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Radiography quiz on Radiation physics lecture

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Radiography 3

Radiography 3

Question 1 of 34

1

Atomic mass is the number of...

Select one or more of the following:

  • Protons

  • Neutrons

  • Electrons

Explanation

Question 2 of 34

1

Atomic number is only concerned with protons

Select one of the following:

  • True
  • False

Explanation

Question 3 of 34

1

Electrons in which shell have the greatest binding energy?

Select one of the following:

  • K

  • L

  • M

  • N

Explanation

Question 4 of 34

1

If you increase atomic number, you...

Select one of the following:

  • Increase binding energy

  • Decrease atomic mass

  • Change the number of electrons

Explanation

Question 5 of 34

1

Which of these are particulate radiation?

Select one or more of the following:

  • Alpha rays

  • Beta rays

  • X-rays

  • Gamma rays

  • Cosmic rays

Explanation

Question 6 of 34

1

Alpha rays are more damaging than beta rays.

Select one of the following:

  • True
  • False

Explanation

Question 7 of 34

1

Capacity of particulate radiation to ionise depends on...

Select one or more of the following:

  • Mass

  • Velocity

  • Charge

  • Force

Explanation

Question 8 of 34

1

Wave theory states that...

Select one of the following:

  • Wavelength x Frequency = speed of light

  • Energy = plancks constant x speed of light / wavelength

Explanation

Question 9 of 34

1

Quantum theory states that...

Select one of the following:

  • Energy = Speed of light x Plancks constant / Wavelength

  • Wavelength x Frequency = Speed of light

Explanation

Question 10 of 34

1

Fill the blank spaces to complete the text.

X-rays are energy electromagnetic radiation produced by interactions of with an atomic nucleus.

Explanation

Question 11 of 34

1

X-rays travel at the speed of light.

Select one of the following:

  • True
  • False

Explanation

Question 12 of 34

1

X-rays produce ionisation.

Select one of the following:

  • True
  • False

Explanation

Question 13 of 34

1

Most natural background radiation is from...

Select one of the following:

  • Radon exposure

  • Food

  • Cosmic radiation

  • Medical exposure

Explanation

Question 14 of 34

1

Absorption of X-rays occurs by the...

Select one of the following:

  • Photoelectric effect

  • Compton effect

Explanation

Question 15 of 34

1

Absorption is proportional to the cube of the...

Select one of the following:

  • Atomic number

  • Atomic mass

  • X-ray energy

Explanation

Question 16 of 34

1

As well as contributing to the image, absorption gives rise to radiation dose.

Select one of the following:

  • True
  • False

Explanation

Question 17 of 34

1

Absorption is inversely proportional to the

Select one of the following:

  • Cube of the X-ray energy

  • Atomic number

  • Atomic mass

Explanation

Question 18 of 34

1

X-ray scatter produces

Select one or more of the following:

  • A compton recoil electron

  • A photoelectron

  • A weakened, deflected X-ray photon

  • A full energy X-ray photon

Explanation

Question 19 of 34

1

Coherent scatter tends to occur with...

Select one of the following:

  • Low energy X-ray photons

  • High energy X-ray photons

Explanation

Question 20 of 34

1

Absorption makes up the majority of X-ray interactions and 30-40% of this leads to operator dose.

Select one of the following:

  • True
  • False

Explanation

Question 21 of 34

1

Absorbed dose is measured in...

Select one of the following:

  • milliGrays

  • Microsiverts

  • Arbitrary units

Explanation

Question 22 of 34

1

Equivalent dose =

Select one of the following:

  • Radiation weighting factor x Absorbed dose

  • Tissue weighting factor x Absorbed dose x Radiation weighting factor

  • Absorbed dose x Exposure

  • Tissue weighting factor x Radiation weighting factor

Explanation

Question 23 of 34

1

Effective dose =

Select one of the following:

  • Absorbed dose x Tissue weighting factor x Radiation weighting factor

  • Absorbed dose x Radiation weighting factor

  • Absorbed dose x Tissue weighting factor

Explanation

Question 24 of 34

1

Effective dose is measured in...

Select one of the following:

  • Milligrays

  • Microsieverts

  • Arbitrary units

Explanation

Question 25 of 34

1

One OPG is roughly equivalent to..

Select one of the following:

  • 16 hours of natural background radiation

  • 3 days of natural background radiation

  • A week of natural background radiation

Explanation

Question 26 of 34

1

Which type of dental radiography carries the highest risk of fatal cancer?

Select one of the following:

  • CT scan of the Maxilla

  • Lateral cephalogram

  • OPG

  • Bitewing radiograph

Explanation

Question 27 of 34

1

New annual occupational dose limits say that non-classified workers such as dentists may be exposed up to...

Select one of the following:

  • 6 mSv

  • 20 mSv

  • 15 mSv

  • 5 mSv

Explanation

Question 28 of 34

1

Old annual occupational dose limits say that non-classified workers such as dentists could be exposed up to...

Select one of the following:

  • 15 mSv

  • 6 mSv

  • 20 mSv

  • 1 mSv

Explanation

Question 29 of 34

1

According to radiation legislation, dentists are classed as...

Select one of the following:

  • General public

  • Non-classified workers

  • Classified workers

Explanation

Question 30 of 34

1

Effective dose considers the radiosensitivity of body organs as well as the type of radiation the patient is exposed to.

Select one of the following:

  • True
  • False

Explanation

Question 31 of 34

1

Equivalent dose considers the radiosensitivity of body organs as well as the type of radiation the patient is exposed to.

Select one of the following:

  • True
  • False

Explanation

Question 32 of 34

1

Effective dose = Absorbed dose x Radiation weighting factor

Select one of the following:

  • True
  • False

Explanation

Question 33 of 34

1

Equivalent dose = Absorbed dose x Radiation weighting factor

Select one of the following:

  • True
  • False

Explanation

Question 34 of 34

1

Absorbed dose is...

Select one of the following:

  • 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

Explanation

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