RT Level 1 Review |240 questions with
verified answers
"clearing time" refers to the time the film is in the stop bath Ans✓✓✓
false
a "radiation area" Ans✓✓✓ is defined as any area where a person could
receive a dose exceeding 5 mRem in any one hour
a co60 source has a half-life of Ans✓✓✓ 5.3 years
a densitometer is an instrument for measuring Ans✓✓✓ film density
a densitometer is an instrument for measuring the density of the test
object prior to performing radiographic testing Ans✓✓✓ false
A densitometer is:
A. a meter used to measure xray intensity
B. an instrument for measuring the film density
C. a meter used to measure the density of a material
D. a meter used to measure tube current Ans✓✓✓ B. an instrument for
measuring the film density
a film should always be exposed for at least a density of 1.0 Ans✓✓✓
false
,a filter is most effective when placed between the specimen and the film
Ans✓✓✓ false
a general rule often employed for determining the kilovoltage to be used
when x-raying a part is Ans✓✓✓ the kilovoltage should be as low as
other factors will permit
a general rule used to define the amount of radiation exposed that
excessive is Ans✓✓✓ any unnecessary exposure to radiation is
excessive
a given amount of radiation dose will have less effect on the body if the
exposure occurs gradually over a long period of time Ans✓✓✓ true
a graph showing the relation between material thickness, kilovoltage,
and exposure is called Ans✓✓✓ an exposure chart or technique chart
a high vacuum environment for an x-ray tube is to make it lighter for
easy transportation Ans✓✓✓ false
A large source size can be compensated for by: Ans✓✓✓ increasing the
source-to-specimen distance
a lead symbol 'IT' is attached to the back of the film holder to determine
Ans✓✓✓ whether excessive backscatter is present
,a major disadvantage of isotope radiography is the high cost of isotope
equipment and sources Ans✓✓✓ false
a penetrameter (or a image quality indicator, IQI) is used in radiography
to indicate Ans✓✓✓ radiographic film sensitivity
a pentrameter ( or an image quality indicator, IQI) is used in radiography
to indicate Ans✓✓✓ radiographic film sensitivity
a pentrameter is used to indicate Ans✓✓✓ the quality of the
radiographic technique
a photographic image recorded by the passage of x or gamma rays
through a specimen onto a film is called a Ans✓✓✓ radiograph
a section with a significan increase in thickness variation is required to
be shown on a single radiograph within a desired film density range. this
may be accomplished by Ans✓✓✓ increasing the kilovoltage
A sheet of lead with an opening cut in the shape of the part to be
radiographed may be used to decrease the effect of scattered radiation
which undercuts the specimens. Such a device is called: Ans✓✓✓ a
mask
, after a radioactive material is stored, its gamma radiation shuts off
Ans✓✓✓ false
after film has been exposed by the radiation and then developed, the area
of the film receiving the most radiation is Ans✓✓✓ darkest
an "ion" is a charged part of an atom that can have either a positive or
negative charge Ans✓✓✓ True
an advantage of radiography is that it reveals internal discontinuities
with access to only one side of the part being inspected Ans✓✓✓ false
an advantage of the pocket dosimeter type of ionization chamber used to
monitor radiation received by personnel is Ans✓✓✓ it provides an
immediate indication of dosage
an element is identified by the number of Ans✓✓✓ protons
an excellent radiography is obtained under given exposure conditions
with a tube current of 5 milliamperes and an exposure time of 12
minutes. if other conditions are not changed, what exposure time would
be required if the xray tube current could be raised to 10 milliamperes?
Ans✓✓✓ 6 minutes
an identification number of 25 on an ASME IQI shows a thickness of
0.025 inches Ans✓✓✓ true
verified answers
"clearing time" refers to the time the film is in the stop bath Ans✓✓✓
false
a "radiation area" Ans✓✓✓ is defined as any area where a person could
receive a dose exceeding 5 mRem in any one hour
a co60 source has a half-life of Ans✓✓✓ 5.3 years
a densitometer is an instrument for measuring Ans✓✓✓ film density
a densitometer is an instrument for measuring the density of the test
object prior to performing radiographic testing Ans✓✓✓ false
A densitometer is:
A. a meter used to measure xray intensity
B. an instrument for measuring the film density
C. a meter used to measure the density of a material
D. a meter used to measure tube current Ans✓✓✓ B. an instrument for
measuring the film density
a film should always be exposed for at least a density of 1.0 Ans✓✓✓
false
,a filter is most effective when placed between the specimen and the film
Ans✓✓✓ false
a general rule often employed for determining the kilovoltage to be used
when x-raying a part is Ans✓✓✓ the kilovoltage should be as low as
other factors will permit
a general rule used to define the amount of radiation exposed that
excessive is Ans✓✓✓ any unnecessary exposure to radiation is
excessive
a given amount of radiation dose will have less effect on the body if the
exposure occurs gradually over a long period of time Ans✓✓✓ true
a graph showing the relation between material thickness, kilovoltage,
and exposure is called Ans✓✓✓ an exposure chart or technique chart
a high vacuum environment for an x-ray tube is to make it lighter for
easy transportation Ans✓✓✓ false
A large source size can be compensated for by: Ans✓✓✓ increasing the
source-to-specimen distance
a lead symbol 'IT' is attached to the back of the film holder to determine
Ans✓✓✓ whether excessive backscatter is present
,a major disadvantage of isotope radiography is the high cost of isotope
equipment and sources Ans✓✓✓ false
a penetrameter (or a image quality indicator, IQI) is used in radiography
to indicate Ans✓✓✓ radiographic film sensitivity
a pentrameter ( or an image quality indicator, IQI) is used in radiography
to indicate Ans✓✓✓ radiographic film sensitivity
a pentrameter is used to indicate Ans✓✓✓ the quality of the
radiographic technique
a photographic image recorded by the passage of x or gamma rays
through a specimen onto a film is called a Ans✓✓✓ radiograph
a section with a significan increase in thickness variation is required to
be shown on a single radiograph within a desired film density range. this
may be accomplished by Ans✓✓✓ increasing the kilovoltage
A sheet of lead with an opening cut in the shape of the part to be
radiographed may be used to decrease the effect of scattered radiation
which undercuts the specimens. Such a device is called: Ans✓✓✓ a
mask
, after a radioactive material is stored, its gamma radiation shuts off
Ans✓✓✓ false
after film has been exposed by the radiation and then developed, the area
of the film receiving the most radiation is Ans✓✓✓ darkest
an "ion" is a charged part of an atom that can have either a positive or
negative charge Ans✓✓✓ True
an advantage of radiography is that it reveals internal discontinuities
with access to only one side of the part being inspected Ans✓✓✓ false
an advantage of the pocket dosimeter type of ionization chamber used to
monitor radiation received by personnel is Ans✓✓✓ it provides an
immediate indication of dosage
an element is identified by the number of Ans✓✓✓ protons
an excellent radiography is obtained under given exposure conditions
with a tube current of 5 milliamperes and an exposure time of 12
minutes. if other conditions are not changed, what exposure time would
be required if the xray tube current could be raised to 10 milliamperes?
Ans✓✓✓ 6 minutes
an identification number of 25 on an ASME IQI shows a thickness of
0.025 inches Ans✓✓✓ true
