfloor damage before any other repair

Answer

A soft floor around a rocking toilet suggests subfloor water damage that must be assessed before making any repairs, since the scope of work may be much larger.

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

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

NCCER Case Analysis & Practical Application 3