IRRSP Practice Test Questions with solutions 2024

IRRSP Practice Test Questions with solutions 2024 The activity of a radioactive source The term "Curie" defines: a. The exposure of a radioactive source b. The intensity of a radioactive source c. The activity of a radioactive source d. The output of a radioactive source Reddening of the skin, loss of hair, blistering Which of the following are symptoms of an acute extremity overexposure? a. Nausea, vomiting, diarrhea b. Fatigue, nausea, reddening of the skin c. Diarrhea, blistering, loss of hair d. Reddening of the skin, loss of hair, blistering Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:07 / 0:15 Full screen Higher gamma ray energy from the Co-60 The reason the gamma radiation emitted from a Cobalt-60 source is more penetrating than the gamma radiation emitted from Iridium-192 is due to the: a. Higher output per Curie from the Co-60 b. Longer half life of the Co-60 c. Greater intensity from the Co-60 d. Higher gamma ray energy from the Co-60 3/4 A 0.400 inch piece of lead shielding will reduce the radiation intensity from an Iridium-192 source by: a. 3/4 b. 1/2 c. 1/4 d. 1/8 Thick section of high atomic number material When shielding against high-energy gamma rays, which of the following characteristics provide the most effective shield? a. Thick section of material b. Thick section of high atomic number material c. Thick section of low atomic number material d. Thick section of low density material 2.31 R/hr The radiation intensity at 1 foot from an Iridium-192 source is 452.4 R/hr. What is the radiation intensity at 14 feet? a. 2.31 R/hr b. 226.2 R/hr c. 113.1 R/hr d. 32.3 R/hr C Gamma radiation can be defined as: (Answer with A, B, C, or D) a. Particles having the mass and charge of two protons and two neutrons emitted from the nucleus of an unstable atom b. Very light negatively charged particles emitted from the nucleus of an unstable atom c. Very short wavelength electromagnetic radiation emitted from the nucleus of an unstable atom d. Particles emitted from an unstable atom with an energy in the range of 1 to 10 M.E.V. Attenuation The term that describes how gamma or x-rays are reduced in intensity when passing through shielding material is: a. Penetration b. Scatter c. Reflection d. Attenuation 5 Rem to the whole body, 50 Rem to the extremities The annual radiation exposure limits for a radiographer or an assistant can be summarized by: a. 1.25 Rem to the whole body, 18.75 Rem to the extremities b. 20 Rem to the whole body, 200 Rem to the extremities c. 5 mRem to the whole body, 50 mRem to the extremities d. 5 Rem to the whole body, 50 Rem to the extremities 3.125 Curies A 50 Curie Cobalt-60 source has decayed 4 half lives. What is the remaining activity? a. 6.25 Curies b. 3.125 Curies c. 0.195 Curies d. 1.56 Curies Inverse Square Law The radiation intensity from a point source is inversely proportional to the square of the distance from the source. This is known as: a. Inverse Square Law b. Linear Absorption Coefficient c. Photoelectric Attenuation Process d. Ohm's Law Half value layer The thickness of shielding material required to reduce a radiation intensity to one-half it's original value is known as the: a. Tenth value layer b. Half life c. Roentgen value layer d. Half value layer Protons An element is identified by the number of _______ in it's nucleus. a. Photons b. Neutrons c. Electrons d. Protons Time, distance, shielding and ALARA considerations What basic methods should a radiographer use to control exposure to radiation? a. Half life, shielding and distance b. Alarm rate meters, shielding and distance c. Shielding, film badges and distance d. Time, distance, shielding and ALARA considerations 64.5 feet and 456.1 feet Using an unshielded 80 Curie Iridium-192 source, at what distances should the "High Radiation Area" and the "Restricted Area" boundaries be placed? a. 64.5 feet and 288.4 feet b. 2.04 feet and 144.2 feet c. 105.8 feet and 748.3 feet d. 64.5 feet and 456.1 feet B "Saturation" of a Geiger Muller survey instrument refers to: (Answer with A, B, C, or D) a. A meter that malfunctions as a result of being water logged b. A survey meter that indicates a false zero reading when exposed to a high radiation intensity c. A meter that will not work on Saturdays d. A meter that is damaged 189.1 feet An Iridium-192 source that was originally 110 Curies has decayed for 222 days. At what distance from the source should a radiographer place the "Restricted Area" boundary? a. 189.1 feet b. 411.1 feet c. 119.6 feet d. 534.8 feet Ionization Radiation detection instruments measure exposure to radiation based on the principal of: a. The inverse square law b. Mitosis c. Attenuation d. Ionization D Before the first radiographic exposure, a radiographer performs a reference survey of his exposure device containing 100 Curies of Iridium-192. During this survey, he observes a zero reading on his survey meter. The radiographer should: (Answer with A, B, C, or D) a. Proceed with radiographic operations as a zero reading indicates a safe radiation level b. Assume the exposure device is empty based on the survey c. Expose the source and perform more surveys to confirm the survey meter responds d. Assume the survey meter is not working properly. The exposure device must be surveyed with another survey meter C A radiographer discovers that his pocket dosimeter is "off scale" during a lunch break. The radiographer should: (Answer with A, B, C, or D) a. Obtain a replacement pocket dosimeter before returning to work b. Assume that he bumped the pocket dosimeter while working and continue radiographic operations c. Immediately stop all work with radiation, notify the RSO or designee and send the film badge or TLD out for emergency processing within 24 hours d. Re-zero the pocket dosimeter before returning to work C By regulations, survey meters that are utilized in radiographic operations must be capable of measuring a range of: (Answer with A, B, C, or D) a. 10 mR/hr-1000 mR/hr b. 0 mR/hr-500 mR/hr c. 2 mR/hr-1000 mR/hr d. 5 mR/hr-1 R/hr C Which of the following describes the information that must be included on a utilization log? (Answer with A, B, C, or D) a. Name of radiographer, dosimeter readings, survey meter serial number, location used b. Make and model of the exposure device, dosimeter readings, location of use, number of radiographic exposures c. Identity and signature of the radiographers, date the equipment was used including the dates removed and returned to storage, make and model, serial number of the device, location or site of use d. Location or site of use, the distance to the Restricted area boundary, make and model of the exposure device, names of the radiographers 3 months Formal inspection and maintenance of radiographic exposure devices and associated equipment must be performed every: a. 1 month b. 3 months c. 6 months d. 12 months 2 mR/hr, 100 mR/yr The "Restricted Area" boundary is established where the exposure could exceed: a. 5 mR/hr, 500 mR/yr b. 2 mR/hr, 100 mR/yr c. 2 mR/hr, 100 mR in 7 consecutive days, 500 mR/hr d. 100 mR/yr 100 mR/hr The "High Radiation Area" boundary is established where the exposure could exceed: a. 500 mR/hr b. 100 mR/hr c. 5 mR/hr d. 2 mR/hr