40 HR RADIATION SAFETY 2025 EXAM QUESTIONS AND VERIFIED ANSWERS

In the early years of radiography what caused personnel to be exposed? - All the above In what year did Marie Curie die? - late in 1898 Who coined the term radioactivity? - Marie and Pierre Curie In the early years of radiography from , the maximum thickness that could be inspected via X-radiation was of steel? - 3 in ( 7.62 ) Historically, it has been proven the predominant cause of overexposure is - All the above The responsibility to adhere to the regulations, license conditions and company policies falls to: - All radiation workers Alpha particles were discovered by - Ernest Rutherford The first medical X-Ray was conducted at - Massachusetts General Regulations from one state to the next are essentially the same? - True The origins of industrial radiography can be attributed to: - Wilhem Rontgen A radiographer has several avenues to seek guidance and counsel. The first person he should turn to is? - The RSO The two basic types of radiation are? - particulate and electromagnetic Wavelike radiation travels at: - at the speed of light without regard to pressure, temperature or magnetic fields Gamma rays travel in a wavelike motion at the speed of? - 186,000 miles/s Matter can be turned into energy? - True Alpha particles are much like helium nucleus as they have? - 2 protons and 2 neutrons Alpha particles have a/an - Positive charge Beta particles have a/an - negative charge Beta particles have a mass: - much less than that of an alpha particle In modern radiography the alpha particle and beta particles are of little concern because? - They travel at sub-light speeds and as such easily contained or shielded X-radiation is created by applying - high voltage direct current across the cathode of a vacuum tube X-rays are produced by an x-ray tube by the: - passage of electrons across the tube striking the