RMS System Design & Installation

Question 1

What is the most common type of active radon mitigation system installed in U.S. homes?

Accepted Answer

Active sub-slab depressurization (ASD)

Answer

Active sub-slab depressurization is the most common and effective residential radon mitigation method, using a fan to draw radon from beneath the slab and vent it above the roofline.

Question 2

Where should the radon vent pipe exhaust be located?

Accepted Answer

Above the roofline, at least 10 feet from windows and openings

Answer

The radon exhaust must terminate above the roof and at least 10 feet from any operable opening to prevent re-entry of radon into the building.

Question 3

What type of fan is typically used in residential radon mitigation systems?

Accepted Answer

Inline centrifugal fan rated for continuous operation

Answer

Residential radon systems use inline centrifugal fans specifically designed for continuous 24/7 operation, installed in the vent pipe above the living space or in the attic.

Question 4

What is a diagnostic pressure field extension test?

Accepted Answer

A test measuring how far suction extends under the slab from the mitigation point

Answer

Pressure field extension testing measures suction at various points under the slab to verify that a single suction point adequately depressurizes the entire sub-slab area.

Question 5

What sealant is typically used to seal pipe penetrations in radon systems?

Accepted Answer

Polyurethane caulk or fire-rated sealant rated for the application

Answer

Polyurethane caulk or appropriate fire-rated sealants are used to seal pipe penetrations, cracks, and joints to prevent radon from bypassing the mitigation system through unsealed openings.

(RMS) Radon Mitigation Specialist Practice Test

(RMS) Radon Mitigation Specialist Practice Test

RMS System Design & Installation