5715311
Frage 1
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Atomic mass is the number of...
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Protons
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Neutrons
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Electrons
Frage 2
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Atomic number is only concerned with protons
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- True
- False
Frage 3
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Electrons in which shell have the greatest binding energy?
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K
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L
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M
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N
Frage 4
Frage
If you increase atomic number, you...
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Increase binding energy
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Decrease atomic mass
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Change the number of electrons
Frage 5
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Which of these are particulate radiation?
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Alpha rays
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Beta rays
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X-rays
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Gamma rays
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Cosmic rays
Frage 6
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Alpha rays are more damaging than beta rays.
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- True
- False
Frage 7
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Capacity of particulate radiation to ionise depends on...
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Mass
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Velocity
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Charge
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Force
Frage 8
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Wave theory states that...
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Wavelength x Frequency = speed of light
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Energy = plancks constant x speed of light / wavelength
Frage 9
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Quantum theory states that...
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Energy = Speed of light x Plancks constant / Wavelength
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Wavelength x Frequency = Speed of light
Frage 10
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X-rays are [blank_start]high[blank_end] energy electromagnetic radiation produced by interactions of [blank_start]electrons[blank_end] with an atomic nucleus.
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high
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electrons
Frage 11
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X-rays travel at the speed of light.
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- True
- False
Frage 12
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X-rays produce ionisation.
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- True
- False
Frage 13
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Most natural background radiation is from...
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Radon exposure
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Food
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Cosmic radiation
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Medical exposure
Frage 14
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Absorption of X-rays occurs by the...
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Photoelectric effect
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Compton effect
Frage 15
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Absorption is proportional to the cube of the...
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Atomic number
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Atomic mass
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X-ray energy
Frage 16
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As well as contributing to the image, absorption gives rise to radiation dose.
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- True
- False
Frage 17
Frage
Absorption is inversely proportional to the
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Cube of the X-ray energy
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Atomic number
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Atomic mass
Frage 18
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X-ray scatter produces
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A compton recoil electron
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A photoelectron
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A weakened, deflected X-ray photon
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A full energy X-ray photon
Frage 19
Frage
Coherent scatter tends to occur with...
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Low energy X-ray photons
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High energy X-ray photons
Frage 20
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Absorption makes up the majority of X-ray interactions and 30-40% of this leads to operator dose.
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- True
- False
Frage 21
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Absorbed dose is measured in...
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milliGrays
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Microsiverts
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Arbitrary units
Frage 22
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Equivalent dose =
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Radiation weighting factor x Absorbed dose
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Tissue weighting factor x Absorbed dose x Radiation weighting factor
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Absorbed dose x Exposure
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Tissue weighting factor x Radiation weighting factor
Frage 23
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Effective dose =
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Absorbed dose x Tissue weighting factor x Radiation weighting factor
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Absorbed dose x Radiation weighting factor
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Absorbed dose x Tissue weighting factor
Frage 24
Frage
Effective dose is measured in...
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Milligrays
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Microsieverts
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Arbitrary units
Frage 25
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One OPG is roughly equivalent to..
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16 hours of natural background radiation
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3 days of natural background radiation
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A week of natural background radiation
Frage 26
Frage
Which type of dental radiography carries the highest risk of fatal cancer?
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CT scan of the Maxilla
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Lateral cephalogram
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OPG
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Bitewing radiograph
Frage 27
Frage
New annual occupational dose limits say that non-classified workers such as dentists may be exposed up to...
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6 mSv
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20 mSv
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15 mSv
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5 mSv
Frage 28
Frage
Old annual occupational dose limits say that non-classified workers such as dentists could be exposed up to...
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15 mSv
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6 mSv
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20 mSv
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1 mSv
Frage 29
Frage
According to radiation legislation, dentists are classed as...
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General public
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Non-classified workers
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Classified workers
Frage 30
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Effective dose considers the radiosensitivity of body organs as well as the type of radiation the patient is exposed to.
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- True
- False
Frage 31
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Equivalent dose considers the radiosensitivity of body organs as well as the type of radiation the patient is exposed to.
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- True
- False
Frage 32
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Effective dose = Absorbed dose x Radiation weighting factor
Antworten
- True
- False
Frage 33
Frage
Equivalent dose = Absorbed dose x Radiation weighting factor
Antworten
- True
- False
Frage 34
Frage
Absorbed dose is...
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The amount of energy absorbed from the X-ray beam
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The ability of radiation to ionise air
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The amount of energy absorbed from the X-ray beam as well as considering the type of radiation involved
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