Compre Possible Questions

Question 1

1. If the total exposure allowed/ day

Answer 1

Allowed= 0.2Sv
Allowed/hr = 8hrs/day
0.025mSv
=0.2/8

Question 2

2. Dose required permanent sterility for female

Answer 2

500rad

Question 3

Leading international organization

Answer 3

ICRP

Question 4

Dose received by radiation workers except:

Answer 4

coulomb/kg

Question 5

A patient exposed to pelvis examination

Answer 5

2rad- 2 x a (alpha)
2 x 20= 40mSv/rem

Question 6

Dose limit for patient

Answer 6

D=K/kg ; D= e/m

Question 7

Calculation for kerma involves the ff:

Answer 7

energy fluence, energy, energy mass 12.3

Question 8

For general leakage radiation allowed at 1m

Answer 8

100mR/h

Question 9

Ff. devices work under principle of luminescence-

Answer 9

TLD & OSL

Question 10

11. Added to the filling of Geiger-Muller agent

Answer 10

quenching agent; xenon*if common ang question

Question 11

12. During fluoroscopy the TLD is placed at-

Answer 11

collar, above level apron

Question 12

13. Amount of scattered radiation directly proportional except

Answer 12

collimation

Question 13

14. During pregnancy, required # of monitors-

Answer 13

2; 1 collar, 1 fetus

Question 14

15. Film badge material

Answer 14

aluminum & copper

Question 15

16. As a useful, most common used thickness have approx.

Answer 15

0.5mm

Question 16

17. TLD filter

Answer 16

aluminum & copper

Question 17

18. Most commonly used OSL crystal

Answer 17

aluminum oxide

Question 18

19. Film badge measures radiation dose except

Answer 18

alpha

Question 19

20. Level collar, outside lead apron

Answer 19

participant

Question 20

21. Where film badge is submitted-

Answer 20

PNRI

Question 21

22. When a radtech changes employment, what happens to his/her exposure history-

Answer 21

transfer; B

Question 22

23. Which of the ff. has highest effective dose-

Answer 22

barium enema

Question 23

24. A general public; infrequent

Answer 23

5mSv

Question 24

25. Ff. monitor provide permanent record-

Answer 24

film badge

Question 25

26. NRCP recommend a distance of __ to stand

Answer 25

2cm

Question 26

27. Shrinkage of an organ-

Answer 26

Atrophy

Question 27

28. Ingested (background rad)

Answer 27

K40

Question 28

29. How many % lead apron

Answer 28

99% attenuation

Question 29

30. 95% of occupational dose obtained

Answer 29

mobile &fluoroscopy

Question 30

31. Ensure maximum instrument calibrated at least:

Answer 30

annually; filmbadge- 1 month

Question 31

32. Types of apron at pregnancy

Answer 31

wrap around

Question 32

33. Proper collimation contribute to:

Answer 32

(A & B; increasing image contrast & reduce patient dose

Question 33

34. Which of the ff. are the features of fluoroscopic equipment-

Answer 33

protective curtain, filtration-2.5, collimation

Question 34

35. Lead is the most common shielding material due to the ff. reasons

Answer 34

high atomic #, high density; 1&2

Question 35

36. Who is the person in the hospital responsible for radiation sources

Answer 35

radiation safety officer; D

Question 36

37. Area required for shielding

Answer 36

fully occupied adjacent area

Question 37

38. Most common.. in cell orming reactive free radicals instruments should be calibrated annualy

Answer 37

radiolysis in water; B

Question 38

39. Ff. are the methods in radiation exposure control & diagnostic therapeutic radiology-

Answer 38

AOTA

Question 39

40. Materials used to substitute lead-

Answer 39

masonry

Question 40

the most common thickness of lead used as lead apron.

Answer 40

• 0.5mm

Question 41

• Minimum dimension of xray room with radiographic table

Answer 41

3.5 m x 4.0 m

Question 42

• Radiation level measurements at the other side of the walls and door/s shall not exceed

Answer 42

2.5 mR/hr

Question 43

length of time that the machine is turned on

Answer 43

• Use factor

Question 44

are Developing an appropriate radiation safety program and maintaining radiation monitoring records for all personnel

Answer 44

radiation safety officer (RSO)

Question 45

amount of dose delivered per unit time

Answer 45

• Exposure rate

Question 46

Is the cause of multiple scan average doses (MSAD) to increase

Answer 46

• Overlapping slices

Question 47

is the most useful tool for comparing radiation doses among different protocols

Answer 47

• CTDI VOLUME

Question 48

• 131 GBq of F-18 during a 2 h irradiation

Answer 48

3.5 Ci

Question 49

• 370 MBq (10 mCi) of

Answer 49

F-18 FDG- 7 mSv

Question 50

• limit the Mo-99 contamination

Answer 50

1 µCi

Question 51

• walls in the x-ray examination room shall be made of at least _____ poured concrete and at least_____ thickness of properly filled concrete hollow blocks and cement plaster.

Answer 51

15 cm; 20 cm

Question 52

or transportable x-ray facility, x-ray examination room should be at least _____ and only upright chest x-ray examinations shall be allowed.

Answer 52

1.0 m x 2.0 m

Question 53

A dose equivalent at a tissue depth of 1 cm

Answer 53

• Deep dose equivalence

Question 54

Annual shallow dose equivalent

Answer 54

• 500 mSv

Question 55

should be stored in or adjacent to a radiation area

Answer 55

• control monitor

Question 56

• Common problems with dosimetry associated with falsely low radiation exposure is when____

Answer 56

people are not wearing dosimeters when working with radiation source.

Question 57

Refers to the distance to the adjacent occupied area In the calculation of barrier thickness

Answer 57

• distance factor

Question 58

• input phosphor of the image intensifier is positioned___

Answer 58

35 cm above table top

Question 59

ESE for Chest PA X-ray in modern radiography

Answer 59

• 0.01 mGy

Question 60

most significant source of background radiation that is from ingestion

Answer 60

K40

Question 61

Pb attenuates 99% of secondary radiation

Answer 61

1mm