ASNT IRRSP XRAY EXAM|QUESTIONS AND VERIFIED AN-
SWERS|GRADED A+|PASS ON FIRST ATTEMPT|BRAND NEW
2026/2027 UPDATE!!!!!
Specific emission Constant for Co60 is? - ANSWER 14R/Hr/ci @ 1ft
Specific emission Constant for Ir192 is? - ANSWER 5.2 R/Hr/ci @ 1ft
What is the Half Life for Ir192? - ANSWER 74 days
What is the Half life for co60 ? - ANSWER 5.3 years
In the beginning of Radiography, Wilhelm Conrad Rontgen scientist won the Nobel prize and
how did he get to do this ? - ANSWER
in 1896 while investigating phosphorescence in uranium salts, he accidentally discovered ra-
dioactivity . as he was investigating the work of Mr rontgen , Becquerel wrapped a fluores-
cent substance , potassium - ANSWER Henri Becquerel 1852-1908
gamma radiography got its start in the united states in 1929 at a naval research laboratory.
the navy wanted a method to inspect think steel casting , but x ray available at the time were
limited to 3 in"
using radium it was possible to inspaect thhinknesse in the range of 10" in to12" in these ra-
diographs were achieved by a method called fishpoling - ANSWER Early Gamma Radiog-
raphy
fishpoling required a radiographer to hold a weak radium source to a long rod for the time
length of the exposure, or to prop the fishpole through a rig to hold it steady. - ANSWER
Fishpoling
1
, manufactured gamma-ray sources and cobalt become available in what year ? - ANSWER
1946 .
Ernest Rutherford - ANSWER Alpha particles were discovered by
?
poor equipment design,
lack of understanding,
lack of poor safety practices. - ANSWER in the early years of radiography, what caused
personnel to be overexposed?
late in 1898. - ANSWER in what year did Marie Curie discover radium?
Marie and Pierre Curie - ANSWER Who coined the term radioactivity?
3" in. (7.62 cm) - ANSWER In the early years of radiography from 1920-1930, the maxi-
mum thickness that could be inspected via X-radiation was__________ of steel?
-improper surveys
-the source being left in an uncontrolled state
-the source not being locked once retracted to the shielded position - ANSWER Histori-
cally, it has been proven that the predominant cause of overexposures is?
the responsibility to adhere to the regulations, license conditions and company policies falls
to - ANSWER the radiographer
Ernest Rutherford - ANSWER Alpha particles were discovered by?
2
SWERS|GRADED A+|PASS ON FIRST ATTEMPT|BRAND NEW
2026/2027 UPDATE!!!!!
Specific emission Constant for Co60 is? - ANSWER 14R/Hr/ci @ 1ft
Specific emission Constant for Ir192 is? - ANSWER 5.2 R/Hr/ci @ 1ft
What is the Half Life for Ir192? - ANSWER 74 days
What is the Half life for co60 ? - ANSWER 5.3 years
In the beginning of Radiography, Wilhelm Conrad Rontgen scientist won the Nobel prize and
how did he get to do this ? - ANSWER
in 1896 while investigating phosphorescence in uranium salts, he accidentally discovered ra-
dioactivity . as he was investigating the work of Mr rontgen , Becquerel wrapped a fluores-
cent substance , potassium - ANSWER Henri Becquerel 1852-1908
gamma radiography got its start in the united states in 1929 at a naval research laboratory.
the navy wanted a method to inspect think steel casting , but x ray available at the time were
limited to 3 in"
using radium it was possible to inspaect thhinknesse in the range of 10" in to12" in these ra-
diographs were achieved by a method called fishpoling - ANSWER Early Gamma Radiog-
raphy
fishpoling required a radiographer to hold a weak radium source to a long rod for the time
length of the exposure, or to prop the fishpole through a rig to hold it steady. - ANSWER
Fishpoling
1
, manufactured gamma-ray sources and cobalt become available in what year ? - ANSWER
1946 .
Ernest Rutherford - ANSWER Alpha particles were discovered by
?
poor equipment design,
lack of understanding,
lack of poor safety practices. - ANSWER in the early years of radiography, what caused
personnel to be overexposed?
late in 1898. - ANSWER in what year did Marie Curie discover radium?
Marie and Pierre Curie - ANSWER Who coined the term radioactivity?
3" in. (7.62 cm) - ANSWER In the early years of radiography from 1920-1930, the maxi-
mum thickness that could be inspected via X-radiation was__________ of steel?
-improper surveys
-the source being left in an uncontrolled state
-the source not being locked once retracted to the shielded position - ANSWER Histori-
cally, it has been proven that the predominant cause of overexposures is?
the responsibility to adhere to the regulations, license conditions and company policies falls
to - ANSWER the radiographer
Ernest Rutherford - ANSWER Alpha particles were discovered by?
2
