ASNT LEVEL I COMPLETE QUESTIONS WITH
CORRECT AND DETAILED ANSWERS ALREADY
A+ GRADED
Although there may be other reasons for using calcium
tungstate screens in industrial radiography, they are
most often used to:
a. improve definition and resolution in radiographic
images.
b. improve contrast in radiographic images.
c. decrease exposure time.
d. make films respond to multimillion volt radiation.
ANSWER-c. decrease exposure time.
An excellent radiograph is obtained under given
conditions of exposure with the film located at a distance
of 36 in. (914.4 mm) from the target of the X-ray tube. If
the film is now placed only 18 in. (457.2 mm) from the
,target, and all exposure conditions except time are held
constant, the new exposure time will be:
a. unchanged.
b. longer by approximately 80%.
c. shorter by approximately 55%.
d. only about 25% as long as the original exposure time.
ANSWER-d. only about 25% as long as the original
exposure time.
An excellent radiograph is obtained under given
exposure conditions with a tube current of 5 mA and an
exposure time of 12 min. If other conditions are not
changed, what exposure time would be required if the X-
ray tube current could be raised to 10 mA?
a. 24 min
b. 12 min
c. 6 min
d. 3 min
ANSWER-c. 6 min
,In film radiography, image quality indicators (IQIs) are
usually placed:
a. between the intensifying screen and the film.
b. on the source side of the test object.
c. on the film side of the test object.
d. between the operator and the radiation source.
ANSWER-b. on the source side of the test object.
When radiographing to the 2-2T quality level, an ASTM
IQI for 0.5 in. (12.7 mm) thick 2024 aluminum alloy has a
thickness of:
a. 0.5 in. (12.7 mm)
b. 0.002 in. (0.051 mm)
c. 0.005 in. (0.127 mm)
d. 0.010 in. (0.254 mm)
ANSWER-d. 0.010 in. (0.254 mm)
, The penetrating ability of an X-ray beam is governed by:
a. kilovoltage.
b. time.
c. milliamperage.
d. source-to-film distance
ANSWER-a. kilovoltage.
Co-60 used in nondestructive testing emits:
a. alpha particles.
b. neutrons.
c. gamma rays.
d. X-rays.
ANSWER-c. gamma rays.
A densitometer is an instrument for measuring:
CORRECT AND DETAILED ANSWERS ALREADY
A+ GRADED
Although there may be other reasons for using calcium
tungstate screens in industrial radiography, they are
most often used to:
a. improve definition and resolution in radiographic
images.
b. improve contrast in radiographic images.
c. decrease exposure time.
d. make films respond to multimillion volt radiation.
ANSWER-c. decrease exposure time.
An excellent radiograph is obtained under given
conditions of exposure with the film located at a distance
of 36 in. (914.4 mm) from the target of the X-ray tube. If
the film is now placed only 18 in. (457.2 mm) from the
,target, and all exposure conditions except time are held
constant, the new exposure time will be:
a. unchanged.
b. longer by approximately 80%.
c. shorter by approximately 55%.
d. only about 25% as long as the original exposure time.
ANSWER-d. only about 25% as long as the original
exposure time.
An excellent radiograph is obtained under given
exposure conditions with a tube current of 5 mA and an
exposure time of 12 min. If other conditions are not
changed, what exposure time would be required if the X-
ray tube current could be raised to 10 mA?
a. 24 min
b. 12 min
c. 6 min
d. 3 min
ANSWER-c. 6 min
,In film radiography, image quality indicators (IQIs) are
usually placed:
a. between the intensifying screen and the film.
b. on the source side of the test object.
c. on the film side of the test object.
d. between the operator and the radiation source.
ANSWER-b. on the source side of the test object.
When radiographing to the 2-2T quality level, an ASTM
IQI for 0.5 in. (12.7 mm) thick 2024 aluminum alloy has a
thickness of:
a. 0.5 in. (12.7 mm)
b. 0.002 in. (0.051 mm)
c. 0.005 in. (0.127 mm)
d. 0.010 in. (0.254 mm)
ANSWER-d. 0.010 in. (0.254 mm)
, The penetrating ability of an X-ray beam is governed by:
a. kilovoltage.
b. time.
c. milliamperage.
d. source-to-film distance
ANSWER-a. kilovoltage.
Co-60 used in nondestructive testing emits:
a. alpha particles.
b. neutrons.
c. gamma rays.
d. X-rays.
ANSWER-c. gamma rays.
A densitometer is an instrument for measuring:
