1
Essentials of Radiographic Physics and Imaging,
4th Edition James Johnston | Test Bank
Questions 1-600 | Graded A+
,2
Essentials of Radiographic Physics and Imaging, 4th
Edition James Johnston | Test Bank Questions 1-
600 | Graded A+
1. Which of the following statements accurately describes the fundamental concept of the
"image receptor" in radiographic imaging?
A. It is the device that generates the x-ray beam.
B. It is the component that converts x-ray energy into a visible image.
C. It is the control panel used to select exposure factors.
D. It is the protective housing surrounding the x-ray tube.
Correct Answer: B
Explanation: The image receptor is the device that intercepts the x-ray beam after it has
passed through the patient and converts the x-ray energy into a visible image. Option A
is incorrect because the x-ray tube generates the x-ray beam. Option C is incorrect
because the control panel is used to select exposure factors. Option D is incorrect
because the protective housing surrounds the x-ray tube.
,3
2. According to the electromagnetic spectrum, which of the following types of radiation
has the shortest wavelength and highest energy?
A. Radio waves
B. Visible light
C. X-rays
D. Infrared radiation
Correct Answer: C
Explanation: X-rays have very short wavelengths and high energy, placing them at the
high-energy end of the electromagnetic spectrum. Option A is incorrect because radio
waves have long wavelengths and low energy. Option B is incorrect because visible light
has a longer wavelength and lower energy than x-rays. Option D is incorrect because
infrared radiation has a longer wavelength and lower energy than x-rays.
3. In the context of atomic structure, the number of protons in the nucleus of an atom
defines the:
A. Atomic mass number
B. Atomic number
, 4
C. Electron configuration
D. Isotopic number
Correct Answer: B
Explanation: The atomic number (Z) is defined as the number of protons in the nucleus of
an atom. Option A is incorrect because the atomic mass number is the total number of
protons and neutrons. Option C is incorrect because electron configuration describes the
arrangement of electrons in orbitals. Option D is incorrect because the isotopic number is
not a standard term for proton count.
4. Which of the following is the primary function of the high-voltage generator in the x-ray
circuit?
A. To step down the voltage for the filament circuit.
B. To increase the voltage to kilovoltage levels for x-ray production.
C. To convert AC to DC for the x-ray tube.
D. To provide a low-voltage current for the rotor.
Correct Answer: B
Explanation: The high-voltage generator (typically a step-up transformer) increases the
Essentials of Radiographic Physics and Imaging,
4th Edition James Johnston | Test Bank
Questions 1-600 | Graded A+
,2
Essentials of Radiographic Physics and Imaging, 4th
Edition James Johnston | Test Bank Questions 1-
600 | Graded A+
1. Which of the following statements accurately describes the fundamental concept of the
"image receptor" in radiographic imaging?
A. It is the device that generates the x-ray beam.
B. It is the component that converts x-ray energy into a visible image.
C. It is the control panel used to select exposure factors.
D. It is the protective housing surrounding the x-ray tube.
Correct Answer: B
Explanation: The image receptor is the device that intercepts the x-ray beam after it has
passed through the patient and converts the x-ray energy into a visible image. Option A
is incorrect because the x-ray tube generates the x-ray beam. Option C is incorrect
because the control panel is used to select exposure factors. Option D is incorrect
because the protective housing surrounds the x-ray tube.
,3
2. According to the electromagnetic spectrum, which of the following types of radiation
has the shortest wavelength and highest energy?
A. Radio waves
B. Visible light
C. X-rays
D. Infrared radiation
Correct Answer: C
Explanation: X-rays have very short wavelengths and high energy, placing them at the
high-energy end of the electromagnetic spectrum. Option A is incorrect because radio
waves have long wavelengths and low energy. Option B is incorrect because visible light
has a longer wavelength and lower energy than x-rays. Option D is incorrect because
infrared radiation has a longer wavelength and lower energy than x-rays.
3. In the context of atomic structure, the number of protons in the nucleus of an atom
defines the:
A. Atomic mass number
B. Atomic number
, 4
C. Electron configuration
D. Isotopic number
Correct Answer: B
Explanation: The atomic number (Z) is defined as the number of protons in the nucleus of
an atom. Option A is incorrect because the atomic mass number is the total number of
protons and neutrons. Option C is incorrect because electron configuration describes the
arrangement of electrons in orbitals. Option D is incorrect because the isotopic number is
not a standard term for proton count.
4. Which of the following is the primary function of the high-voltage generator in the x-ray
circuit?
A. To step down the voltage for the filament circuit.
B. To increase the voltage to kilovoltage levels for x-ray production.
C. To convert AC to DC for the x-ray tube.
D. To provide a low-voltage current for the rotor.
Correct Answer: B
Explanation: The high-voltage generator (typically a step-up transformer) increases the
