New Jersey Radon Technician Review Exam Questions And Answers 2025 Update.

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New Jersey Radon Technician Review Exam
Questions And Answers 2025 Update.


(d) is not detected by human senses, is naturally occurring, does not chemically react -
Answer✔Which of the following are characteristics of radon?
(a) has no static charge, solid particle, does not react chemically
(b) is a gas, radioactive, can be detected by human senses
(c) is man-made, does not chemically react, is a gas
(d) is not detected by human senses, is naturally occurring, does not chemically react

(c) protons and neutrons - Answer✔The nucleus of an atom consists of:
(a) electrons and protons
(b) neutrons and electrons
(c) protons and neutrons
(d) protons, neutrons and electrons

(c) the number of protons - Answer✔The characteristic of an atom that determines which
element it is is:
(a) the number of electrons
(b) the number of neutrons
(c) the number of protons
(d) the number of protons and neutrons

(a) 0.4 pCi/L outdoors and 1.3 pCi/L indoors - Answer✔The annual average U.S. outdoor and
indoor radon levels are:
(a) 0.4 pCi/L outdoors and 1.3 pCi/L indoors
(b) 0.5 pCi/L outdoors and 4.0 pCi/L indoors
(c) 0.6 pCi/L outdoors and 4.0 pCi/L indoors

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(d) 0.7 pCi/L outdoors and 1.3 pCi/L indoors

(c) has lost or gained electrons - Answer✔An ion is an atom that:
(a) cannot accept additional electrons
(b) cannot eliminate additional electrons
(c) has lost or gained electrons
(d) has no electrons

(c) 2.22 disintegrations per minute within a liter of air - Answer✔One picoCurie per liter of
radon is defined as:
(a) one billionth of a Curie
(b) 2.22 disintegrations per minute per gram of air
(c) 2.22 disintegrations per minute within a liter of air
(d) 37 billion disintegrations per second

(a) 4 hours - Answer✔It takes _____ hours for radon to reach secular equilibrium with its short-
lived decay products.
(a) 4 hours
(b) 12 hours
(c) 24 hours
(d) 48 hours

(b) 0.034 WL - Answer✔If the radon concentration is 8 pCi/L what is the Working Level of radon
decay products using common assumptions of equilibrium ER = 0.4?
(a) 0.024 WL
(b) 0.034 WL
(c) 0.040 WL
(d) 0.048 WL

(b) 7.5 pCi/L - Answer✔If the Working Level concentration is 0.03 WL, using common
assumptions of equilibrium (ER = 0.4), what is the radon concentration in the room?
(a) 10.0 pCi/L
(b) 7.5 pCi/L
(c) 6.0 pCi/L
(d) 5.0 pCi/L
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(b) 0.6 - Answer✔If the Working Level concentration is 0.06 and the radon concentration is 10
pCi/L, what is the Equilibrium Ratio?
(a) 0.4
(b) 0.6
(c) 1.0
(d) 4.0

(d) Radon 222 once formed, disappears in 3.8 days - Answer✔Which of the following is an
INCORRECT statement?
(a) Radon 222 is a radioactive gas
(b) Radon 222 is day product of radium
(c) Radon 222 is an inert gas
(d) Radon 222 once formed, disappears in 3.8 days
(a) a measurement of 0.016 WL of radon decay products means 4 pCi/L of radon exists in the
room - Answer✔Which of the following is NOT necessarily a correct statement?
(a) a measurement of 0.016 WL of radon decay products means 4 pCi/L of radon exists in the
room
(b) one picoCurie is one trillionth of a Curie
(c) one pCi/L is equal to 2.2 disintegration's in a liter of air in a minute
(d) WL is defined as the alpha energy released from radon decay products
(b) a measure of the amount of radiation produced by the radon decay products -
Answer✔Working Level is a measure of:
(a) a location of work within a uranium mine
(b) a measure of the amount of radiation produced by the radon decay products
(c) a time-dose measure of the exposure to radon decay products
(d) a measure of the amount of radiation produced by radon gas

(a) 13 pCi/L - Answer✔One-hundred (100) pCi/L of radon is inside a radon proof container. If
the container is re-measured in 11 1/2 days later, approximately how much radon is left in the
counter?
(a) 13 pCi/L
(b) 25 pCi/L
(c) 50 pCi/L

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(d) 75 pCi/L

(d) Polonium 214 and Polonium 218 - Answer✔Which of the following radon progeny groups
produce the alpha radiation representing the greatest health concern associated with radon?
(a) Bismuth 214 and Lead 210
(b) Bismuth 214 and Lead 214
(c) Lead 210 and Lead 214
(d) Polonium 214 and Polonium 218

(a) alpha radiation - Answer✔Which of the following types of radiation delivers the most
amount of energy per single impact to living tissue?
(a) alpha radiation
(b) beta radiation
(c) gamma radiation
(d) lead 210 deposition

(d) 2 protons and 2 neutrons - Answer✔An alpha particle is composed of:
(a) 1 proton and 1 electron
(b) 1 proton and 1 neutron
(c) 2 protons and 2 electrons
(d) 2 protons and 2 neutrons
(b) of the radon decay products that were produced from the radon in the room, only 40% are
measurable - Answer✔An equilibrium ratio of 0.4 is typically used when converting from
working level measurements to pCi/L. What does that mean?
(a) of the radon decay products produced from the radon in the room, 20% are attached to the
walls and another 20% are attached to suspended particulates in the room
(b) of the radon decay products that were produced from the radon in the room, only 40% are
measurable
(c) only 40% of the alpha energy of radon is being detected by the working level measurement
device
(d) radon decay product measurements have a fixed or set bias of 40%

(b) 125.0 pCi/L - Answer✔A measurement of 0.5 WL is made in a home. Using typical
equilibrium ratio assumptions (ER = 0.4), what is the radon concentration?
(a) 83.3 pCi/L

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