NCCER Maintenance & Repair

Question 1

What is the most common cause of HVAC system failure?

Accepted Answer

Clogged filters and poor maintenance.

Answer

Lack of refrigerant.

Answer

Excessive refrigerant.

Answer

Broken air ducts.

Question 2

How should you maintain an air conditioning unit?

Accepted Answer

Regularly clean filters, check refrigerant, and clean coils.

Answer

Only replace the air filters.

Answer

Only check the refrigerant levels.

Answer

Just check for visible damage.

Question 3

What is the most important task when performing maintenance on plumbing systems?

Accepted Answer

Answer

Check for blockages and leaks.

Answer

Clean the sink and toilet.

Answer

Replace all fixtures.

Answer

Ensure the water pressure is low.

Question 4

How do you ensure an electrical system is functioning properly?

Accepted Answer

Inspect circuits, grounding, and connections.

Answer

Ensure the system is disconnected from the power supply.

Answer

Replace all wires.

Answer

Check for visible wear on insulation.

Question 5

What is the best way to prevent water leaks in plumbing?

Accepted Answer

Check and seal joints and replace worn washers.

Answer

Leave all joints loose for easy access.

Answer

Use larger pipes.

Answer

Install new plumbing every year.

Question 6

What is the function of an air filter in an HVAC system?

Accepted Answer

To trap dust and allergens.

Answer

To regulate temperature.

Answer

To increase airflow.

Answer

To prevent water damage.

Question 7

How often should plumbing systems be inspected for potential problems?

Accepted Answer

Every 1-2 years depending on usage.

Answer

Once every few years.

Answer

Only when there is a problem.

Answer

Once every five years.

Question 8

What should be done when a plumbing fixture is clogged?

Accepted Answer

Use a plunger or auger to clear the blockage.

Answer

Apply harsh chemicals to dissolve the clog.

Answer

Remove and replace the fixture.

Answer

Ignore the issue and wait.

Question 9

How do you maintain air ducts in HVAC systems?

Accepted Answer

Clean and inspect ducts regularly.

Answer

Use air fresheners to maintain ducts.

Answer

Paint ducts for aesthetics.

Answer

Replace ducts every few years.