CMI CMI Advanced Defect Analysis & Documentation 2

Question 1

A CMI identifies reversed polarity at multiple outlets throughout a home. Which component is the most likely cause?

Accepted Answer

Hot and neutral wires were swapped at the outlet, a junction box, or at the panel

Answer

Reversed polarity is almost always a wiring error at the connection point — outlet, junction box, or panel — where hot and neutral conductors were inadvertently transposed.

Question 2

What does a high static pressure drop across an HVAC air filter most likely indicate?

Accepted Answer

The filter is clogged or too restrictive, reducing airflow and stressing the blower

Answer

Excessive static pressure drop across a filter signals restriction from clogging or an overly dense filter media, which reduces airflow and can cause blower motor stress and coil icing.

Question 3

During a roof inspection, a CMI observes granule loss concentrated at the north-facing slope. What is the most likely explanation?

Accepted Answer

Prolonged moisture retention on the shaded slope accelerating granule loss and aging

Answer

North-facing slopes receive less sunlight and dry more slowly, promoting algae and moss growth that actively loosen and displace surface granules over time.

Question 4

A CMI notes that a gas water heater flue connector has a downward pitch toward the appliance. Why is this a critical safety defect?

Accepted Answer

A downward pitch traps combustion gases including carbon monoxide, preventing proper venting to the exterior

Answer

Flue connectors must pitch upward continuously toward the chimney so buoyancy drives combustion gases out; a dip allows CO and other products to back-draft into the living space.

Question 5

What does the term 'negative drainage' mean in a home inspection context?

Accepted Answer

Grading that slopes toward the foundation, directing surface water against the structure

Answer

Negative drainage describes a grade that falls toward rather than away from the foundation, channeling rainwater and snowmelt against the structure and increasing basement water intrusion risk.

CMI - Certified Master Inspector Practice Test

CMI - Certified Master Inspector Practice Test

CMI CMI Advanced Defect Analysis & Documentation 2