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1

1. Which of the following is the unit of absorbed dose?
a. Rad
b. Rem
c. RBE
d. Roentgen

A

2

2. Which of the following personnel monitoring devices is capable of providing an immediate reading?
a. Film badge
b. Ring badge
c. Pocket dosimeter
d. TLD

c. Pocket dosimeter

3

3. Of the following types of radiation, which one is considered the most ionizing?
a. Alpha
b. Beta
c. Gamma
d. X-ray

a. Alpha

4

4. The Geiger counter is capable of detecting which of the following type(s) of radiation?
1. X-rays
2. Gamma rays
3. Beta particles
a. 1 only
b. 2 only
c. 1 &2 only
d. 1, 2, and 3

d. 1, 2, and 3

5

5. The time it takes for a radioactive material to have ½ of its atoms disintegrate is known as what?
a. Lethal dose
b. Half life
c. Degree of disintegration
d. Specific ionization

b. Half life

6

6. While wearing a lead apron, where should the radiation monitor be worn?
a. On the collar, outside the apron
b. At the waist, outside the apron
c. At the waist under the apron
d. On the wrist

a. On the collar, outside the apron

7

7. Which of the following is a radiation survey instruments?
a. Gamma camera
b. Cutie pie
c. Pocket dosimeter
d. TLD

b. Cutie pie

8

8. Which of the following the least expensive type of radiation monitoring device?
a. TLD
b. OSL
c. Film badge
d. Pocket dosimeter

c. Film badge

9

9. Which of the following is the unit of exposure dose of gamma or x-rays?
a. Rad
b. Rem
c. RBE
d. Roentgen

d. Roentgen

10


10. Which of the following radiation monitoring devices is considered to be the most accurate?
a. Film badge
b. Ring badge
c. OSL
d. TLD

c. OSL

11

11. If the exposure rate is 10 R/minute at 40 inches, what will be the rate at 20 inches?
a. 20 R/minute
b. 40 R/minute
c. 60 R/minute
d. 80 R/minute

b. 40 R/minute

12

How many half value layers are required to reduce a 100R/minute exposure rate to 25R/minute?
a. 1
b. 2
c. 4
d. 8

b. 2

13

Which of the following interactions will occur in the diagnostic x-ray range?
1. Coherent scatter
2. Compton effect
3. photoelectric absorption
a. 1 only
b. 1 & 2 only
c. 2 & 3 only
d. 1, 2, &3

d. 1, 2, &3

14

14. Which of the following refers to the measuring of the quantity of an x-ray beam?
a. Quality control
b. Quantity control
c. Beam assurance
d. Dosimetry

d. Dosimetry

15

The Becquerel (curie) is a measurement of which of the following?
a. Number of atoms in an element
b. Number of gamma rays emitted
c. Number of disintegrations per second
d. Number of possible radioisotopes

c. Number of disintegrations per second

16

16. Radiation that leaves the tube housing by any means other than through the window is called:
a. Primary radiation
b. Scatter radiation
c. Leakage radiation
d. Remnant (exit) radiation

c. Leakage radiation

17

1. Which of the following are by-products of photoelectric absorption?
1. Photoelectron
2. Characteristic x-ray
3. Ionized atom
a. 1 & 2 only
b. 1 & 3 only
c. 2 & 3 only
d. 1, 2, and 3

d. 1, 2, and 3

18

What is the cumulative dose equivalent limits for 25 year old radiation worker?
a. 50 mSv (5 rem)
b. 100 mSv (10 rem)
c. 250 mSv (25 rem)
d. 350 mSv (35 rem)

c. 250 mSv (25 rem)

19

Which of the following is a major disadvantage of a film badge as a radiation monitoring device?
a. Radiation types cannot be determined
b. Immediate readings are not available
c. Must be changed monthly
d. They are grossly inaccurate

b. Immediate readings are not available

20

Where should a radiation worker’s radiation monitor be located if he is receiving a medical radiography exam?
a. On the collar of the patient gown
b. Lying on x-ray table - at eye level
c. Lying on x-ray table – waist high
d. Not in the radiographic room

d. Not in the radiographic room

21

Which of the following is the unit for biological dose?
a. Rad
b. Rem
c. RBE
d. Roentgen

c. RBE

22

What are the two general types of radiation detection devices?
a. Field survey and personnel monitoring
b. Survey meters and badges
c. Pocket and portable dosimeters
d. Particle and ray detectors

a. Field survey and personnel monitoring

23

Which of the following is the unit of measuring the activity of a radionuclide?
a. Rad
b. Rem
c. Curie
d. Roentgen

c. Curie

24

What do the letters LET stand for?
a. Lethal effective tolerance
b. Lethal exchange table
c. Linear energy transmutation
d. Linear energy transfer

d. Linear energy transfer

25

How does the energy of scatter radiation compare to that of the primary beam?
a. Less energy
b. More energy
c. Equal energy
d. Doubled energy

a. Less energy

26

How many milliroentgens are in one roentgen?
a. 10
b. 100
c. 1000
d. 5000

c. 1000

27

Which of the following refers to the fact that different types of radiation have different biological effects?
a. Roentgen
b. Rad
c. Rem
d. RBE

d. RBE

28

28. How is the roentgen unit determined?
a. Absorbed dose
b. Ionization in air
c. Half-value layer
d. Compared with rem

b. Ionization in air

29

29. During fluoroscopy which of the following will produce the greatest amount of scatter radiation?
a. Tube housing
b. Table top
c. Patient
d. Image intensifier

c. Patient

30

30. The Coulomb/kg (roentgen) unit only applies to which of the following types of radiation?
a. Alpha
b. Beta
c. X and gamma rays
d. Background

c. X and gamma rays