The document is a test on radiography testing at level 2. It contains 40 multiple choice questions covering topics like electromagnetic waves, x-ray and gamma ray properties, interactions between radiation and matter like the photoelectric effect and Compton scattering, radiation units like becquerel and sievert, radiation exposure and protection through distance, shielding and time. The questions test knowledge of radiation fundamentals, quantities, interactions, biological effects and safety.

1. RADIOGRAPHY TESTING
LEVEL-II
Page 1 of 8
GENERAL
1. X-rays and gamma rays are part of a family of waves called ………….. Waves.
a. Electromagnetic
b. Visible
c. Light
d. Radio
2. The amount / quantity of x-radiation or gamma radiation is often spoken of as the
……………. of the radiation.
a. Wave-length
b. Energy
c. Intensity
d. Frequency
3. The quality / energy of x-radiation or gamma radiation depends upon the
…………… of the radiation
a. Wave-length / frequency
b. Velocity
c. Intensity
d. Quantity
4. The speed at which X and gamma rays travel is (choose one)
a. The speed of light
b. The speed of sound
c. Varies with frequency
d. Varies with intensity
5. A beam of radiation consisting of a single wave length is known as :
a. Microscopic radiation
b. Monochromatic radiation
c. Heterogeneous radiation
d. Fluoroscopic radiation
6. Position has a positive charge with the mass of
a. Proton
b. Electron
c. Neutron

2. RADIOGRAPHY TESTING
LEVEL-II
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7. During the process of being absorbed the two most common ionizing interactions
between X or gamma radiation with matter are
a. Photo-electric effect
b. Compton effect
c. Both (a) & (b) as above
d. None of the above
8. The elements that make the best absorbers of radiation are
a. Polarized
b. Light
c. Heavy
d. None of the above
9. Which one of the following material of same thickness is best shielding material
a. Lead
b. Concrete
c. Barium
d. Steel
10.Photo-electric effect refers to
a. Electronic camera
b. Electro-magnetic spectrum
c. Complete absorption of photon
d. None of the above
11.Photo-electric effect occurs with low-energy photons with high-atomic number in
the range of
a. 0.3 Mev or less
b. 0.1 to 1 Mev
c.  1.02 Mev
12.Compton scattering occurs with low-energy photons in the range of
a. 0.1 Mev or less
b. 0.3 to 3 Mev
c.  1.02 Mev
13.Compton Effect is the mechanism where in a portion of the radiation is ……….
and a portion is ……………
a. Absorbed & Refracted
b. Refracted & Reflected
c. Absorbed & Scattered
d. None of the above

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LEVEL-II
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14.When a photon knocks an electron out of an atom, the two particles, one –ve
(electron) and one +ve (atom-less electron), are called….
a. Gamma rays
b. Annihilation
c. Ion-pair
15.High-energy photons of 1.02 Mev or more cause ionization by a method called
a. Photo-electric effect
b. Compton-Scattering
c. Pair-production
16.The unit of radiation activity is
a. Becquerel (Bq)
b. Gray (Gy)
c. Sievert (Sv)
d. Air-karma
17.One curie of radioactive material disintegrates at the rate of :
a. 3.7 x 10 8 disintegrations / sec.
b. 3.7 x 10 10 disintegrations / sec.
c. 3.7 x 10 9 disintegrations / sec.
18.ONE curie corresponds to
a. 37 GBq
b. 3.7 GBq
c. 37 TBq
d. 3.7 TBq
19.1.850 TBq corresponds to
a. 10 Ci
b. 1 Ci
c. 5 Ci
d. 50 Ci
20.The quantity of X or r radiation that produces in air, +ve or –ve ions, carrying 1
coulomb of charge per kg of air, defines
a. Becquerel
b. Gray
c. Sievert
d. Exposure

4. RADIOGRAPHY TESTING
LEVEL-II
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21.The basic unit of measure to express X or r radiation EXPOSURE is
a. Becquerel
b. Gray
c. Sievert
d. C/kg
22.The COULOMB / kg or Roentgen is a measure of
a. a radiation
b.  radiation
c. X & r radiation
d. Calories
23.The unit which is a measure of absorbed dose per kg of any matter
a. Becquerel
b. gray
c. sievert
d. C/kg
24.The weighted-absorbed dose in any tissue that compares Biological effectiveness
of different types of radiation is called
a. Curie
b. Exposure
c. Calories
d. Equivalent-dose
25.The unit which is a measure of biological dose produced in humans by any type
of radiation (equivalent dose)
a. Becquerel
b. gray
c. sever
d. C/kg
26.An exposure of 3 Roentgen of X radiation equals
a. 30 mSv
b. 3 mSv
c. 3000 mSv
d. 300 mSv

5. RADIOGRAPHY TESTING
LEVEL-II
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27.For radiation protection purposes 20 mGy of gamma dose equals
a. 1mGy of a dose
b. 1 mGy of 2 mev-neutron dose
c. 1 mGy of  dose
d. All of the above
28.Exposure to radiation may occur to…..
a. Whole body (uniform irradiation)
b. Individual organs of body (non-uniform irradiation)
c. Chemicals in Dark-Room
d. Both (a) and (b) as above
29.The three basic means of providing personnel protection from ionizing radiation
are…..
a. Time
b. Distance
c. Shielding
d. All the above
30.The standard dose rate of a radio-isotope is expressed in
a. Roentgen/hour/Ci//meter (RHM)
b. KeV or Mev
c. Half-value thickness
d. Tenth –value thickness
31.The standard dose rate of Ir. 192 per Ci at one meter is
a. 0.5 R
b. 1.3 R
c. 5 R
d. 10 mR
32.The standard dose rate of co. 60 per Ci at one meter is
a. 0.5 R
b. 1.3 R
c. 5 R
d. 13 R

6. RADIOGRAPHY TESTING
LEVEL-II
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33.The dose rate of 50 Ci Ir. 192 source at one meter is
a. 0.5 R
b. 1.3 R
c. 5 R
d. 25 R
34.The dose rate of Ir. 192 for 50 Ci at a distance of 10 meter is
a. 0.5 R
b. 1.3 R
c. 5 R
d. 0.25 R
35.Radiation intensity at certain is 20 R/hr. How many HVL are required to reduce
the intensity to 5 R.
a. 2 HVL
b. One TVL
c. One HVL
36.Radiation hazard to human exists from
a. Primary and scattered radiation
b. Natural radiation
c. Primary radiation only
37.The radiation level at 1 meter from a lead container housing a co. 60 is 50mR/h.
If 12 mm lead is removed from the container, what will be new radiation level at 2
meter distance?
a. 100 mR
b. 1000 mR
c. 25 mR
d. 250 mR
38.How many electrodes does the ionization chamber of an ionization chamber
survey meter
a. +ve ions flow to –ve electrode
b. –ve ions flow to +ve electrode
c. both (a) & (b) as above

7. RADIOGRAPHY TESTING
LEVEL-II
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39.Examples of somatic cells are
a. skin
b. liver
c. kidney
d. all of the above
40.Permissible accumulated dose in 5 years for non-occupational technician is
a. 2 mSv
b. 5 mSv
c. 10 mSv
d. 20 mSv

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LEVEL-II
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1. a 11. a 21. d 31. a
2. c 12. b 22. c 32. b
3. a 13. c 23. b 33. d
4. a 14. c 24. d 34. d
5. b 15. c 25. c 35. a
6. c 16. a 26. a 36. a
7. c 17. b 27. b 37. a
8. c 18. b 28. d 38. b
9. a 19. d 29. d 39. d
10. c 20. b 30. a 40. c