RMS RMS Quality & Compliance 3

Question 1

Which type of fan failure would most directly cause a radon mitigation system to stop functioning while still appearing operational?

Accepted Answer

A fan with a seized motor producing no airflow

Answer

A seized motor produces no airflow despite any residual noise or indicator light, making the system appear operational while it fails.

Question 2

When performing quality control on a sub-slab depressurization system, which measurement confirms adequate negative pressure beneath the slab?

Accepted Answer

Differential pressure between sub-slab and interior air

Answer

A negative differential pressure reading (sub-slab lower than interior) confirms the system is creating the intended suction.

Question 3

According to EPA standards, where must a sub-slab depressurization system exhaust its air?

Accepted Answer

Outside the building above the eave line

Answer

EPA requires exhaust discharge above the eave line and away from windows, doors, and air intakes to prevent re-entry.

Question 4

A homeowner reports that the U-tube manometer installed on their radon system shows equal fluid levels on both sides. What does this indicate?

Accepted Answer

No pressure differential exists, suggesting the fan may not be operating

Answer

Equal fluid levels in a U-tube manometer indicate no pressure difference, which means the fan is likely not creating sub-slab suction.

Question 5

What is the minimum number of post-mitigation radon tests required before issuing a compliance certificate under most state programs?

Accepted Answer

One short-term or long-term test

Answer

Most programs require at least one post-mitigation test to verify the system has reduced radon below the action level.

(RMS) Radon Mitigation Specialist Practice Test