Industrial Radiography Quiz
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Industrial Radiography quiz for people studying for RT 2 CGSB exam.
- 1.Who is given credit for the discovery of X-ray?
- A.
Henri Becquerel
- B.
Wilhelm Roentgen
- C.
Marie Curie
- D.
Pierre Curie
- 2.There are four types of radiation-matter interactions that can contribute to the total attenuation. These are:
- A.
Compton scattering, pair production, photoelectric absorption, rayleigh scattering
- B.
Compton scattering, electron exchange, photoelectric absorption, rayleigh scattering
- C.
Electron exchange, pair production, photoelectric absorption, rayleigh scattering
- D.
None of the above
- 3.X-rays and Gamma rays are a form of:
- A.
Light
- B.
Particle Radiation
- C.
Electromagnetic Radiation
- D.
Both B and C
- 4.Who is given credit for the discovery of radioactive materials?
- A.
Henri Becquerel
- B.
Wilhelm Roentgen
- C.
Marie Curie
- D.
Pierre Curie
- 5.A specific radioactive source will always produce gamma rays at the same:
- A.
Intensity
- B.
Activity
- C.
Energy Levels
- D.
None of the above
- 6.Higher energy radiation will have more:
- A.
Speed
- B.
Incident Intensity
- C.
Penetrating Power
- D.
Both B and C
- 7.X-rays and Gamma rays present a health risk because they are a form of ionizing radiation, which means that the radiation has enough energy to:
- A.
Vibrate water molecules and generate heat
- B.
Break chemical bonds
- C.
Break physical bonds
- D.
None of the above
- 8.X-rays and Gamma rays have significant penetrating power due to their:
- A.
Short Wavelength
- B.
Medium Wavelength
- C.
Long Wavelength
- D.
Wide range of wavelengths
- 9.Ionizing radiation can be used in industrial radiography because the health hazards:
- A.
Have been eliminated with controls and procedures
- B.
Are minimized through controls and procedures
- C.
Are worth the risk
- D.
Are being ignored
- 10.X-rays and Gamma rays:
- A.
Always travel in a straight line
- B.
Can be influenced by an electrical field
- C.
Can be influenced by a magnetic field
- D.
None of the above
- 11.X-rays and Gamma rays are often referred to as photons because:
- A.
They possess a charge
- B.
They have mass
- C.
They occur as small packets of energy
- D.
None of the above
- 12.X-rays and Gamma rays:
- A.
Are both affected by radioactive decay
- B.
Are both produced by a radioactive atom
- C.
Have completely different properties
- D.
Differ only in their source
- 13.Newtons Inverse Square Law is useful in radiography because it indicates how the radiation intensity is affected by:
- A.
Radioactive decay
- B.
Distance from the source
- C.
The size of the source
- D.
None of the above
- 14.The rate at which a radioactive isotope changes to a more stable atom is know as the:
- A.
Isotope decay rate
- B.
Half-life
- C.
Activity
- D.
Attenuation
- 15.Attenuation of radiation is due to:
- A.
Absorption
- B.
Scattering
- C.
Radioactive decay
- D.
Both A and B
- 16.The number of X-ray or Gamma photons that are transmitted through a material depends on the:
- A.
Energy of the photons
- B.
Thickness of the material
- C.
Atomic number of the material
- D.
All of the above
- 17.After traveling through two half-value layers, the incident radiation has been reduced to:
- A.
50%
- B.
35%
- C.
20%
- D.
None of the above
- 18.The thickness of any given material where 50% of the incident energy has been attenuated is known as the:
- A.
Half-value layer
- B.
Linear attenuation coefficient
- C.
Decay rate
- D.
Mass attenuation coefficient
- 19.Undercut is the loss of resolution at a sharp, thickness transition area due to:
- A.
Scattering within the part
- B.
Backscatter
- C.
Sidescatter
- D.
Scattering within the film
- 20.Unexposed X-ray film is comprised of a plastic, transparent base coated with an emulsion containing radiation-sensitive particle known as:
- A.
Metalic silver crystals
- B.
Silver halide grains
- C.
Both A and B
- D.
Neither A and B
- 21.Collimators are used to:
- A.
Reduce the radiation beam spread
- B.
Filter the radiation beam
- C.
Increase film latitude
- D.
Decrease film latitude
- 22.Bremsstrahlung production of X-rays produces radiation that is composed of:
- A.
A small number of very defined energies
- B.
A continuous spectrum of energies over some range
- C.
Radiation of only one energy
- D.
None of the above
- 23.Exposure to ionizing radiation can be limited:
- A.
With the use of shielding
- B.
By increasing distance form the source
- C.
By limiting the time exposed to the radiation
- D.
All of the above
- 24.X-ray generators produce radiation through:
- A.
Bremsstrahlung processes
- B.
K-shell emmission processes
- C.
Radioactive decay
- D.
Both A and B
- 25.Manmade sources of radioactive sources are produced by:
- A.
By splitting the nucleus of atoms in the source material
- B.
Adding electrons to the source material
- C.
Introducing an extra neutron to the atoms of the source material
- D.
None of the above
- 26.Two of the more common industrial Gamma-ray sources are:
- A.
Cobalt-60 and iridium-192
- B.
Cobalt-60 and plutonium-240
- C.
Plutonium-240 and uranium-222
- D.
Iridium-192 and Lead-102
- 27.Stationary lab or shop X-ray systems usually rely on what to limit exposure to the radiation?
- A.
