ASNT RT 2 Basic Exam Questions With
100% Verified Correct Answers.
one method of reducing radiographic contrast is to:
decrease the wavelength of the radiation used
thin sheets of lead foil in intimate contact with x-ray film during exposure increases film
density because they:
emit electrons when exposed to x- and gamma radiation which help darken the film
x-ray tubes are often closed in a shockproof casing in order to:
protect the operator from high- voltage shock
an x-ray tube is rated for a maximum of 250 kVp. this tube may be operated at a maximum
of:
250,000 V peak voltage
a voltage selector consisting of an iron core transformer with a single winding having
a series of taps at various points on the winding is called:
an autotransformer
in x-ray radiography, alternating current must be changed to pulsating direct current in
order to satisfy the need for unidirectional current. this change may be accomplished by:
cathodes
value tubes are used in x-ray equipment to:
provide cessary rectification
when sharp, black, bird- foot shaped marks which are known not to correspond with
any discontinuities appear at random on radiographs, they are probably caused by:
, static charges caused by friction
the adjustment of tube current in conventional x-ray tube circuits is made by:
adjusting the filament heating current
in comparison with lower-voltage radiographs, high- energy radiographs show:
greater latitude
filters used at the port of the x-ray tube:
filter out "soft" radiation to provide a more homogenous x-ray beam
filters are placed between the x-ray tube and specimen tend to reduce scatter radiation
undercutting the specimen by:
absorbing the longer wavelength components of the primary beam
besides serving as a filter, screens of high atomic numbers, such as lead and lead antimony,
also:
provide some image intensifying action
the range of thickness over which densities are obtained that are satisfactory
for interpretation is measured of the:
latitude of a radiograph
almost all gamma radiography is performed with which type of isotopes?
Ir- 192 or Co- 60
the amount of unsharpness or blurring of a radiograph is:
directly proportional to the size of the focal spot and inversely proportional to the source-
to-object distance
images of discontinuities close to the source side of the specimen become less clearly defined
as:
the thickness of the specimen increases
100% Verified Correct Answers.
one method of reducing radiographic contrast is to:
decrease the wavelength of the radiation used
thin sheets of lead foil in intimate contact with x-ray film during exposure increases film
density because they:
emit electrons when exposed to x- and gamma radiation which help darken the film
x-ray tubes are often closed in a shockproof casing in order to:
protect the operator from high- voltage shock
an x-ray tube is rated for a maximum of 250 kVp. this tube may be operated at a maximum
of:
250,000 V peak voltage
a voltage selector consisting of an iron core transformer with a single winding having
a series of taps at various points on the winding is called:
an autotransformer
in x-ray radiography, alternating current must be changed to pulsating direct current in
order to satisfy the need for unidirectional current. this change may be accomplished by:
cathodes
value tubes are used in x-ray equipment to:
provide cessary rectification
when sharp, black, bird- foot shaped marks which are known not to correspond with
any discontinuities appear at random on radiographs, they are probably caused by:
, static charges caused by friction
the adjustment of tube current in conventional x-ray tube circuits is made by:
adjusting the filament heating current
in comparison with lower-voltage radiographs, high- energy radiographs show:
greater latitude
filters used at the port of the x-ray tube:
filter out "soft" radiation to provide a more homogenous x-ray beam
filters are placed between the x-ray tube and specimen tend to reduce scatter radiation
undercutting the specimen by:
absorbing the longer wavelength components of the primary beam
besides serving as a filter, screens of high atomic numbers, such as lead and lead antimony,
also:
provide some image intensifying action
the range of thickness over which densities are obtained that are satisfactory
for interpretation is measured of the:
latitude of a radiograph
almost all gamma radiography is performed with which type of isotopes?
Ir- 192 or Co- 60
the amount of unsharpness or blurring of a radiograph is:
directly proportional to the size of the focal spot and inversely proportional to the source-
to-object distance
images of discontinuities close to the source side of the specimen become less clearly defined
as:
the thickness of the specimen increases
