ASNT RT II FINAL EXAM PREP
2025/2026 ACCURATE QUESTIONS
WITH CORRECT DETAILED ANSWERS ||
100% GUARANTEED PASS
<LATEST VERSION>
1. The purpose for including a disc- shaped target that rotates rapidly during
operation in some x-ray tubes is to: - ANSWER ✓ increase the permissible
load
2. A device which is basically a combination of magnet and transformer
designed to guide and accelerate electrons in a circular orbit to very high
energies is called a: - ANSWER ✓ betatron
3. Two isotopic sources of a given strength have two different specific activity
values. The source with the higher specific activity value will: - ANSWER
✓ be of smaller physical size than the source with a lower specific activity
4. A gas- filled region located in an electrical field created by electrodes across
which a potential difference is applied forms the major portion of: -
ANSWER ✓ an ionization chamber
5. Two serious obstacles to high- intensity fluoroscopy are: - ANSWER ✓ the
limited brightness and large grain size of fluoroscopic screens
,6. In general, the quality of fluoroscopic equipment is best determined by -
ANSWER ✓ penetrameter sensitivity measurements
7. In fluoroscopic testing, a fundamental difficulty is the relative low
brightness level of the images. one method for increasing brightness utilizes
one of the following which converts light energy from the initial phosphor
surface to electrons which are accelerated and focused onto a smaller
fluorescent screen - ANSWER ✓ image amplifier or intensifier
8. A general rule governing the application of the geometric principles of
shadow formation states that: - ANSWER ✓ the central ray should be as
nearly perpendicular to the film as possible, to preserve spatial relationships
9. In order to utilize the principles of geometric enlargement (placing the film
at a distance from the specimen): - ANSWER ✓ the source of radiation must
be extremely small
10.The x-ray absorption of a specimen depends on - ANSWER ✓ the thickness
and density of the material AND the atomic number of the material
11.The radiographic absorption of a material will tend to become less
dependent upon the composition of the material when - ANSWER ✓ the
kilovoltage is increased
12.The formula (milliamperes X time) + distance(squared) is: - ANSWER ✓
the exposure factor
13.The load that can be handled by an x-ray tube focal spot is governed by: -
ANSWER ✓ the size of the focal spot and the efficiency of the cooling
system of the anode
14.X-ray exposure holders and cassettes often incorporate a sheet of lead foil in
the back which is not in intimate contact with the film the purpose of this
sheet of lead foil is - ANSWER ✓ to protect the film from backscatter
,15.A lead sheet containing a pinhole may be placed halfway between the x-ray
tube and the film in order to: - ANSWER ✓ determine the approximate size
of the focal spot
16.The most common way of cooling the anode of a high-power X-ray tube is -
ANSWER ✓ cooling by circulation of water or oil in the anode
17.In certain cases, it may be advantageous to pack lead shot around a
specimen. the purpose for doing this is - ANSWER ✓ to decrease the effect
of scattered radiation undercutting the specimen
18.The mottling caused by diffraction when radiographing fairly large-grained
metallic specimens can be reduced and in some cases eliminated by: -
ANSWER ✓ raising the kilovoltage and using lead foil screens
19.When radiographing steel with a thickness less than one inch - ANSWER ✓
a 250 kV x-ray machine would give greater radiographic sensitivity than
cobalt 60
20.A radiograph made with an exposure of 12mA per minute has a density of
0.8 int he region of maximum interest. it is desired to increase the density to
2.0 in this area. by reference to a characteristic curve of the film it is found
that the difference in log E between a density of 0.8 and 2.0 is 0.76. the
antilogarithm of log 0.76 is 5.8. what must the new exposure time be to
produce a radiograph with a density of 2.0? - ANSWER ✓ 69.6 mA per
minute
21.The absorption of radiation by a material varies - ANSWER ✓ in an
approximately exponential manner with the thickness of the material
22.In the micro radiographic technique - ANSWER ✓ soft x rays are usually
employed, a kilovoltage range of 5 to 50 kV is usually employed, and the
