ASNT Industrial Radiography Radiation Safety Questions And Answers 100% Correct

ASNT Industrial Radiography Radiation Safety Questions And Answers 100% Correct In the early years of radiography, what caused personnel to be overexposed? - Poor equipment design, lack of understanding, lack of and poor safety practices. In what year did Marie Curie discover radium? - Late 1898 Who coined the term radioactivity? - Marie and Pierre Curie In the early years of radiography from 1920 -1930, the maximum thickness that could be inspected via X-radiation was of steel? - 3" (7.62 cm) Historically, it has been proven that the predominant cause of overexposures is: - Improper surveys, the source being left in an uncontrolled state, the source not being locked once retracted to the shielded position The responsibility to adhere to the regulations, license conditions and company policies fal ls to: - The radiographer Alpha particles were discovered by: - Henri Becquerel The first medical X -ray was conducted at: - Massachusetts General Regulations from one state to the next are essentially the me for radioactive materials - True A radiograp her has several avenues to seek guidance and counsel. The first person he or she can turn to is? - their program's radiation safety officer (RSO) The origins of industrial radiography can be attributed to: - Wilhelm Rontgen The two basic types of radiati on 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 light, which is: - 186 000 miles/s (299 338 km/s) Matter can be turned into energy. - True Alpha particles are much like a helium nucleus as they have: - two protons, two neutrons and two electrons Beta particles have a/an: - Negative charge Alpha particles have a/an: - Positive charge Beta particles have a mass: - much less than that of an alpha particle In modern radiography the alpha and beta particles are of little concern because: - They travel at sub-light speeds and as such are easily ontained or shielded X-radiation is created by applying a: - high voltage direct current acros s 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 target Radio waves, microwaves and infrared waves are types of: - Nonionizing radiation The neutron has an atomic mass of: - 1 AMU · The shorter the wavelength or higher the frequency, the greater the penetration; as such: - primary beams have greater penetrability than secondary beams Elementary particles with a unit negative electrical charge and a mass approximately equal to 1/1840 that of - Electrons The atomic weight of an atom is the combination of the total number of protons and neutrons held in the nucleus. This is also known as the: - "A" number Gamma rays are affected by magnetic fields. - False As a radioisotope decays, the elements return to a stab' state by undergoing several steps; once complete the material continues to produce radiation: - false After 148 days, Ir -192 would have undergone how m half lives? - 2 Activation is the process of bombarding material with: - excess neutrons The total number of _________ identifies an element. - protons Gamma radiation has a shorter wavelength than visible light, therefore mak ing it: - More penetrating Overexposures to personnel can result in: - cancer, genetic defects carried into further generations, and death All radiation exposures are equally serious and can result - False Ionizing radiation passes through the entire bo dy; as such, damage can occur to the: - skin, internal organs and muscles