Health physics

Question 1

Whole body dose

Answer 1

5,000 mrem/year

Question 2

Any organ dose

Answer 2

50,000 mrem/year

Question 3

Skin dose

Answer 3

50,000 mrem/year

Question 4

Extremity dose

Answer 4

50,000 mrem/year

Question 5

Lens of eye dose

Answer 5

15,000 mrem/year

Question 6

Embryo of pregnant woman dose

Answer 6

500 mrem/year

Question 7

Members of public dose

Answer 7

100 mrem/year

Question 8

Roentgen

Answer 8

A measure of gamma/x-ray interaction in air

Question 9

Rad

Answer 9

Is a unit of absorbed dose. Amount of energy absorbed in some material. 1 Rad = 0.01 joules/kilogram

Question 10

REM

Answer 10

Is a unit of effective dose which takes into account relative biological effectiveness of the different forms of radiation.

Question 11

Alpha particle

Answer 11

2 neutrons and 2 protons emitted from the nucleus. Travels only a few inches in air.

Question 12

Beta particle

Answer 12

Electron ejected from the nucleus. Can travel several feet in air.

Question 13

Whole body limit (OSHA)

Answer 13

1.25 rem per calendar quarter

Question 14

Extremities limit (OSHA)

Answer 14

18.75 rem per calendar quarter

Question 15

Skin exposure limit (OSHA)

Answer 15

7.5 rem calendar quarter

Question 16

Radiation area

Answer 16

.005rem/hour at 30cm