photographic material is often finer grained than an ordinary x-ray film
23.In order for a radiograph to have a penetrameter sensitivity of 2-2T or better:
- ANSWER ✓ the radiographic procedure must be able to define the 2T hole
in a penetrameter which is 2 percent of the thickness of the specimen
, 24.For practical purposes, the shape of the characteristic curve of an x-ray film
- ANSWER ✓ is independent of the quality of x or gamma radiation
25.The term which describes the total absorption of the useful beam caused by
the X-ray tube wall, the wall of the tube housing, and any material between
the tube and housing is - ANSWER ✓ inherent filtration
26.The interval between the time a film is placed in a fixer solution and the time
when the original diffuse, yellow milkiness disappears is known as -
ANSWER ✓ clearing time
27.Excessive subject contrast caused when the thickness range in the test
specimen is too great for the radiation quality used may be corrected by: -
ANSWER ✓ increasing the kilovoltage and using a filter at the X-ray tube
and increasing the exposure time
28.Improper geometric factors, poor contact between film and lead foil screens,
and graininess of film are possible causes of: - ANSWER ✓ poor definition
29.In fluoroscopy, the most common way to minimize operator fatigue is to: -
ANSWER ✓ change operators periodically
30.Which of the following x-ray generators would produce the narrowest cone
of x-radiation - ANSWER ✓ 25MeV
31.A radiograph is taken at a voltage of 500 kV. if the voltage is increases with
a resultant increase in the energy of radiation while all other conditions
remain the same - ANSWER ✓ there will be little significant change in the
graininess of the film
32.A radiograph of a steel weldment is made using a 15 MeV betatron. when
the radiograph is developed, there is an overall film mottling. a possible
cause for such mottling is - ANSWER ✓ failure to use a lead screen during
exposure
33.A basic difference between a radiograph and a fluoroscopic image is -
ANSWER ✓ the fluoroscopic image is a positive whereas the radiograph is a
negative transparency
2025/2026 ACCURATE QUESTIONS
WITH CORRECT DETAILED ANSWERS ||
100% GUARANTEED PASS
<LATEST VERSION>
1. The purpose for including a disc- shaped target that rotates rapidly during
operation in some x-ray tubes is to: - ANSWER ✓ increase the permissible
load
2. A device which is basically a combination of magnet and transformer
designed to guide and accelerate electrons in a circular orbit to very high
energies is called a: - ANSWER ✓ betatron
3. Two isotopic sources of a given strength have two different specific activity
values. The source with the higher specific activity value will: - ANSWER
✓ be of smaller physical size than the source with a lower specific activity
4. A gas- filled region located in an electrical field created by electrodes across
which a potential difference is applied forms the major portion of: -
ANSWER ✓ an ionization chamber
5. Two serious obstacles to high- intensity fluoroscopy are: - ANSWER ✓ the
limited brightness and large grain size of fluoroscopic screens
,6. In general, the quality of fluoroscopic equipment is best determined by -
ANSWER ✓ penetrameter sensitivity measurements
7. In fluoroscopic testing, a fundamental difficulty is the relative low
brightness level of the images. one method for increasing brightness utilizes
one of the following which converts light energy from the initial phosphor
surface to electrons which are accelerated and focused onto a smaller
fluorescent screen - ANSWER ✓ image amplifier or intensifier
8. A general rule governing the application of the geometric principles of
shadow formation states that: - ANSWER ✓ the central ray should be as
nearly perpendicular to the film as possible, to preserve spatial relationships
9. In order to utilize the principles of geometric enlargement (placing the film
at a distance from the specimen): - ANSWER ✓ the source of radiation must
be extremely small
10.The x-ray absorption of a specimen depends on - ANSWER ✓ the thickness
and density of the material AND the atomic number of the material
11.The radiographic absorption of a material will tend to become less
