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Mock Exam Questions
| Question | Answer |
|---|---|
| Using a 75 kVp x-ray beam with a 0.25 mm lead equivalent apron provides prtection from _____ of the beam striking it. a.55% b. 66% c. 77% d. 88% | b. 66% At 75 kVp, a 0.25 lead apron will attenuate 66% of the beam striking it. |
| If 90 kVp is used with a single-phase generator, the minimum electron voltage across the tube is ________ keV. a. 90 b. 60 c. 30 d. 0 | d. 0 Single-phase generators have a 100% ripple factor. This means that the voltage across the tube drops to “0” during an x-ray exposure. |
| Which type of communication includes eye contact, touch and tone of voice? a. verbal b. nonverbal c. paralanguage d. body languqage | b. nonverbal Nonverbal communication includes all exchange of information from one person to another absent actual words of speech. Paralanguage/body language considered forms of nonverbal communication. Verbal communication includes speech and grammar |
| Which are the appropriate methods to ensure the correct drug is administered to the patient? 1. Confirm the correct medication. 2. Record the time and date of administration. 3. Check the label at least 3 times. | b. 1 and 3 Tech verifies med/check label 3x. 1. When draw med (similarity many med names) 2. Admin med 3. Replace container Recording date/time doesn't determine right drug, but is required. |
| Which of the following is an example of a primary barrier? a. lead apron b. lead gloves c. exposure room door d. control room window | c. exposure room door The exposure room door protects outside occupants from exposure to the primary beam. |
| X-ray tubes are operated at or above ______ kVp to avoid being space-charge limited. a. 35 b. 40 55 d. 70 | b. 40 Below 40 kVp, current in x-ray tube limited by space-charge effect. IE: the strong electrostatic repulsion of electrons limits filament electrons that can be released when filament temperature is increased. |
| The International Commission on Radiological Protection (ICRP) dose equivalent limit for the hands is_______ mSv. a. 20 b. 50 c. 150 d. 500 | d. 500 500 mSv each is the annual equivalent dose radiation limit to the hands. |
| Which of the following is considered a late nonstochastic effect? a. fibrosis b. cancer c. birth defect d. increased fertility | a. fibrosis Fibrotic changes to tissue are a late effect caused by radiation exposure. |
| When discussing the grid, the letter “K” represents the ________. a. grid ratio b. contrast improvement factor c. bucky factor d. selectivity | b. contrast improvement factor Letter “K” represents contrast improvement factor for grid. Grid ratio is height of lead strips relative to distance between lead strips. Grid selectivity is measure of how much scatter vs primary beam grid removes. |
| According to the American College of Radiology, which of the following are indications for obtaining a skeletal survey? 1. suspected nonaccidental trauma 2. skeletal dysplasias, syndromes, and metabolic disorders 3. neoplasms | d. 1, 2, 3 The American College of Radiology provides 3 indications for skeletal surveys: suspected nonaccidental trauma; skeletal dysplasias, syndromes, and metabolic disorders; and neoplasms. |
| Primary radiation barriers must be AT LEAST ______ feet high. a. 5 b. 6 c. 7 d. 8 | c. 7 Primary protective barriers are required to be 7 feet high from the floor. |
| A wedge filter is a type of ________ filter. a. inherent b. compensating c. added d. trough | c. added wedge filter=type of compensating filter. Used to provide IR w/uniform exposure when imaging body structures w/varying thicknesses (i.e., a foot). Thick edge of filter placed over thin body part and thin edge is placed over thick part. |
| The BEST reason to use touch for emphasis when performing a radiologic examination is to: a. specify instructions or locations b. convey empathy c. measure body part before choosing exposure factors d. ID landmarks | a. specify locations or instructions Touch from tech can assist a patient w/understanding appropriate positioning or communicate locations for specific examination. Empathy can reassure patients, but is expressed more in words and tone than in touch. |
| A 25-gauge, 0.5-inch needle is BEST used for a(n) ________ injection. a. Intradermal b. Intramuscular c. subcutaneous d.intravenous | c. subcutaneous Subcutaneous is best choice for 25-gauge needle, b/c has small diameter/short length won't penetrate deeply into epidermis. The gauge and length of needles for intradermal, intramuscular, and intravenous injections are all different. |
| According to NCRP Report No. 116, annual occupational exposure to the lens of the eye should not exceed: a. 25 mSv b. 50 mSv c. 100 mSv d. 150 mSv | c. 150 mSv NCRP Report No. 116 states that the annual occupational exposure limit for the lens of the eye is 150 mSv, or 15 rem. |
| 3 projections taken for long-bone measurement (scanography technique) of lower extremity include: a. AP hip, lateral femur, AP lower leg b. AP hip, lateral knee, AP lower leg c. AP femur, AP lower leg, AP foot d. AP hip, AP knee, AP ankle | d. AP hip, AP knee, AP ankle Scanography technique involves using 3 separate IRs to acquire AP projections of hips, knees, and ankles. Very important that patient does not move between exposures to ensure all projections are same. |
| The letter “U” as an abbreviation can be mistaken for: a. 0 b. unilateral c. under d. microliters | a. 0 The letter “U” can have a closed loop at the top of the letter, which might cause it be mistaken for a 0 or the number 4. |
| Specific purpose of contrast medium: a. show surrounding tissue w/same density as region of interest b. help distinguish differences between anatomic tissues c. produce density changes in soft tissue anatomy d. Reduce rad’s need for ambient light | b. help distinguish differences between anatomic tissues The purpose of contrast media is to enhance radiographic detail between soft tissue structures. |
| PA chest taken using 300 mA, 0.008 seconds, 110 kVp. If exam repeated using AEC w/min response time of 10 ms, which factors appropriate? a. 400 mA, 0.006 seconds, 110 kVp b. 200 mA, 0.012 seconds, 110 kVp c. 600 mA, 0.004 seconds, 110 kVp d. All | b. 200 mA, 0.012 seconds, 110 kVp Min resp time (MRT)=how long AEC to detect/respond to exp. Here, MRT is 10 ms (0.01 seconds). AEC won't term exp <0.01 secs. If exp time is less than MRT, RE increases b/c unit won't turn off until MRT reached. |
| Which guideline is used to reduce personnel/patient dose during fixed fluoroscopy? a. 30 Roentgens (R)/min maximum tabletop exposure rate b. 15-inch minimum SSD c. minimum filtration of 1.5 mm aluminum equivalent d. 0.5 mm primary protective barrier | b. 15-inch minimum SSD The minimum source-to-skin distance for a fixed fluoroscopy unit is 15 inches. |
Created by:
Larobbins
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