1 The operation of personnel radiation monitoring devices can depend on which of the following? Ionization Luminescence Thermoluminescence A1 only B1 and 2 only C2 and 3 only D 1, 2, and 3 2 What is the established annual occupational dose-equivalent limit for the lens of the eye?A10 mSv B50 mSv C150 mSv D 250 mSv 3 Which of the following is an acceptable approximate entrance skin exposure (ESE) for a PA chest radiograph?A6 mR B20 mR C38 mR D 0.6 R 4 Medical and dental radiation accounts for what percentage of the general public's exposure to human-made radiation?A10% B50% C80% D 95% 5 The operation of personal radiation monitoring can be based on stimulated luminescence. Which of the following personal radiation monitors function(s) in that manner? OSL dosimeter TLD Pocket dosimeter A1 only B1 and 2 only C1 and 3 only D 1, 2, and 3 6 Which of the following is (are) included in whole-body dose equivalents? Gonads Lens Extremities A1 only B1 and 2 only C2 and 3 only D 1, 2, and 3 7 Which of the following exposures would most likely deliver the greatest dose to the thyroid?AAP skull BPA skull CPA esophagus D PA chest 8 The control dosimeter that comes from the monitoring company should beAstored in a radiation-free area Bkept in a designated control booth Ckept in the film-processing area D used as an extra badge for new personnel A stored in a radiation-free area 9 Which unit of exposure is described as 100 ergs of energy per gram of irradiated absorber?Aroentgen Brad Crem D curie 10 The annual dose limit for occupationally exposed individuals is valid forAalpha, beta, and x-radiations. Bx- and gamma radiations only. Cbeta, x-, and gamma radiations. D all ionizing radiations. C beta, x-, and gamma radiations. 11 The tabletop exposure rate during fluoroscopy shall not exceedA5 mR/min B10 R/min C10 mR/h D 5 R/h 12 Personal radiation monitor reports must include which of the following information? Dose equivalents for report period Dosimeter type Radiation quality A1 only B1 and 2 only C2 and 3 only D 1, 2, and 3 13 According to the NCRP, the pregnant radiographer's gestational dose-equivalent limit for a 1-month period isA1 mSv B5 mSv C0.1 mSv D 0.5 mSv 14 Which of the following is a measurement of dose to biologic tissue?ARoentgen (C/kg) BRad (Gy) CRem (Sv) D RBE 15 If the exposure rate to a body standing 5 feet from a radiation source is 10 mR/min, what will be the dose to that body at a distance of 8 feet from the source?A25.6 mR/min B16 mR/min C6.25 mR/min D 3.9 mR/min 16 The annual dose limit for medical imaging personnel includes radiation from occupational exposure background radiation medical x-rays A1 only B1 and 2 only C2 and 3 only D 1, 2, and 3 17 A dose of 25 rad to the fetus during the seventh or eighth week of pregnancy is likely to cause which of the following?ASpontaneous abortion BSkeletal anomalies CNeurologic anomalies D Organogenesis 18 All the following statements regarding TLDs are true exceptATLDs are reusable Ba TLD is a personal radiation monitor CTLDs use a lithium fluoride phosphor D after x-ray exposure, TLDs emit heat in response to stimulation by light D 19 A thermoluminescent dosimetry system would use which of the following crystals?ASilver halide BSodium thiosulfate CLithium fluoride D Aluminum oxide 20 Which of the following is (are) acceptable way(s) to monitor the radiation exposure of those who are occupationally employed? TLD OSL dosimeter Quarterly blood cell count A1 only B1 and 2 only C1 and 3 only D 1, 2, and 3 21 Filters are an important component of film badges. Their function is toAdecrease exposure to the user. Bidentify the quality of radiation exposure. Creduce film fog. D increase film sensitivity. B identify the quality of radiation exposure. 22 It is recommended that a thermoluminescent dosimeter (TLD) or film badge be wornAunder the lead apron at waist level Boutside the lead apron at waist level Cunder the lead apron at collar level D outside the lead apron at collar level D outside the lead apron at collar level 23 An optically stimulated luminescence dosimeter contains which of the following detectors?AGadolinium BAluminum oxide CLithium fluoride D Photographic film 24 Which of the following radiologic examinations would deliver the greatest ESE?AChest BSkull CAbdomen D Thoracic spine 25 Which of the following is recommended for the pregnant radiographer?AChange dosimeters weekly. BWear a second dosimeter under the lead apron. CWear two dosimeters and switch their positions appropriately. D The pregnant radiographer must leave radiation areas for duration of the pregnancy. B Wear a second dosimeter under the lead apron. 26 The rad may be described asAdisintegrations per second. Bions produced in air. Cenergy deposited in an absorber. D biologic effects. C energy deposited in an absorber. 