B.personal protection

Question 1

____ radiation comes from the natural environment

Answer 1

BAckground

Question 2

There are three types of background radiation:

Answer 2

terrestrial, cosmic and internal radioactive elements

Question 3

Terrestrial radiation comes from naturally occurring elements in the

Answer 3

earths surface

Question 4

Terrestrial radiation can exist in building material. What is an example

Answer 4

Radon

Question 5

Cosmic radiation Exposure levels increase with increasing

Answer 5

altitudes

Question 6

_____radiation comes from radiation produced from the sun and stars

Answer 6

cosmic

Question 7

Internal radioactive elements naturally exist in

Answer 7

our bodies

Question 8

The main internal radioactive element is

Answer 8

potassium-40

Question 9

Potassium-40 emits

Answer 9

beta and gamma rays

Question 10

_______ is An attempt to keep harmful radiation exposure to as little as possible

Answer 10

ALARA” (as low as reasonably achievable):

Question 11

ALARA principle assures that the least harm will be done to patients as well as radiation workers. It is based on

Answer 11

linear non-threshold dose response relationships

Question 12

Radiation workers are at the same risk of death as

Answer 12

other workers in “safer” industries

Question 13

_________ are the most important aspects of radiation protection Decreasing your time spent exposed to radiation reduces the dose received

Answer 13

Time, distance, and shielding

Question 14

If exposure time is reduced by half, then exposure will be

Answer 14

reduced by half

Question 15

Increasing your distance from the source of radiation…..

Answer 15

reduces the dose received

Question 16

The ________ explains the change in dose with increasing or decreasing

Answer 16

inverse square law

Question 16

_____is the best form of protection in radiation therapy

Answer 16

Shielding

Question 17

______ from radiation is very important in the protection of the radiation worker and the public

Answer 17

proper shielding

Question 18

Effective dose limits:
Annual occupation exposure

Answer 18

50 mSv

Question 19

Effective dose limits:
cumulative occupation exposure

Answer 19

10 mSv x age

Question 20

Equivalent dose annual limits for tissues
Lens of eyes:

Answer 20

150 mSv (15 rem)

Question 21

Equivalent dose annual limits for tissues
SKin, hands, and feet

Answer 21

500 mSv ( 50 rem)

Question 22

Public Exposures (annual)
1. Continuous/frequent exposure

Answer 22

1 mSv

Question 22

Public Exposures (annual)
2. Infrequent exposure

Answer 22

5 msv ( 0.5rem)

Question 23

Public Exposures (annual)- Tissues and organs
Lens of eye

Answer 23

15 mSv (1.5 Rem)

Question 24

Embryo/Fetus Exposure
Total dose:

Answer 24

5 mSv (0.5rem)

Question 24

Public Exposures (annual)- Tissues and organs
skin, hands feet

Answer 24

50 mSv ( 5 rem)

Question 25

There is a ____ record of radiation received by the radiation worker

Answer 25

permanent

Question 25

Embryo/Fetus Exposure
Monthly effective dose

Answer 25

0.5 mSv (0.05 rem)

Question 26

The radiation worker should be monitored if they are expected to receive more than 10 percent of the

Answer 26

effective dose equivalent

Question 27

Health care institutions must keep these records

Answer 27

forever