Radiation Units

Question 1

causes diffuse redness over an area of skin after irradiation

Answer 1

Skin Erythema Dose

Question 2

Occupationally exposed persons could be continuously subjected without any apparatus harmful acute effect

Answer 2

Tolerance dose

Question 3

Tolerance dose unit

Answer 3

Roentgen

Question 4

Tolerance dose limit

Answer 4

0.2R/day

Question 5

negligable chance of sustaining specific biologic damage

Answer 5

Threshold dose

Question 6

largest dose of ionizing radiations

Answer 6

Mximum Permissible dose

Question 7

unit for maximum permissible dose

taditional unit of radiation protection

Answer 7

REM

Question 8

dose equivalent limit prescripted by IRCP to replace MPD

Answer 8

Effective dose equivalent

Question 9

Energy deposited in biologic tissue by ionizing radiation

Answer 9

Effective dose

Question 10

overall risk arising from irradiation of biologic tissue and organs

Answer 10

effective dose

Question 11

unit for effective doe

Answer 11

Sieverts

Question 12

expresses the concetration of radiation

Answer 12

Exposure (x)

Question 13

electrical charge of 1 coulomb

SI unit of exposure

Answer 13

c/kg

Question 14

conventional unit of exposure

radiation intensity will create 2.08x 10^8 ion pairs or 2,58x 10-4 C/kg

Answer 14

Roentgen

Question 15

calculation of radiation intensity in air

Answer 15

Air Kerma

Question 16

SI unit for air kerma

Answer 16

J/Kg

Question 17

special unit for air kerma

Answer 17

gray

Question 18

sum total of air kerma over the exposed area

Answer 18

Dose area product

Question 19

unit for dose area product

Answer 19

mGy-cm^2

Question 20

amoutnt of energy per unit mass absorbed by an irradiated object

Answer 20

Absorbed dose (D)

Question 21

SI unit for absorbed dose

Answer 21

J/kg

Question 22

special unit for absorbed dose

Answer 22

gray

Question 23

conventional unit absorbed dose

Answer 23

rad

Question 24

product of the average absorbed dose in a tissue organ and its associated radiation weighting factor

Answer 24

equivalent dose

Question 25

dimensionless factor that was chosen for radiation protection purposes

Answer 25

Radiation weighting Factor ( Wr)

Question 26

radiation factor for xray and gamma photon

Answer 26

1

Question 27

Wr for alpha particle

Answer 27

20

Question 28

a person receives exposures from various types of ionizing radiation

Answer 28

Equivalent Dose

Question 29

SI unit for equivalent dose

Answer 29

J/kg

Question 30

Special unit for eqd

Answer 30

Sievert

Question 31

conventional unit for eqd

Answer 31

REM

Question 32

Eqd =

Answer 32

D x Wr

Question 33

overall risk exposure to humans sum of weighted equivalent

Answer 33

effective dose

Question 34

takes into account the relative detriment to each specific organ

Answer 34

Tissue weightting factor

Question 35

SI unit for efd

Answer 35

J/kg

Question 36

Special unit for efd

Answer 36

sievert

Question 37

Conventional unit for efd

Answer 37

rem

Question 38

EfD =

Answer 38

D X Wr X wT

Question 39

RADIATION EXPOSURE OF A POPULATION OR GROUP product of average efd to the exposed population

Answer 39

collective effective dose

Question 40

SI unit for colefd

Answer 40

person-sievert

Question 41

conventional unit for colefd

Answer 41

man-rem

Question 42

ColEfD =

Answer 42

EfD x no of person irradiated

Question 43

sum of effective dose equivalent

Answer 43

Total effective dose equivalent

Question 44

quantity of radioactive material

Answer 44

activity

Question 45

SI unit for activity

Answer 45

becquerel

Question 46

conventional unit for activity

Answer 46

curie

Question 47

1 ci =

Answer 47

3.7 x 10^10 Bq

Question 48

1 cm ^3 of air at STP has a mass of

Answer 48

0.001293 g