Take The Ultimate Practice Questions On Radiography! Quiz
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Have you ever had a fracture and needed to get an X-ray? You might not have known it at the time, but the process whereby an image was taken of your skeleton is called radiography – it is defined as an imaging technique used in order to view the internal form of an object, another example of which you’ll find in an airport checking bags at the security line. What do you know about the study?
- 1.An excellent radiograph is obtained under given exposure conditions with a tube current of 5 milliamperes and an exposure time of 12 minutes. If other conditions are not changed, what exposure time would be required if the X-ray tube current could be raised to 10 milliamperes?
- A.
24 minutes
- B.
12 minutes
- C.
6 minutes
- D.
3 minutes
- 2.In film radiography, penetrameters are usually placed:
- A.
Between the intensifying screen and the film
- B.
On the source side of the test object
- C.
On the film side of the test object
- D.
Between the operator and the radiation source
- 3.When radiographing to the 2-2T quality level, an ASTM penetrameter for 1/2-inch thick 2024 aluminum alloy has a thickness of:
- A.
1/2 inch
- B.
2 mils
- C.
5 mils
- D.
10 mils
- 4.The penetrating ability of an X-ray beam is governed by:
- A.
Kilovoltage or wavelength
- B.
Time
- C.
Milliamperage
- D.
Source-to-film distance
- 5.Cobalt-60 used in nondestructive testing emits:
- A.
Alpha particles
- B.
Neutrons
- C.
Gamma rays
- D.
X rays
- 6.A densitometer is:
- A.
A meter used to measure X-ray intensity
- B.
An instrument for measuring film density
- C.
A meter used to measure the density of a material
- D.
A meter used to measure tube current
- 7.Three liquids which are essential to process an exposed film properly are:
- A.
Stop batch, acetic acid, and water
- B.
Developer, stop bath, and H2O2
- C.
Developer, fixer, and water
- D.
Acetic acid, fixer, and stop bath
- 8.The two most common causes for excessively high-density radiographs are:
- A.
Insufficient washing and overdevelopment
- B.
Contaminated fixer and insufficient washing
- C.
Overexposure and contaminated fixer
- D.
Overexposure and overdevelopment
- 9.The time required for one-half of the atoms in a particular sample of radioactive material to disintegrate is called:
- A.
The inverse square law
- B.
A curie
- C.
A half-life
- D.
The exposure time
- 10.What does the term R/hr refer to when speaking of intensity:
- A.
Radiation limits for humans
- B.
Roentgens per hour
- C.
X rays per hour
- D.
Radiation in hydrogen
- 11.The ability to detect a small discontinuity or flaw is called:
- A.
Radiographic contrast
- B.
Radiographic sensitivity
- C.
Radiographic density
- D.
Radiographic resolution
- 12.Movement, geometry, and screen contact are three factors that affect radiographic:
- A.
Contrast
- B.
Unsharpness
- C.
Reticulation
- D.
Density
- 13.The difference between the densities of two areas of a radiograph is called:
- A.
Radiographic contrast
- B.
Subject contrast
- C.
Film contrast
- D.
Definition Definition
- 14.Upon completing an X-ray exposure and turning the equipment off:
- A.
Personnel should wait for a few minutes before entering the exposure area
- B.
Personnel should wear a lead-lined apron before entering-the exposure area
- C.
Personnel should enter the exposure area without fear of radiation exposure
- D.
Personnel should take a reading with a survey meter before entering the exposure area.
- 15.The most widely used unit of measurement for measuring the rate at which the output of a gamma-ray source decays is the:
- A.
Curie
- B.
Roentgen
- C.
Half-life
- D.
MeV
- 16.Exposure to X rays or gamma rays:
- A.
May have a cumulative effect which must be considered when monitoring for maximum permissible dose
- B.
Will be beneficial since they build up an immunity to radiation poisoning
- C.
Will have no effect on human beings
- D.
Will have only a short-t€rm effect on human tissues
- 17.Which dose would be dangerous, if not fatal, if applied to the entire body in a short period of time:
- A.
1.5 to 15 R
- B.
25 to 70 R
- C.
200 to 800 R
- D.
All of the above doses would most likely be fatal
- 18.When doing gamma-ray radiography with high-intensity emitters, the sources are best handled:
- A.
Directly by personnel equipped with special protective clothing with speciar protective clothing.
- B.
By remote handling equipment
- C.
Directly by personnel with special protective clothing except when radiographs are being made
- D.
By the same methods used for low intensity emitters
- 19.If a film is placed in a developer solution and allowed to develop without any agitation:
- A.
The radiograph will not show proper contrast
- B.
It will be impossible to fix the radiograph permanently
- C.
There will be a general "fogging" condition over the entire radiograph
- D.
There will be a tendency for each area of the film to affect the development of the areas immediately below it
- 20.
- A.
The thickness of the part
- B.
The material of the specimen
- C.
The voltage range of the available X-ray machine
- D.
All three of the above factors
- 21.When radiographing a part which contains a large crack, the crack will appear on the radiograph as:
- A.
A dark, intermittent or continuous line
- B.
A light, irregular line
- C.
Either a dark or light line
- D.
A fogged area on the radiograph
- 22.A cobalt-60 source has a half-life of
- A.
1.2 years
- B.
6 months
- C.
5.3 years
- D.
75 days
- 23.X-ray heat is generated by:
- A.
The current passing through the filament (cathode)
- B.
The distance from the cathode to the anode
- C.
The type of material used in the target
- D.
The voltage and waveform applied to-the X-ray tube
- 24.The voltage and waveform applied to the X-ray tube by a high-voltage transformer primarily determines the:
- A.
Quantity of radiation
- B.
Duration of exposure
- C.
Penetrating ability
- D.
X-ray beam divergence
- 25.Lead foil in direct contact with X-ray film:
- A.
Intensifies the scatter radiation more than the primary radiation
- B.
Decreases the contrast of the radiographic image
- C.
Intensifies the primary radiation more than the scatter radiation
- D.
Should not be used when gamma rays are emitted by the source of radiation
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