CBI Maintenance Protocols 2

Question 1

How often should a standard 1-inch pleated HVAC filter in a typical residence generally be replaced?

Accepted Answer

Every 1–3 months

Answer

Most manufacturers recommend replacing 1-inch pleated filters every 1–3 months, depending on occupancy, pets, and dust levels.

Question 2

According to NFPA 72, residential smoke alarms should be replaced at what maximum age?

Accepted Answer

10 years from manufacture

Answer

NFPA 72 requires smoke alarms to be replaced no more than 10 years from the manufacture date printed on the unit.

Question 3

What is the main reason for periodically flushing a tank-type water heater?

Accepted Answer

To remove accumulated sediment from the tank bottom

Answer

Annual flushing removes mineral sediment that reduces efficiency, causes rumbling noises, and shortens tank life.

Question 4

What is the generally recommended minimum frequency for cleaning residential gutters?

Accepted Answer

Twice a year, typically spring and fall

Answer

Gutters should be cleaned at least twice yearly, and more often near trees, so water drains away from the structure.

Question 5

How often should homeowners test smoke alarms using the test button?

Accepted Answer

Monthly

Answer

Smoke alarm manufacturers and NFPA recommend pressing the test button at least monthly.

CBI - Certified Building Inspector Practice Test