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