RMS Diagnostic Testing & Troubleshooting 3

Question 1

What is the purpose of a short-circuit test in sub-slab depressurization diagnostics?

Accepted Answer

To identify locations where outdoor air is entering the sub-slab and reducing system efficiency

Answer

A short-circuit test identifies locations where atmospheric air enters the sub-slab zone, reducing the system's ability to maintain sufficient negative pressure.

Question 2

A homeowner reports that their mitigation fan has become noticeably loud after years of quiet operation. What should the technician inspect?

Accepted Answer

Fan bearings, motor mounts, and pipe connections for wear, vibration, or looseness

Answer

Increased fan noise after quiet operation typically indicates bearing wear, loose motor mounts, or vibrating pipe connections requiring inspection and repair.

Question 3

During diagnostic testing of a slab-on-grade home, a technician notices that a floor drain is open to the sub-slab area. What is the appropriate response?

Accepted Answer

Identify it as a potential radon bypass pathway and address it in the mitigation plan

Answer

Open floor drains can be direct pathways for soil gas radon to enter the living space and must be addressed as part of a complete mitigation design.

Question 4

When evaluating a sub-slab depressurization system for adequate coverage, what measurement is taken at multiple locations across the slab?

Accepted Answer

The pressure differential between the sub-slab and the building interior

Answer

Pressure differential measurements at multiple points confirm that the negative pressure zone extends across the entire sub-slab area requiring coverage.

Question 5

If diagnostic testing reveals that two sections of a basement have isolated sub-slab conditions with no interconnection, what mitigation design is most appropriate?

Accepted Answer

Design separate suction points or systems for each isolated section

Answer

Isolated sub-slab sections each need their own suction point to ensure adequate depressurization is achieved throughout the entire foundation.

(RMS) Radon Mitigation Specialist Practice Test

(RMS) Radon Mitigation Specialist Practice Test

RMS Diagnostic Testing & Troubleshooting 3