ASNT RT I EXAM 120 QUESTIONS AND
CORRECT DETAILED ANSWERS
UPDATE ALREADY A GRADE|NEW!
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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,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
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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, 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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
CORRECT DETAILED ANSWERS
UPDATE ALREADY A GRADE|NEW!
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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,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
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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, 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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
