NJ RADON MEASUREMENT TECHNICIAN
EXAM (PRACTICE QUESTIONS &
ANSWERS) % SOLVED.
What does it mean for a radon decay product to be "plated out"? Ans- It has attached to a
non-breathable object
If a radon decay product attaches to a solid object, such as a wall, it... Ans- ...can no longer
be...
What does it mean for a radon decay product to be "plated out"? Ans✔✔- It has attached to a
non-breathable object
If a radon decay product attaches to a solid object, such as a wall, it... Ans ✔✔- ...can no longer
be inhaled.
What is a half-life? Ans✔✔- The time required for half of the atoms of a radioactive element to
decay.
Which type of radiation is responsible for the most cellular damage associated with radon and
radon decay products? Ans✔✔- Alpha
The negatively charged subatomic particle that orbits the nucleus is called a(n) Ans ✔✔-
electron
Radon decay products that are not attached to airborne particles are much more likely to...
Ans✔✔- deposit radiation into lung tissue if inhaled.
The number of protons plus the number of neutrons in a specific atom is called Ans ✔✔- Mass
number
The number of protons in an atom's nucleus is the same as the atom's... Ans✔✔- Atomic
number
,The commonly assumed equilibrium ratio of radon decay products is: Ans ✔✔- 0.4
All atoms of the same element must have the same... Ans ✔✔- Atomic number
The number of ______________ in an atom determines which element it is. Ans✔✔- Protons
_________________ causes a neutral atom to become an ion. Ans ✔✔- The gain or loss of
electrons
________________ is a unit used to measure radon concentration. Ans ✔✔- Picocurie per liter
(pCi/L)
When ___________ decays, it produces Radon-222 Ans✔✔- Radium-226
For an atom to be neutrally charged... Ans ✔✔- it's number of protons and electrons must be
equal.
Different atoms of the same element can have differing numbers of neutrons. What are these
different kinds of the same element called? Ans✔✔- isotopes
What is the half-life of radon-222? Ans✔✔- 3.8 days
Stack effect is caused by... Ans✔✔- Temperature differentials
3 factors that effect radon's ability to move through the soil: Ans ✔✔- 1. Size of mineral grain in
the soil
2. Dryness of the soil
3. Permeability of the soil
, (T/F) There is a strong correlation between low ventilation rates and high radon levels.
Ans✔✔- False: there is not a strong correlation
(T/F) Radon entry, and therefore indoor radon concentrations, do not vary over relatively short
periods of time. Ans✔✔- FALSE: they do vary over relatively short periods of time.
All of the following are driving forces that can bring radon into a home except:
- Diffusion
- Evaporation
- Emanation
- Well water Ans✔✔- Evaporation
The area below the neutral pressure plane in a home... Ans ✔✔- Draws air into the home
The 3 major factors of radon entry into a home are: Ans ✔✔- - Radon source strength
- Transport of radon
- ventilation rate
Radon plays what role in the average American's annual radiation exposure? Ans ✔✔- It is the
2nd greatest contributor.
The EPA estimates that the risk of lung cancer death for a current smoker with a constant radon
exposure of 4 pCi/L is _____________ in 1,000. Ans ✔✔- 62
The EPA estimates that approximately ____________ lung cancer deaths per year are related
to inhalation of radon and radon decay products. Ans ✔✔- 21,000
____________ and _____________ are the two radon decay products that contribute the
largest dose of radiation associated with RDPs. Ans ✔✔- Polonium-218 and polonium-214
Which of the following effects is NOT caused by ionizing radiation?
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