MMET-402 FINAL EXAM REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
When radiographing to the 2-2T quality level, an ASTM penetrameter for 13 mm (0.5 in.) thick 2024
aluminum alloy has a thickness of:
a. 13 mm (0.5 in.)
b. 5 x 10^-5 m (2 mils)
c. 13 x 10^-5 m (10 mils)
d. 25 x 10^-5 m (10 mils) - (answer)d
The penetrating ability of an x-ray beam is governed by:
a. kilovoltage
b. time
c. milliamperage
d. source-to-IP distance - (answer)a
The ability to detect a small discontinuity or flaw is called:
a.radiographic contrast
b.radiographic sensitivity
c.radiographic density
d.radiographic resolution - (answer)b
The difference between the densities of two areas of a radiograph is called:
a.radiographic contrast
b.subject contrast
c.IP contrast
d.definition - (answer)a
In order to decrease geometric unsharpness:
,MMET-402 FINAL EXAM REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
a. radiation should proceed from as small a focal spot as other considerations will allow
b. radiation should proceed from as large a focal spot as other considerations will allow
c. the IP should be as far as possible from the object being radiographed
d. the distance from the anode to the material examined should be as small as is practical - (answer)a
A general rule often employed for determining the kilovoltage to be used when X-raying a part is that:
a. the kilovoltage should be as high as other factors will permit
b. the kilovoltage should be as low as other factors will permit
c. the kilovoltage is always a fixed value and cannot be changed
d. the kilovoltage is not an important variable and can be changed over a wide range without affecting
the radiograph - (answer)b
If an exposure time of 60 seconds was necessary using a 1.2 m (4 ft) source-to-IP distance for a
particular
exposure, what time would be necessary if a 0.6 m(2 ft) source-to-IP distance is used and all other
variables remain
the same?
a. 120 s
b. 30 s
c. 15 s
d. 240 s - (answer)c
One of the general rules concerning the application of geometric principles of shadow formation to
radiography is:
,MMET-402 FINAL EXAM REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
a. the X-rays should proceed from as large a focal spot as other considerations will allow
b. the IP should be as far as possible from the object being radiographed
c. the distance between the source and the material examined should always be as great as possible
d. all of the above - (answer)c
Kilovoltage, exposure time, and source-to-IP distance are three of the most important X-ray exposure
factors that
can be controlled. A fourth such exposure factor is:
a. focal point size
b. temperature
c. filament-to-focal spot distance
d. milliamperage - (answer)d
The most common material used to provide protection against X-rays is:
a. high-density brick
b. an alloy of 70 percent steel and 30 percent copper
c. tungsten
d. lead - (answer)d
When producing radiographs, if the kilovoltage is increased, the:
a. subject contrast decreases
b. IP contrast decreases
c. subject contrast increases
, MMET-402 FINAL EXAM REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
d. IP contrast increases - (answer)a
An unshielded isotope source gives a dosage rate of 900 mR/h at 3 m (10 ft). What would the unshielded
dosage
rate be at 9 m (30 ft)?
a. 300 mR/hr
b. 600 mR/hr
c. 100 mR/hr
d. 2700 mR/hr - (answer)c
The lead symbol "B" is attached to the back of the IP holder to determine:
a. sensitivity
b. whether excessive backscatter is present
c. radiographic contrast
d. density - (answer)b
The image of the required penetrameter and hole on the radiograph indicates that the radiograph has
the
required:
a. contrast
b. definition
c. sensitivity
d. latitude - (answer)c
When radiographing to the 2-2T quality level, an ASTM penetrameter for 13 mm (0.5 in.) thick 2024
aluminum alloy has a thickness of:
a. 13 mm (0.5 in.)
b. 5 x 10^-5 m (2 mils)
c. 13 x 10^-5 m (10 mils)
d. 25 x 10^-5 m (10 mils) - (answer)d
The penetrating ability of an x-ray beam is governed by:
a. kilovoltage
b. time
c. milliamperage
d. source-to-IP distance - (answer)a
The ability to detect a small discontinuity or flaw is called:
a.radiographic contrast
b.radiographic sensitivity
c.radiographic density
d.radiographic resolution - (answer)b
The difference between the densities of two areas of a radiograph is called:
a.radiographic contrast
b.subject contrast
c.IP contrast
d.definition - (answer)a
In order to decrease geometric unsharpness:
,MMET-402 FINAL EXAM REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
a. radiation should proceed from as small a focal spot as other considerations will allow
b. radiation should proceed from as large a focal spot as other considerations will allow
c. the IP should be as far as possible from the object being radiographed
d. the distance from the anode to the material examined should be as small as is practical - (answer)a
A general rule often employed for determining the kilovoltage to be used when X-raying a part is that:
a. the kilovoltage should be as high as other factors will permit
b. the kilovoltage should be as low as other factors will permit
c. the kilovoltage is always a fixed value and cannot be changed
d. the kilovoltage is not an important variable and can be changed over a wide range without affecting
the radiograph - (answer)b
If an exposure time of 60 seconds was necessary using a 1.2 m (4 ft) source-to-IP distance for a
particular
exposure, what time would be necessary if a 0.6 m(2 ft) source-to-IP distance is used and all other
variables remain
the same?
a. 120 s
b. 30 s
c. 15 s
d. 240 s - (answer)c
One of the general rules concerning the application of geometric principles of shadow formation to
radiography is:
,MMET-402 FINAL EXAM REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
a. the X-rays should proceed from as large a focal spot as other considerations will allow
b. the IP should be as far as possible from the object being radiographed
c. the distance between the source and the material examined should always be as great as possible
d. all of the above - (answer)c
Kilovoltage, exposure time, and source-to-IP distance are three of the most important X-ray exposure
factors that
can be controlled. A fourth such exposure factor is:
a. focal point size
b. temperature
c. filament-to-focal spot distance
d. milliamperage - (answer)d
The most common material used to provide protection against X-rays is:
a. high-density brick
b. an alloy of 70 percent steel and 30 percent copper
c. tungsten
d. lead - (answer)d
When producing radiographs, if the kilovoltage is increased, the:
a. subject contrast decreases
b. IP contrast decreases
c. subject contrast increases
, MMET-402 FINAL EXAM REVIEW QUESTIONS & ANSWERS RATED 100% CORRECT!!
d. IP contrast increases - (answer)a
An unshielded isotope source gives a dosage rate of 900 mR/h at 3 m (10 ft). What would the unshielded
dosage
rate be at 9 m (30 ft)?
a. 300 mR/hr
b. 600 mR/hr
c. 100 mR/hr
d. 2700 mR/hr - (answer)c
The lead symbol "B" is attached to the back of the IP holder to determine:
a. sensitivity
b. whether excessive backscatter is present
c. radiographic contrast
d. density - (answer)b
The image of the required penetrameter and hole on the radiograph indicates that the radiograph has
the
required:
a. contrast
b. definition
c. sensitivity
d. latitude - (answer)c
