New Jersey Radon Technician Vocab & Notes with Complete Solutions 100%
Correct New
New Jersey Radon Technician Exam Prep
200 Multiple-Choice Practice Questions with Answers & Rationales
Based on NJDEP Regulations (N.J.A.C. 7:28-27) & EPA Standards
SECTION 1: Radon Fundamentals (Questions 1-40)
Question 1
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
Answer: D
Rationale: Radon-222 is a naturally occurring radioactive noble gas that is
colorless, odorless, and tasteless, making it impossible to detect with human
senses. As a noble gas, it does not chemically react with other substances.
Question 2
,The nucleus of an atom consists of:
A) Electrons and protons
B) Neutrons and electrons
C) Protons and neutrons
D) Protons, neutrons and electrons
Answer: C
Rationale: The nucleus of an atom contains protons (positively charged) and
neutrons (neutral). Electrons orbit the nucleus in electron shells and are not part
of the nucleus itself.
Question 3
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
Answer: C
,Rationale: The atomic number (number of protons) uniquely identifies an
element. For example, any atom with 92 protons is uranium. Neutrons determine
the isotope, not the element.
Question 4
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
Answer: A
Rationale: Based on national residential radon surveys, the average indoor radon
level in the U.S. is approximately 1.3 pCi/L, while the average outdoor level is
approximately 0.4 pCi/L.
Question 5
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
Answer: C
Rationale: An ion is an atom or molecule that has a net electrical charge because
it has lost (positive ion/cation) or gained (negative ion/anion) one or more
electrons from its neutral state.
Question 6
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
Answer: C
Rationale: One picoCurie (pCi) equals 2.22 disintegrations per minute (dpm).
When measured per liter of air (pCi/L), this represents the concentration of radon
gas. A pCi is one trillionth (10⁻¹²) of a Curie.
Correct New
New Jersey Radon Technician Exam Prep
200 Multiple-Choice Practice Questions with Answers & Rationales
Based on NJDEP Regulations (N.J.A.C. 7:28-27) & EPA Standards
SECTION 1: Radon Fundamentals (Questions 1-40)
Question 1
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
Answer: D
Rationale: Radon-222 is a naturally occurring radioactive noble gas that is
colorless, odorless, and tasteless, making it impossible to detect with human
senses. As a noble gas, it does not chemically react with other substances.
Question 2
,The nucleus of an atom consists of:
A) Electrons and protons
B) Neutrons and electrons
C) Protons and neutrons
D) Protons, neutrons and electrons
Answer: C
Rationale: The nucleus of an atom contains protons (positively charged) and
neutrons (neutral). Electrons orbit the nucleus in electron shells and are not part
of the nucleus itself.
Question 3
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
Answer: C
,Rationale: The atomic number (number of protons) uniquely identifies an
element. For example, any atom with 92 protons is uranium. Neutrons determine
the isotope, not the element.
Question 4
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
Answer: A
Rationale: Based on national residential radon surveys, the average indoor radon
level in the U.S. is approximately 1.3 pCi/L, while the average outdoor level is
approximately 0.4 pCi/L.
Question 5
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
Answer: C
Rationale: An ion is an atom or molecule that has a net electrical charge because
it has lost (positive ion/cation) or gained (negative ion/anion) one or more
electrons from its neutral state.
Question 6
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
Answer: C
Rationale: One picoCurie (pCi) equals 2.22 disintegrations per minute (dpm).
When measured per liter of air (pCi/L), this represents the concentration of radon
gas. A pCi is one trillionth (10⁻¹²) of a Curie.
