5715311
Questão 1
Questão
Atomic mass is the number of...
Responda
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Protons
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Neutrons
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Electrons
Questão 2
Questão
Atomic number is only concerned with protons
Responda
- True
- False
Questão 3
Questão
Electrons in which shell have the greatest binding energy?
Responda
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K
-
L
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M
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N
Questão 4
Questão
If you increase atomic number, you...
Responda
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Increase binding energy
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Decrease atomic mass
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Change the number of electrons
Questão 5
Questão
Which of these are particulate radiation?
Responda
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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
Questão 6
Questão
Alpha rays are more damaging than beta rays.
Responda
- True
- False
Questão 7
Questão
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
Questão 8
Questão
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
Questão 9
Questão
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
Questão 10
Questão
X-rays are [blank_start]high[blank_end] energy electromagnetic radiation produced by interactions of [blank_start]electrons[blank_end] with an atomic nucleus.
Responda
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high
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electrons
Questão 11
Questão
X-rays travel at the speed of light.
Responda
- True
- False
Questão 12
Questão
X-rays produce ionisation.
Responda
- True
- False
Questão 13
Questão
Most natural background radiation is from...
Responda
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Radon exposure
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Food
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Cosmic radiation
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Medical exposure
Questão 14
Questão
Absorption of X-rays occurs by the...
Responda
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Photoelectric effect
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Compton effect
Questão 15
Questão
Absorption is proportional to the cube of the...
Responda
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Atomic number
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Atomic mass
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X-ray energy
Questão 16
Questão
As well as contributing to the image, absorption gives rise to radiation dose.
Responda
- True
- False
Questão 17
Questão
Absorption is inversely proportional to the
Responda
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Cube of the X-ray energy
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Atomic number
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Atomic mass
Questão 18
Questão
X-ray scatter produces
Responda
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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
Questão 19
Questão
Coherent scatter tends to occur with...
Responda
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Low energy X-ray photons
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High energy X-ray photons
Questão 20
Questão
Absorption makes up the majority of X-ray interactions and 30-40% of this leads to operator dose.
Responda
- True
- False
Questão 21
Questão
Absorbed dose is measured in...
Responda
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milliGrays
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Microsiverts
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Arbitrary units
Questão 22
Questão
Equivalent dose =
Responda
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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
Questão 23
Questão
Effective dose =
Responda
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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
Questão 24
Questão
Effective dose is measured in...
Responda
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Milligrays
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Microsieverts
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Arbitrary units
Questão 25
Questão
One OPG is roughly equivalent to..
Responda
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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
Questão 26
Questão
Which type of dental radiography carries the highest risk of fatal cancer?
Responda
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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
Questão 27
Questão
New annual occupational dose limits say that non-classified workers such as dentists may be exposed up to...
Responda
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6 mSv
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20 mSv
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15 mSv
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5 mSv
Questão 28
Questão
Old annual occupational dose limits say that non-classified workers such as dentists could be exposed up to...
Responda
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15 mSv
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6 mSv
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20 mSv
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1 mSv
Questão 29
Questão
According to radiation legislation, dentists are classed as...
Responda
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General public
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Non-classified workers
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Classified workers
Questão 30
Questão
Effective dose considers the radiosensitivity of body organs as well as the type of radiation the patient is exposed to.
Responda
- True
- False
Questão 31
Questão
Equivalent dose considers the radiosensitivity of body organs as well as the type of radiation the patient is exposed to.
Responda
- True
- False
Questão 32
Questão
Effective dose = Absorbed dose x Radiation weighting factor
Responda
- True
- False
Questão 33
Questão
Equivalent dose = Absorbed dose x Radiation weighting factor
Responda
- True
- False
Questão 34
Questão
Absorbed dose is...
Responda
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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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