RMS Radon Measurement Techniques 2

Question 1

Which type of radon test device is considered a 'passive' measurement device?

Accepted Answer

Electret ion chamber

Answer

Electret ion chambers are passive devices that do not require power or active airflow to collect radon measurements.

Question 2

What is the minimum recommended test duration for a short-term radon test using charcoal canisters?

Accepted Answer

24 hours

Answer

EPA guidelines require charcoal canister short-term tests to be deployed for a minimum of 48 hours, though 24 hours is the minimum for some charcoal liquid scintillation devices.

Question 3

A continuous radon monitor placed in a basement shows significantly higher readings at night than during the day. What is the most likely explanation?

Accepted Answer

Stack effect causing increased radon entry overnight

Answer

The stack effect increases overnight when windows and doors are closed and temperature differentials drive soil gas (including radon) into the building.

Question 4

Which measurement protocol must be followed when conducting a post-mitigation test to ensure accurate results?

Accepted Answer

Closed-house conditions for at least 24 hours prior

Answer

EPA protocols require closed-house conditions for at least 24 hours before and during a post-mitigation short-term test.

Question 5

An alpha track detector measures radon by recording:

Accepted Answer

Alpha particle damage tracks on a sensitive film

Answer

Alpha track detectors contain a special plastic film (LR-115 or CR-39) that retains microscopic damage tracks from alpha particles emitted during radon decay.

(RMS) Radon Mitigation Specialist Practice Test

(RMS) Radon Mitigation Specialist Practice Test

RMS Radon Measurement Techniques 2