IRRSP Test Questions Xray NDT/NDE
Questions & Answers
Specific emission Constant for Co60 is? - Answer-14R/Hr/ci @ 1ft
Specific emission Constant for
... [Show More] 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 ? - Answerin 1896 while investigating phosphorescence in uranium salts, he accidentally discovered radioactivity .
as he was investigating the work of Mr rontgen , Becquerel wrapped a fluorescent 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 radiographs
were achieved by a method called fishpoling - Answer-Early Gamma Radiography
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
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 maximum 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-Historically, 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 - Answerthe radiographer
Ernest Rutherford - Answer-Alpha particles were discovered by?
Massachusetts General - Answer-The first medical X ray was conducted at? [Show Less]