dependent upon the composition of the material when - ANSWER ✓ the
kilovoltage is increased
12.The formula (milliamperes X time) + distance(squared) is: - ANSWER ✓
the exposure factor
13.The load that can be handled by an x-ray tube focal spot is governed by: -
ANSWER ✓ the size of the focal spot and the efficiency of the cooling
system of the anode
14.X-ray exposure holders and cassettes often incorporate a sheet of lead foil in
the back which is not in intimate contact with the film the purpose of this
sheet of lead foil is - ANSWER ✓ to protect the film from backscatter
,15.A lead sheet containing a pinhole may be placed halfway between the x-ray
tube and the film in order to: - ANSWER ✓ determine the approximate size
of the focal spot
16.The most common way of cooling the anode of a high-power X-ray tube is -
ANSWER ✓ cooling by circulation of water or oil in the anode
17.In certain cases, it may be advantageous to pack lead shot around a
specimen. the purpose for doing this is - ANSWER ✓ to decrease the effect
of scattered radiation undercutting the specimen
18.The mottling caused by diffraction when radiographing fairly large-grained
metallic specimens can be reduced and in some cases eliminated by: -
ANSWER ✓ raising the kilovoltage and using lead foil screens
19.When radiographing steel with a thickness less than one inch - ANSWER ✓
a 250 kV x-ray machine would give greater radiographic sensitivity than
cobalt 60
20.A radiograph made with an exposure of 12mA per minute has a density of
0.8 int he region of maximum interest. it is desired to increase the density to
2.0 in this area. by reference to a characteristic curve of the film it is found
that the difference in log E between a density of 0.8 and 2.0 is 0.76. the
antilogarithm of log 0.76 is 5.8. what must the new exposure time be to
produce a radiograph with a density of 2.0? - ANSWER ✓ 69.6 mA per
minute
21.The absorption of radiation by a material varies - ANSWER ✓ in an
approximately exponential manner with the thickness of the material
22.In the micro radiographic technique - ANSWER ✓ soft x rays are usually
employed, a kilovoltage range of 5 to 50 kV is usually employed, and the
photographic material is often finer grained than an ordinary x-ray film
23.In order for a radiograph to have a penetrameter sensitivity of 2-2T or better:
- ANSWER ✓ the radiographic procedure must be able to define the 2T hole
in a penetrameter which is 2 percent of the thickness of the specimen
, 24.For practical purposes, the shape of the characteristic curve of an x-ray film
- ANSWER ✓ is independent of the quality of x or gamma radiation
25.The term which describes the total absorption of the useful beam caused by
the X-ray tube wall, the wall of the tube housing, and any material between
the tube and housing is - ANSWER ✓ inherent filtration
26.The interval between the time a film is placed in a fixer solution and the time
when the original diffuse, yellow milkiness disappears is known as -
ANSWER ✓ clearing time
27.Excessive subject contrast caused when the thickness range in the test
specimen is too great for the radiation quality used may be corrected by: -
ANSWER ✓ increasing the kilovoltage and using a filter at the X-ray tube
and increasing the exposure time
28.Improper geometric factors, poor contact between film and lead foil screens,
and graininess of film are possible causes of: - ANSWER ✓ poor definition
29.In fluoroscopy, the most common way to minimize operator fatigue is to: -
ANSWER ✓ change operators periodically
30.Which of the following x-ray generators would produce the narrowest cone
of x-radiation - ANSWER ✓ 25MeV
31.A radiograph is taken at a voltage of 500 kV. if the voltage is increases with
a resultant increase in the energy of radiation while all other conditions
remain the same - ANSWER ✓ there will be little significant change in the
graininess of the film
32.A radiograph of a steel weldment is made using a 15 MeV betatron. when
the radiograph is developed, there is an overall film mottling. a possible
cause for such mottling is - ANSWER ✓ failure to use a lead screen during
exposure
33.A basic difference between a radiograph and a fluoroscopic image is -
ANSWER ✓ the fluoroscopic image is a positive whereas the radiograph is a
negative transparency
