IRRSP Test Questions Xray NDT/NDE Questions & Answers

IRRSP Test Questions Xray NDT/NDE Questions & Answers 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 ? - 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 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 , 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?