RADIATION PROTECTION FINAL EXAM QUESTIONS WITH CORRECT ANSWERS LATEST
UPDATE 2025/2026
The half-life of a radioactive element is the mass in grams of the element that will decay over
the course of its life cycle. T/F? - Answers False
The binding energy of a k-shell electron in a tungsten atom is:
a. 74 keV
b. radioactive
c. 48.6 keV
d. 69.5 keV - Answers 69.5 keV
The letter Z represents the ____________ of an element.
a. atomic number
b. number of neutrons
c. mass number
d. charge
e. number of electrons - Answers atomic number
The 3 cardinal rules of radiation protection when around radiation sources are to use: (letter)
a. as long a time as possible, as short a distance as possible, as much shielding as possible
b. as short a time as possible, as short a distance as possible, as little shielding as possible
c. as long a time as possible, as long a distance as possible, as little shielding as possible
d. precaution, protection, and protraction
e. as short a time as possible, as long a distance as possible, as much shielding as necessary -
Answers E
________________ radiation is known as particulate radiation because they contain actual
particles carrying energy.
,1. alpha
2. beta
3. gamma
4. x-rays
a. 3 and 4
b. 1 and 3
c. 1 only
d. 1 and 2
e. all of the above - Answers 1 and 2
The number of pulses in a wave cycle is:
a. 1
b. 2
c. 3
d. 4
e. 0 - Answers 2
E = h x _____:
a. T
b. lambda
c. c
d. q
e. f - Answers f
The top of a wave is called the:
,a. amplitude
b. trough
c. crest
d. period
e. wavelength - Answers crest
Which of the following is the symbol for tungsten?
a. Pb
b. T
c. Tg
d. W
e. We - Answers W
If an atom has a neutral charge, it has equal numbers of __________ and __________.
a. protons, neutrons
b. neutrons, electrons
c. isotopes, ions
d. protons, electrons - Answers protons, electrons
X-rays were discovered by:
a. Thomas Edison
b. Wilhelm Roentgen
c. Henry Radon
d. Ben Franklin - Answers Wilhelm Roentgen
, ______________ is the process of adding or removing an electrons from an atom's outer shell.
a. decay
b. electrification
c. elimination
d. occupation
e. ionization - Answers ionization
Which of the following are types of electromagnetic radiation?
a. alpha
b. beta
c. neutrons
d. x-rays
e. both c and d - Answers x-rays
The metric prefix "k" stands for which of the following?
a. 0.1
b. 0.001
c. 100
d. 1000
e. kinetic - Answers 0.001
In the metric system, length or distance is measured in the unit of:
a. inches
b. meters
UPDATE 2025/2026
The half-life of a radioactive element is the mass in grams of the element that will decay over
the course of its life cycle. T/F? - Answers False
The binding energy of a k-shell electron in a tungsten atom is:
a. 74 keV
b. radioactive
c. 48.6 keV
d. 69.5 keV - Answers 69.5 keV
The letter Z represents the ____________ of an element.
a. atomic number
b. number of neutrons
c. mass number
d. charge
e. number of electrons - Answers atomic number
The 3 cardinal rules of radiation protection when around radiation sources are to use: (letter)
a. as long a time as possible, as short a distance as possible, as much shielding as possible
b. as short a time as possible, as short a distance as possible, as little shielding as possible
c. as long a time as possible, as long a distance as possible, as little shielding as possible
d. precaution, protection, and protraction
e. as short a time as possible, as long a distance as possible, as much shielding as necessary -
Answers E
________________ radiation is known as particulate radiation because they contain actual
particles carrying energy.
,1. alpha
2. beta
3. gamma
4. x-rays
a. 3 and 4
b. 1 and 3
c. 1 only
d. 1 and 2
e. all of the above - Answers 1 and 2
The number of pulses in a wave cycle is:
a. 1
b. 2
c. 3
d. 4
e. 0 - Answers 2
E = h x _____:
a. T
b. lambda
c. c
d. q
e. f - Answers f
The top of a wave is called the:
,a. amplitude
b. trough
c. crest
d. period
e. wavelength - Answers crest
Which of the following is the symbol for tungsten?
a. Pb
b. T
c. Tg
d. W
e. We - Answers W
If an atom has a neutral charge, it has equal numbers of __________ and __________.
a. protons, neutrons
b. neutrons, electrons
c. isotopes, ions
d. protons, electrons - Answers protons, electrons
X-rays were discovered by:
a. Thomas Edison
b. Wilhelm Roentgen
c. Henry Radon
d. Ben Franklin - Answers Wilhelm Roentgen
, ______________ is the process of adding or removing an electrons from an atom's outer shell.
a. decay
b. electrification
c. elimination
d. occupation
e. ionization - Answers ionization
Which of the following are types of electromagnetic radiation?
a. alpha
b. beta
c. neutrons
d. x-rays
e. both c and d - Answers x-rays
The metric prefix "k" stands for which of the following?
a. 0.1
b. 0.001
c. 100
d. 1000
e. kinetic - Answers 0.001
In the metric system, length or distance is measured in the unit of:
a. inches
b. meters