Distance controls
- B.
Time limits
- C.
Shielding
- D.
All of the above
- 28.Radiographic contrast describe:
- A.
The sharpness of lines in a radiograph
- B.
The differences in photographic density in a radiograph
- C.
The average photographic density in a radiograph
- D.
The difference in density between two different radiographs
- 29.Which of the following does not affect radiographic contrast?
- A.
Attenuation differences in the component being inspected
- B.
The wavelength of the radiaiton used
- C.
The amount of scattered radiation
- D.
The level of current used for the exposure
- 30.Film contrast is determined by:
- A.
The type of film used
- B.
The process by which the film was developed
- C.
The radiation energy used
- D.
Both A and B
- 31.When penetrating radiation is directed at a material, the radiation intensity decreases:
- A.
Decreases exponentially with increasing material thickness
- B.
Increase linearly with increasing material thickness
- C.
Decrease linearly with increasing material thickness
- D.
None of the above
- 32.The factor that indicates how much attenuation will take place per centimeter is known as the:
- A.
Mass attenuation coefficient
- B.
Linear attenuation coefficient
- C.
Decay rate
- D.
Atomic number
- 33.The main advantage of real-time radiography over film is:
- A.
Higher image contrast sensitivity
- B.
Inspection can be performed more rapidly
- C.
Higher image definition
- D.
Lower equipment costs
- 34.Which two types of radiation-matter interactions account for the majority of attenuation in typical industrial radiography?
- A.
Compton Scattering and photoelectric absorption
- B.
Compton Scattering and pair production
- C.
Pair production and photoelectric absorption
- D.
None of the above
- 35.In comparison with lower-voltage radiographs, high voltage radiographic images have:
- A.
Less contrast sensitivity
- B.
Greater contrast sensitivity
- C.
Greater amounts of scatter radiation relative to primary beam intensity
- D.
Less latitude
- 36.A radiograph made with an exposure of 8 mAm produces a density of 1.8. The sensitometric curve shows a difference in relative exposure between a density of 1.8 and the target density of 2.5 is 4. What must the new exposure time be to produce a radiograph with a density of 2.5?
- A.
4 mAminutes
- B.
2 mAminutes
- C.
32 mAminutes
- D.
None of the above
- 37.When using geometric magnefication to produce a radiograph, the penumbra will be reduced by:
- A.
A longer exposure
- B.
A faster film speed
- C.
A smaller source spot size
- D.
More X-ray energy
- 38.When flaws are in unknown locations, radiography is best suited for the detection of:
- A.
Volumetric defects such as porosity
- B.
Tight linear defects such as cracks
- C.
Material delaminations
- D.
The flaw type does not matter
- 39.The amount of geometric unsharpness in a radiograph is affected by:
- A.
The source to film distance
- B.
The source to object distance
- C.
The size of the source
- D.
All of the above
- 40.Lowering the energy of the radiation used to produce a radiograph will generally result in:
- A.
Less latitude
- B.
Higher contrast sensitivity
- C.
A Longer exposure time
- D.
All of the above
- 41.Radiation beam filters are sometime used in X-ray radiography to:
- A.
Remove some of the low energy radiation to increase definition
- B.
To remove some of the low energy radiation to increase contrast sensitivity
- C.
Remove some of the low energy radiation to reduce definition
- D.
Both A and B
- 42.Which of the following is not a strength of radiographic inspection?
- A.
It is not limited to material type
- B.
It can be used to inspect assembled components
- C.
It can detect surface and subsurface features
- D.
Access to both side of the test sample is required
- 43.Image quality indicators (IQIs) provide information about the level of:
- A.
Resolution and contrast sensitivity
- B.
Resolution and film latitude
- C.
Contrast sensitivity and latitude
- D.
Contrast sensitivity only
- 44.On a film radiograph, an area of high density in the test component will appear:
- A.
Lighter than the surrounding area
- B.
Darker than the surrounding area
- C.
More defined than the surrounding area
- D.
Less defined than the surrounding area
- 45.The drive cable of a gamma ray exposure device (camera) allows the radiographer to:
- A.
Turn on and shut off the gamma rays from a safe distance
- B.
Adjust the position of the camera from a safe distance
- C.
Move the source in and out of the camera while maintaining a safe distance
- D.
None of the above
- 46.Computed tomography X-ray techniques allow the test component to be:
- A.
Viewed in various cross-sectional slices
- B.
Viewed from different angles
- C.
Analyzed for chemical composition
- D.
None of the above
- 47.Thin sheets of lead foil in contact with the film during exposure increase the film density because:
- A.
They act as a filter to harden the radiation beam
- B.
They reduce the amount of scatter radiation
- C.
Incident radiation liberates electrons which help to expose the film
- D.
None of the above
- 48.Image quality indicators are usually placed:
- A.
Anywhere on the back side of the film
- B.
On the front side of the film near the primary area of interest
- C.
On the front side of the test component in an area of similar thickness to the primary area of interest
- D.
On the back side of the test component in the area of interest
- 49.Radiographic inspection should be used for crack detection only when:
- A.
The crack is large
- B.
The test component is a casting
- C.
The test component is a weldment
- D.
The orientation of the crack is known
- 50.The target of an X-ray tube is often made out of tungsten because:
- A.
It has a high atomic mass which will result in more X-rays being generated due to atomic particle interactions
- B.
It is an inexpensive material that is easy to machine
- C.
It have very high thermal conductivity which makes it easy to cool
- D.
None of the above
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