New Jersey Radon Technician Review Questions And
Complete Solutions
(d) is not detected by human senses, is naturally occurring, does not chemically react - Correct 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 - Correct 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 - Correct 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 - Correct 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
(d) 0.7 pCi/L outdoors and 1.3 pCi/L indoors
,(c) has lost or gained electrons - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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
(b) 0.6 - Correct 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 - Correct 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 -
Correct 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 - Correct 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 - Correct 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
(d) 75 pCi/L
(d) Polonium 214 and Polonium 218 - Correct 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 - Correct 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 - Correct 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
Complete Solutions
(d) is not detected by human senses, is naturally occurring, does not chemically react - Correct 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 - Correct 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 - Correct 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 - Correct 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
(d) 0.7 pCi/L outdoors and 1.3 pCi/L indoors
,(c) has lost or gained electrons - Correct 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 - Correct 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 - Correct 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 - Correct 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 - Correct 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
(b) 0.6 - Correct 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 - Correct 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 -
Correct 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 - Correct 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 - Correct 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
(d) 75 pCi/L
(d) Polonium 214 and Polonium 218 - Correct 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 - Correct 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 - Correct 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
