RT Level 2 Questions ASNT
Low voltage x-ray tubes are typically fitted with home windows made of:
beryllium
A monochromatic x-ray beam
a beam such as a unmarried wavelength
The wellknown method of manufacturing x-rays entails the surprising deceleration of
excessive velocity electrons in a solid body referred to as a
cathode
If it had been necessary to radiograph a 7-inch thick metal product, which of the subsequent
gamma-ray assets could maximum probable be used?
Cobalt-60
A cobalt-60 gamma ray source has an approximate sensible thickness restriction of
nine inches of metallic or its equivalent
the absorption of gamma rays from a given source whilst passing thru count relies upon on
the:
atomic number, density, and thickness of the problem
The truth that gases, when bombarded by radiation, ionize and come to be electric
conductors lead them to beneficial in
radiation detection gadget
The pace of electrons putting the target in an X-ray tube is a function of
the voltage distinction among the cathode and anode
The uneven distribution of advanced grains inside the emulsion of a processed x-ray film
causes the subjective impression of
graininess
Of the following, the source providing the maximum penetrating radiation is
,15 MeV x-ray betatron
The gamma-ray depth at one foot from a one curie source of radioactive cobalt-60 is nearest
15 roentgens consistent with hour
The focal spot in an x-ray tube
have to be as small as possible without unduly shortening the existence of the tube
in an x-ray tube, the filament and focusing cup are the two vital components of the:
cathode
The amount of radiation so as to produce, by using ionization, one electrostatic unit of power
in 0.001293 grams of dry air is referred to as
a roentgen
We have an professional-written technique to this hassle!
The precise pastime of an isotopic source is normally measured in
curies in keeping with gram
Which of the subsequent isotopes has the longest half of-existence?
Cesium-137
The number one shape of power conversion whilst electrons strike a goal in an X-ray tube
outcomes inside the manufacturing of
warmth
The slope of a directly line joining points of unique densities on a feature curve of a film is
called the
common gradient
an x-ray movie having extensive range also has, via definition:
low contrast
The purpose for circulating oil in a few sorts of X-ray tubes is
to burn up heat
, An X-ray tube with a small focal spot is taken into consideration higher than one with a large
focal spot while it is described to acquire
higher definition
one approach of decreasing radiographic contrast is to:
lower the wavelength of the radiation used
Thin sheets of lead foil in contact with the movie throughout exposure boom the film density
due to the fact:
they emit electrons while uncovered to x and gamma radiation which assist darken the film
x-ray tubes are regularly closed in a shockproof casing so one can:
shield the operator from excessive-voltage shock
an x-ray tube is rated for a maximum of 250 kVp. This tube can be operated at a most of:
250,000 volts top voltage
a voltage selector along with an iron center transformer with a unmarried winding having a
sequence of faucets at various points on the winding is referred to as
an autotransformer
in x-ray radiography, alternating contemporary have to be changed to pulsating direct
modern in order to satisfy the want for unidirectional modern. This alteration may be
completed with the aid of:
rectifiers
when radiographing to the 2-2T excellent stage, an ASTM pentameter for a 2.5 inch steel
has a thickness of
50 mils
Valve tubes are used in x-ray system to:
Provide essential rectification.
A right cobalt-60 radiograph is made on a three inch steel casting using an exposure time of
10 mins and a source-to-film distance of 36 inches. It is important to trade the source-to-film
distance to 24 inches, what publicity time might produce a comparable radiograph if all other
conditions continue to be the equal ?
Four.4 minutes
Low voltage x-ray tubes are typically fitted with home windows made of:
beryllium
A monochromatic x-ray beam
a beam such as a unmarried wavelength
The wellknown method of manufacturing x-rays entails the surprising deceleration of
excessive velocity electrons in a solid body referred to as a
cathode
If it had been necessary to radiograph a 7-inch thick metal product, which of the subsequent
gamma-ray assets could maximum probable be used?
Cobalt-60
A cobalt-60 gamma ray source has an approximate sensible thickness restriction of
nine inches of metallic or its equivalent
the absorption of gamma rays from a given source whilst passing thru count relies upon on
the:
atomic number, density, and thickness of the problem
The truth that gases, when bombarded by radiation, ionize and come to be electric
conductors lead them to beneficial in
radiation detection gadget
The pace of electrons putting the target in an X-ray tube is a function of
the voltage distinction among the cathode and anode
The uneven distribution of advanced grains inside the emulsion of a processed x-ray film
causes the subjective impression of
graininess
Of the following, the source providing the maximum penetrating radiation is
,15 MeV x-ray betatron
The gamma-ray depth at one foot from a one curie source of radioactive cobalt-60 is nearest
15 roentgens consistent with hour
The focal spot in an x-ray tube
have to be as small as possible without unduly shortening the existence of the tube
in an x-ray tube, the filament and focusing cup are the two vital components of the:
cathode
The amount of radiation so as to produce, by using ionization, one electrostatic unit of power
in 0.001293 grams of dry air is referred to as
a roentgen
We have an professional-written technique to this hassle!
The precise pastime of an isotopic source is normally measured in
curies in keeping with gram
Which of the subsequent isotopes has the longest half of-existence?
Cesium-137
The number one shape of power conversion whilst electrons strike a goal in an X-ray tube
outcomes inside the manufacturing of
warmth
The slope of a directly line joining points of unique densities on a feature curve of a film is
called the
common gradient
an x-ray movie having extensive range also has, via definition:
low contrast
The purpose for circulating oil in a few sorts of X-ray tubes is
to burn up heat
, An X-ray tube with a small focal spot is taken into consideration higher than one with a large
focal spot while it is described to acquire
higher definition
one approach of decreasing radiographic contrast is to:
lower the wavelength of the radiation used
Thin sheets of lead foil in contact with the movie throughout exposure boom the film density
due to the fact:
they emit electrons while uncovered to x and gamma radiation which assist darken the film
x-ray tubes are regularly closed in a shockproof casing so one can:
shield the operator from excessive-voltage shock
an x-ray tube is rated for a maximum of 250 kVp. This tube can be operated at a most of:
250,000 volts top voltage
a voltage selector along with an iron center transformer with a unmarried winding having a
sequence of faucets at various points on the winding is referred to as
an autotransformer
in x-ray radiography, alternating contemporary have to be changed to pulsating direct
modern in order to satisfy the want for unidirectional modern. This alteration may be
completed with the aid of:
rectifiers
when radiographing to the 2-2T excellent stage, an ASTM pentameter for a 2.5 inch steel
has a thickness of
50 mils
Valve tubes are used in x-ray system to:
Provide essential rectification.
A right cobalt-60 radiograph is made on a three inch steel casting using an exposure time of
10 mins and a source-to-film distance of 36 inches. It is important to trade the source-to-film
distance to 24 inches, what publicity time might produce a comparable radiograph if all other
conditions continue to be the equal ?
Four.4 minutes
