©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 8:10PM.
ASNT RT I Exam Questions And Answers
2025 Update.
Although there may be other reasons for using calcium tungstate screens in industrial
radiography, they are most usually used to: - Answer✔Decrease exposure time
In film radiography, pentrameters are usually placed: - Answer✔on the source side of the test
object
The penetrating ability of an x-ray beam is governed by: - Answer✔Kilovoltage
Co-60 used in nondestructive testing emits: - Answer✔Gamma rays
A densitometer is an instrument for measuring: - Answer✔film density
Three liquids which are essential to process an exposed film properly are: - Answer✔Developer,
fixer and water
The two most common causes for excessively high-density radiographs are: -
Answer✔overexposure and underdevelopment
the time required for one-half of the atoms in a particular sample of radioactive material to
disintegrate is called: - Answer✔a half- life
What does the term R/h refer to when speaking of intensity? - Answer✔Roentgens per hour
The ability to detect a small discontinuity or flaw is called: - Answer✔radiographic sensitivity
Movement, geometry, and screen contact are three factors that affect radiographic: -
Answer✔unsharpness
The difference between the densities of two areas of a radiograph is called: -
Answer✔radiographic contrast
The most widely used unit of measurement for measuring the rate at which the output of a
gamma ray source decays is the: - Answer✔curie
1
, ©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 8:10PM.
Exposure to x-rays or gamma rays will have what effect on the body? - Answer✔It may have a
cumulative effect which must be considered
Which dose would be dangerous, if not fatal, if applied to the entire body in a short period of
time?
A. 1.5 - 15R
B. 25 - 70R
C. 200 - 800R
D. All of the above doses would most likely be fatal - Answer✔C. 200 - 800 R
When doing gamma ray radiography with high- intensity emitters, the sources are best
handled: - Answer✔by remote handling equipment
If a film is placed in a developer solution and allowed to develop without any agitation: -
Answer✔There will be a tendency for areas to affect each other
The selection of the proper type of film to be used for the x-ray examination of a particular part
depends on: - Answer✔the thickness of the part, the material of the specimen, the voltage
range of the available x-ray machine
A Co-60 source has a half life of: - Answer✔5.3 Years
x-ray tube current is controlled by: - Answer✔the current passing through the filament
The voltage and waveform applied to the x-ray tube by a high- voltage transformer primarily
determines the: - Answer✔penetrating ability
lead foil in direct contact with x-ray film: - Answer✔Intensifies the primary radiation more than
the scatter radiation
Fluorescent intensifying screens are usually mounted in pairs in rigid holders called: -
Answer✔Cassettes
Radiographic sensitivity, in the context of the minimum detectable flaw size, depends on: -
Answer✔graininess of the film, the unsharpness of the flaw image in the film and the contrast
the flaw image on the film
In order to decrease geometric unsharpness: - Answer✔Radiation should proceed from as small
a focal spot as other considerations will allow
As the Kilovoltage applied to the x-ray tube is raised: - Answer✔x-rays of shorter wavelength
and more penetrating power are produced
2
ASNT RT I Exam Questions And Answers
2025 Update.
Although there may be other reasons for using calcium tungstate screens in industrial
radiography, they are most usually used to: - Answer✔Decrease exposure time
In film radiography, pentrameters are usually placed: - Answer✔on the source side of the test
object
The penetrating ability of an x-ray beam is governed by: - Answer✔Kilovoltage
Co-60 used in nondestructive testing emits: - Answer✔Gamma rays
A densitometer is an instrument for measuring: - Answer✔film density
Three liquids which are essential to process an exposed film properly are: - Answer✔Developer,
fixer and water
The two most common causes for excessively high-density radiographs are: -
Answer✔overexposure and underdevelopment
the time required for one-half of the atoms in a particular sample of radioactive material to
disintegrate is called: - Answer✔a half- life
What does the term R/h refer to when speaking of intensity? - Answer✔Roentgens per hour
The ability to detect a small discontinuity or flaw is called: - Answer✔radiographic sensitivity
Movement, geometry, and screen contact are three factors that affect radiographic: -
Answer✔unsharpness
The difference between the densities of two areas of a radiograph is called: -
Answer✔radiographic contrast
The most widely used unit of measurement for measuring the rate at which the output of a
gamma ray source decays is the: - Answer✔curie
1
, ©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 8:10PM.
Exposure to x-rays or gamma rays will have what effect on the body? - Answer✔It may have a
cumulative effect which must be considered
Which dose would be dangerous, if not fatal, if applied to the entire body in a short period of
time?
A. 1.5 - 15R
B. 25 - 70R
C. 200 - 800R
D. All of the above doses would most likely be fatal - Answer✔C. 200 - 800 R
When doing gamma ray radiography with high- intensity emitters, the sources are best
handled: - Answer✔by remote handling equipment
If a film is placed in a developer solution and allowed to develop without any agitation: -
Answer✔There will be a tendency for areas to affect each other
The selection of the proper type of film to be used for the x-ray examination of a particular part
depends on: - Answer✔the thickness of the part, the material of the specimen, the voltage
range of the available x-ray machine
A Co-60 source has a half life of: - Answer✔5.3 Years
x-ray tube current is controlled by: - Answer✔the current passing through the filament
The voltage and waveform applied to the x-ray tube by a high- voltage transformer primarily
determines the: - Answer✔penetrating ability
lead foil in direct contact with x-ray film: - Answer✔Intensifies the primary radiation more than
the scatter radiation
Fluorescent intensifying screens are usually mounted in pairs in rigid holders called: -
Answer✔Cassettes
Radiographic sensitivity, in the context of the minimum detectable flaw size, depends on: -
Answer✔graininess of the film, the unsharpness of the flaw image in the film and the contrast
the flaw image on the film
In order to decrease geometric unsharpness: - Answer✔Radiation should proceed from as small
a focal spot as other considerations will allow
As the Kilovoltage applied to the x-ray tube is raised: - Answer✔x-rays of shorter wavelength
and more penetrating power are produced
2