27 Types of secondary radiation barriers include the control booth lead aprons the x-ray tube housing A2 only B1 and 2 only C2 and 3 only D 1, 2, and 3 28 A dose of 25 rad to the fetus during the fourth or fifth week of pregnancy is more likely to cause which of the following:ASpontaneous abortion Bskeletal anomalies Cneurologic anomalies D organogenesis 29 Which of the following statements regarding film badges is (are) correct?1. Film badges should be read quarterly.2. Film badges must not leave the workplace.3. Film badges measure quantity and quality of radiation exposure.A1 only B1 and 2 only C2 and 3 only D 1, 2, and 3 30 The person responsible for ascertaining that all radiation guidelines are adhered to and that personnel understand and employ radiation safety measures is theAradiology department manager Bradiation safety officer Cchief radiologist D chief technologist B radiation safety officer 31 What unit of measure is used to express ionizing radiation dose to biologic material?ARoentgen (C/kg) BRad (Gy) CRem (Sv) D RBE 32 Which of the following personnel monitoring devices used in diagnostic radiography is considered to be the most sensitive and accurate?ATLD BFilm badge COSL dosimeter D Pocket dosimeter 33 The National Council on Radiation Protection and Measurements (NCRP) has recommended what total equivalent dose limit to the embryo/fetus?A0.5 mSv B5.0 mSv C50 mSv D 500 mSv 34 The rad is the unit ofAradiation dose. Bexposure. Cdose equivalent. D ionization in air. 35 The National Council on Radiation Protection and Measurements (NCRP) recommends an annual occupational effective (stochastic) dose equivalent limit ofA50 mSv (5 rem). B100 mSv (10 rem). C25 mSv (2.5 rem). D 200 mSv (20 rem). 36 Which of the following refers to a regular program of evaluation that ensures the proper functioning of x-ray equipment, thereby protecting both radiation workers and patients?ASensitometry BDensitometry CQuality assurance D Modulation transfer function 37 Radiation output from a diagnostic x-ray tube is measured in which of the following units of measurement?ARad BRem CRoentgen D Becqueral 38 The purpose of filters in a film badge isAto eliminate harmful rays Bto measure radiation quality Cto prevent exposure by alpha particles D as a support for the film contained within B to measure radiation quality 39 Which type of personnel radiation monitor can provide an immediate reading?AThermoluminescent dosimeter (TLD) BOptically stimulated luminescence (OSL) CFilm badge D Ionization chamber 40 According to the NCRP, the annual occupational whole-body dose-equivalent limit isA1 mSv B50 mSv C150 mSv D 500 mSv 41 What is the annual dose-equivalent limit for the skin and hands of an occupationally exposed individual?A5 rem B25 rem C50 rem D 100 rem 42 The roentgen is the unit ofAradiation dose Bbiologic dose Cdose equivalent D ionization in air 43 Occupational radiation monitoring is required when it is possible that the individual might receive more thanA5 mrem B10 mrem Cone-tenth the annual dose limit D one-fourth the annual dose limit C one-tenth the annual dose limit 44 Which of the following is considered the unit of exposure in air?ARoentgen (C/kg) BRad (Gy) CRem (Sv) D RBE 45 How will x-ray photon intensity be affected if the SID is doubled?AIts intensity increases two times. BIts intensity increases four times. CIts intensity decreases two times. D Its intensity decreases four times. D Its intensity decreases four times. 46 What is the annual TEDE limit for radiation workers?A5 mSv B500 mSv C5,000 mSv D 50 mSv 47 According to the National Council on Radiation Protection and Measurements (NCRP), the gestational dose-equivalent limit for embryo/fetus of a pregnant radiographer isA1 mSv B0.5 mSv C15 mSv D 50 mSv 48  Referring to the nomogram in Figure 3–8, what is the approximate patient ESE from a particular projection made at 105 cm using 125 kVp, 400 mA, 8 ms, and 3.0 mm Al total filtration ? Reproduced, with permission, from McCullough EC, Cameron JR. Exposure rates from diagnostic x-ray units. Br J Radiol 1970;43:448–451. A 23 mR B 48 mR C 230 mR D 480 mR 49 The largest dose to the male gonads is most likely to result from which of the following exposures?ALateral thoracic spine BOblique lumbar spine CCross-table lateral hip D AP axial skull C Cross-table lateral hip 50 The roentgen, as a unit of measurement, expressesAabsorbed dose Bexposure in air Cdose equivalent D dose to biologic material 51 The NCRP recommends an annual effective occupational dose-equivalent limit ofA2.5 rem (25 mSv) B5 rem (50 mSv) C10 rem (100 mSv) D 20 rem (200 mSv) 52 The unit of absorbed dose is theAroentgen (C/kg). Brad (Gy). Crem (Sv). D RBE. 53 The term effective dose refers toAwhole-body dose Blocalized organ dose Cgenetic effects D somatic and genetic effects 54 The purpose of filters in a film badge isAto eliminate harmful rays. Bto measure radiation quality. Cto prevent exposure by alpha particles. D as a support for the film contained within. B to measure radiation quality. 55 Which of the following personnel radiation monitors will provide an immediate reading?ATLD BFilm badge CLithium fluoride chips D Pocket dosimeter 56 The unit of measurement used to express occupational exposure is theAroentgen (C/kg) Brad (Gy) Crem (Sv) D relative biologic effectiveness (RBE) 57 Any wall that the useful x-ray beam can be directed toward is called aAsecondary barrier Bprimary barrier Cleakage barrier D scattered barrier 58 The annual dose limit for occupationally exposed individuals is valid forAalpha, beta, and x-radiations Bx- and gamma radiations only Cbeta, x-, and gamma radiations D all ionizing radiations C beta, x-, and gamma radiations 59 What is the established fetal dose-limit guideline for pregnant radiographers during the entire gestation period?A0.1 rem B0.5 rem C5.0 rem D 10 rem 60 According to the NCRP, the annual occupational dose-equivalent limit (50 rem) to the thyroid, skin, and extremities isA50 mSv B150 mSv C500 mSv D 1,500 mSv |
Which of the following personnel monitoring devices used in diagnostic radiography is considered to be the most sensitive and accurate?
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