IRRSP Test Questions X-ray NDT/NDE EXAM 2025-2026 ACTUAL
EXAM COMPLETE QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) /ALREADY GRADED A+
Specific emission Constant for Co60
14R/Hr/ci @ 1ft
is?
Specific emission Constant for Ir192
5.2 R/Hr/ci @ 1ft
is?
What is the Half Life for Ir192? 74 days
What is the Half life for co60 ? 5.3 years
in 1896 while investigating phosphorescence in
In the beginning of Radiography,
uranium salts, he accidentally discovered
Wilhelm Conrad Rontgen scientist
radioactivity . as he was investigating the work of
won the Nobel prize and how did he
Mr rontgen , Becquerel wrapped a fluorescent
get to do this ?
substance , potassium
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
Henri Becquerel 1852-1908
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
radiographs were achieved by a method called
fishpoling
fishpoling required a radiographer to hold a weak
radium source to a long rod for the time length of
Early Gamma Radiography
the exposure, or to prop the fishpole through a
rig to hold it steady.
manufactured gamma-ray sources and cobalt
Fishpoling
become available in what year ?
1946 . Ernest Rutherford
poor equipment design,
Alpha particles were discovered by
lack of understanding,
?
lack of poor safety practices.
in the early years of radiography,
what caused personnel to be late in 1898.
overexposed?
in what year did Marie Curie
Marie and Pierre Curie
discover radium?
Who coined the term radioactivity? 3" in. (7.62 cm)
EXAM COMPLETE QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) /ALREADY GRADED A+
Specific emission Constant for Co60
14R/Hr/ci @ 1ft
is?
Specific emission Constant for Ir192
5.2 R/Hr/ci @ 1ft
is?
What is the Half Life for Ir192? 74 days
What is the Half life for co60 ? 5.3 years
in 1896 while investigating phosphorescence in
In the beginning of Radiography,
uranium salts, he accidentally discovered
Wilhelm Conrad Rontgen scientist
radioactivity . as he was investigating the work of
won the Nobel prize and how did he
Mr rontgen , Becquerel wrapped a fluorescent
get to do this ?
substance , potassium
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
Henri Becquerel 1852-1908
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
radiographs were achieved by a method called
fishpoling
fishpoling required a radiographer to hold a weak
radium source to a long rod for the time length of
Early Gamma Radiography
the exposure, or to prop the fishpole through a
rig to hold it steady.
manufactured gamma-ray sources and cobalt
Fishpoling
become available in what year ?
1946 . Ernest Rutherford
poor equipment design,
Alpha particles were discovered by
lack of understanding,
?
lack of poor safety practices.
in the early years of radiography,
what caused personnel to be late in 1898.
overexposed?
in what year did Marie Curie
Marie and Pierre Curie
discover radium?
Who coined the term radioactivity? 3" in. (7.62 cm)
