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LRA 211 Questions and Correct Answers
The earliest atomic theory based on an arrangement similar to the
solar system is attributed to Ans: Rutherford
The three fundamental particles of the atom are the Ans: neutron,
electron, and photon
The atomic nucleus contains Ans: protons and neutrons
The component of the nucleus that has a positive charge and mass
is the Ans: proton
The electron shell closest to the nucleus is lettered Ans: "K"
Which of the following is not part of the electromagnetic
spectrum? Ans: sound
Which of the following electromagnetic radiations have the lowest
energy level? Ans: radio waves
As the wave's frequency increases, the wavelength: Ans: decreases
Frequency is typically measured in: Ans: Hertz
The process of removing an electron from an atom is Ans:
ionization
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X-ray are produced Ans: using fast-moving electrons
Which of the following helps to keep the x-ray tube cool on the
inside of the protective housing? Ans: cooling fans and an oil bath
In terms of the x-ray tube, envelope is another name for the Ans:
glass or metal enclosure
The positive end of the x-ray tube is the Ans: anode
The negative end of the x-ray tube is the Ans: cathode
The area of the envelope where x-rays should exit the tube is the
Ans: target window
The anode serves as a(n) Ans: all of these
-target for the electron interaction to produce x-ray
-electrical conductor
-heat conductor
The two types of anode designs are stationary and Ans: rotating
Tungsten is used to coat the anode disc because it Ans: has a high
atomic number
With a rotating anode, the focal spot becomes a focal Ans: track
© 2025 All rights reserved
LRA 211 Questions and Correct Answers
The earliest atomic theory based on an arrangement similar to the
solar system is attributed to Ans: Rutherford
The three fundamental particles of the atom are the Ans: neutron,
electron, and photon
The atomic nucleus contains Ans: protons and neutrons
The component of the nucleus that has a positive charge and mass
is the Ans: proton
The electron shell closest to the nucleus is lettered Ans: "K"
Which of the following is not part of the electromagnetic
spectrum? Ans: sound
Which of the following electromagnetic radiations have the lowest
energy level? Ans: radio waves
As the wave's frequency increases, the wavelength: Ans: decreases
Frequency is typically measured in: Ans: Hertz
The process of removing an electron from an atom is Ans:
ionization
© 2025 All rights reserved
, 2 | Page
X-ray are produced Ans: using fast-moving electrons
Which of the following helps to keep the x-ray tube cool on the
inside of the protective housing? Ans: cooling fans and an oil bath
In terms of the x-ray tube, envelope is another name for the Ans:
glass or metal enclosure
The positive end of the x-ray tube is the Ans: anode
The negative end of the x-ray tube is the Ans: cathode
The area of the envelope where x-rays should exit the tube is the
Ans: target window
The anode serves as a(n) Ans: all of these
-target for the electron interaction to produce x-ray
-electrical conductor
-heat conductor
The two types of anode designs are stationary and Ans: rotating
Tungsten is used to coat the anode disc because it Ans: has a high
atomic number
With a rotating anode, the focal spot becomes a focal Ans: track
© 2025 All rights reserved
