Qa Qc Test #1 Updated Questions And Correct Answers

QA QC TEST #1 UPDATED QUESTIONS AND CORRECT
ANSWERS
Question:
1. What three principles are used to minimize exposure?
Answer:
1. Time
2. Distance
3. Shielding

Question:
2. A patient's and the technologist's dose is directly related to the _______ or duration of the
exposure.
Answer:
time

Question:
3. What formula is used to find the exposure?
Answer:
Exposure = Rate x Time

Question:
4. What unit is rate measured in?
Answer:
mGy/min or mGy/hr or mGya/s

Question:
5. What represents positions of equal expo-sure in the fluoroscopy room (the farther you are from the
patient/fluoro unit, the lower your exposure)?
Answer:
Isoexposure curves

Question:
6. What are the three fluoroscopy safety mea-sures (time related)?
Answer:
1. Pulsed fluoroscopy-sequencing on and
off
2. 5-minute timer- reminds us that has
elapsed
3. Dead man switch- fluoro unit will not be
on unless switch is depressed.

Question:
7. As distance from the radiation source in-creases, the exposure __________.
Answer:
decreases

, Question:
8. The thickness of the absorber needed to reduce radiation intensity in half is known as?
Answer:
Half Value Layer

Question:
9. The thickness of the absorber needed to reduce radiation intensity to one tenth (1/10) is known as?
Answer:
Tenth Value Layer

Question:
10. In general radiography how much total fil-tration is needed when operated at 70 kVp?
Answer:
at least 2.5 mm Al

Question:
11. In Fluoroscopy how much total filtration is required?
Answer:
At least 2.5 mm Al

Question:
12. How much lead is required for gonadal shielding?
Answer:
.5 mm

Question:
13. How much lead is required for protective aprons in fluoro?
Answer:
.5 mm

Question:
14. How much lead is required for gloves?
Answer:
.25 mm

Question:
15. How much lead is required for lead cur-tains?
Answer:
.25 mm

Question:
16. How much lead is required for bucky slot cover?
Answer:
.25 mm

Question:
17. How much lead is required for thyroid shielding?