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NJ Radon Measurement Technician Exam| Questions and 100% Complete Solutions| A+ Rated
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NJ Radon Measurement Technician Exam|Questions and 100% Complete Solutions|
A+ Rated
A room has an equilibrium ratio of 0.5 and a radon concentration of 6 pCi/L. What is
its' Working Level? - ✔0.03
WL = (ER x pCi/L) / 100
A room has an equilibrium ratio of 0.6 and a radon concentration of 15 pCi/L. What is
the room's Working Level? - ✔0.09
WL = (ER x pCi/L) / 100
A room has an Working Level of 0.52 and a radon concentration level of 110 pCI/L. What is
the room's equilibrium ratio? - ✔0.47
ER = (WL x 100) / pCi/L
0.125 is equal to which of the following fractions?
- 1/16
- 1/5
- 1/8
- 1/12 - ✔1/8
,You run 2 simultaneous radon measurements which return results of 8.1 and 8.4 pCi/L. What
is their relative percent difference? - ✔3.6%
RPD = difference between results / average of results x 100
You run 2 simultaneous radon measurements which return results of 6.7 and 9.3 pCi/L. What
is their relative percent difference? - ✔32.5%
RPD = difference between results / average of results x 100
_________________ are continuous radon monitors that contain a chip attached to a power
supply. The decay of radon causes alpha particles to strike the chip, creating countable
electric pulses. - ✔Solid state silicon detectors
Activated charcoal devices measure radon by analyzing... - ✔Gamma ray activity from
lead-214 and bismuth-214
If the voltage of the electret in an electret ion chamber is less than _______________ before
testing, it must be replaced. - ✔200 volts
Continuous and grab devices measure radon by analyzing... - ✔alpha particles from the
decay of radon, polonium-218 and polonium-214
A long term test is defined as... - ✔91 days or longer
_______________ operate by the process of adsorption and measure the gamma decay of
lead-214 and bismuth-214. - ✔Activated charcoal devices
What makes alpha track detectors different from the other time-integrating devices covered
in this course? - ✔Alpha track detectors can be used for only long term measurements.
, The primary difference between electret ion chambers and the other time-integrating
measurement devices covered in this course is... - ✔You do not need to use a laboratory
for analysis when using electret ion chambers
__________________ are continuous RDP monitors. Inside the device, alpha particles from the
decay of RDPs strike a chip, which records a signal proportional to the energy of the
particle that struck it. - ✔Surface barrier detectors
A short term radon measurement device is deployed for... - ✔Between 2 and 90 days
_____________ are continuous radon monitors that detect ions created by alpha radiation
from the decay of radon. - ✔Pulsed ion chambers
Electret ion chambers measure radon by analyzing... - ✔Alpha, beta and gamma
radiation from the decay of radon and RDPs
(T/F) Most continuous radon monitors in the United States are active devices. - ✔FALSE: most
are PASSIVE devices
Which of the following is an example of a long term time-integrated radon measurement
device?
- Scintillation Cells
- Liquid Scintillation Devices
- Alpha Track Detectors
- Pulsed Ion Chambers - ✔Alpha Track Detectors
Alpha track detectors measure radon by analyazing... - ✔alpha particles from the decay
of radon, polonium-218 and polonium-214
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