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RADIOGRAPHY TESTING LEVEL-II
GENERAL 1. X-rays and gamma rays are part of a family of waves called ………….. Waves. a. b. c. d.
Electromagnetic Visible Light Radio
2. The amount / quantity of x-radiation or gamma radiation is often spoken of as the ……………. of the radiation. a. b. c. d.
Wave-length Energy Intensity Frequency
3. The quality / energy of x-radiation or gamma radiation depends upon the …………… of the radiation a. b. c. d.
Wave-length / frequency Velocity Intensity Quantity
4. The speed at which X and gamma rays travel is (choose one) a. b. c. d.
The speed of light The speed of sound Varies with frequency Varies with intensity
5. A beam of radiation consisting of a single wave length is known as : a. b. c. d.
Microscopic radiation Monochromatic radiation Heterogeneous radiation Fluoroscopic radiation
6. Position has a positive charge with the mass of a. Proton b. Electron c. Neutron
Page 1 of 8
RADIOGRAPHY TESTING LEVEL-II 7. During the process of being absorbed the two most common ionizing interactions between X or gamma radiation with matter are a. b. c. d.
Photo-electric effect Compton effect Both (a) & (b) as above None of the above
8. The elements that make the best absorbers of radiation are a. b. c. d.
Polarized Light Heavy None of the above
9. Which one of the following material of same thickness is best shielding material a. b. c. d.
Lead Concrete Barium Steel
10. Photo-electric effect refers to a. b. c. d.
Electronic camera Electro-magnetic spectrum Complete absorption of photon 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. b. c. d.
Absorbed & Refracted Refracted & Reflected Absorbed & Scattered None of the above
Page 2 of 8
RADIOGRAPHY TESTING LEVEL-II
14. When a photon knocks an electron out of an atom, the two particles, one (electron) and one +ve (atom-less electron), are called….
–ve
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. b. c. d.
Becquerel (Bq) Gray (Gy) Sievert (Sv) 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. b. c. d.
37 GBq 3.7 GBq 37 TBq 3.7 TBq
19. 1.850 TBq corresponds to a. b. c. d.
10 Ci 1 Ci 5 Ci 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. b. c. d.
Becquerel Gray Sievert Exposure
Page 3 of 8
RADIOGRAPHY TESTING LEVEL-II
21. The basic unit of measure to express X or r radiation EXPOSURE is a. b. c. d.
Becquerel Gray Sievert C/kg
22. The COULOMB / kg or Roentgen is a measure of a. b. c. d.
a radiation radiation X & r radiation Calories
23. The unit which is a measure of absorbed dose per kg of any matter a. b. c. d.
Becquerel gray sievert C/kg
24. The weighted-absorbed dose in any tissue that compares Biological effectiveness of different types of radiation is called a. b. c. d.
Curie Exposure Calories Equivalent-dose
25. The unit which is a measure of biological dose produced in humans by any type of radiation (equivalent dose) a. b. c. d.
Becquerel gray sever C/kg
26. An exposure of 3 Roentgen of X radiation equals a. b. c. d.
30 mSv 3 mSv 3000 mSv 300 mSv
Page 4 of 8
RADIOGRAPHY TESTING LEVEL-II
27. For radiation protection purposes 20 mGy of gamma dose equals a. b. c. d.
1mGy of a dose 1 mGy of 2 mev-neutron dose 1 mGy of dose All of the above
28. Exposure to radiation may occur to….. a. b. c. d.
Whole body (uniform irradiation) Individual organs of body (non-uniform irradiation) Chemicals in Dark-Room Both (a) and (b) as above
29. The three basic means of providing personnel protection from ionizing radiation are….. a. b. c. d.
Time Distance Shielding All the above
30. The standard dose rate of a radio-isotope is expressed in a. b. c. d.
Roentgen/hour/Ci//meter (RHM) KeV or Mev Half-value thickness Tenth –value thickness
31. The standard dose rate of Ir. 192 per Ci at one meter is a. b. c. d.
0.5 R 1.3 R 5R 10 mR
32. The standard dose rate of co. 60 per Ci at one meter is a. b. c. d.
0.5 R 1.3 R 5R 13 R
Page 5 of 8
RADIOGRAPHY TESTING LEVEL-II
33. The dose rate of 50 Ci Ir. 192 source at one meter is a. b. c. d.
0.5 R 1.3 R 5R 25 R
34. The dose rate of Ir. 192 for 50 Ci at a distance of 10 meter is a. b. c. d.
0.5 R 1.3 R 5R 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. b. c. d.
100 mR 1000 mR 25 mR 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
Page 6 of 8
RADIOGRAPHY TESTING LEVEL-II
39. Examples of somatic cells are a. b. c. d.
skin liver kidney all of the above
40. Permissible accumulated dose in 5 years for non-occupational technician is a. b. c. d.
2 mSv 5 mSv 10 mSv 20 mSv
Page 7 of 8
RADIOGRAPHY TESTING LEVEL-II
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
Page 8 of 8
GENERAL 1. X-rays and gamma rays are part of a family of waves called ………….. Waves. a. b. c. d.
Electromagnetic Visible Light Radio
2. The amount / quantity of x-radiation or gamma radiation is often spoken of as the ……………. of the radiation. a. b. c. d.
Wave-length Energy Intensity Frequency
3. The quality / energy of x-radiation or gamma radiation depends upon the …………… of the radiation a. b. c. d.
Wave-length / frequency Velocity Intensity Quantity
4. The speed at which X and gamma rays travel is (choose one) a. b. c. d.
The speed of light The speed of sound Varies with frequency Varies with intensity
5. A beam of radiation consisting of a single wave length is known as : a. b. c. d.
Microscopic radiation Monochromatic radiation Heterogeneous radiation Fluoroscopic radiation
6. Position has a positive charge with the mass of a. Proton b. Electron c. Neutron
Page 1 of 8
RADIOGRAPHY TESTING LEVEL-II 7. During the process of being absorbed the two most common ionizing interactions between X or gamma radiation with matter are a. b. c. d.
Photo-electric effect Compton effect Both (a) & (b) as above None of the above
8. The elements that make the best absorbers of radiation are a. b. c. d.
Polarized Light Heavy None of the above
9. Which one of the following material of same thickness is best shielding material a. b. c. d.
Lead Concrete Barium Steel
10. Photo-electric effect refers to a. b. c. d.
Electronic camera Electro-magnetic spectrum Complete absorption of photon 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. b. c. d.
Absorbed & Refracted Refracted & Reflected Absorbed & Scattered None of the above
Page 2 of 8
RADIOGRAPHY TESTING LEVEL-II
14. When a photon knocks an electron out of an atom, the two particles, one (electron) and one +ve (atom-less electron), are called….
–ve
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. b. c. d.
Becquerel (Bq) Gray (Gy) Sievert (Sv) 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. b. c. d.
37 GBq 3.7 GBq 37 TBq 3.7 TBq
19. 1.850 TBq corresponds to a. b. c. d.
10 Ci 1 Ci 5 Ci 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. b. c. d.
Becquerel Gray Sievert Exposure
Page 3 of 8
RADIOGRAPHY TESTING LEVEL-II
21. The basic unit of measure to express X or r radiation EXPOSURE is a. b. c. d.
Becquerel Gray Sievert C/kg
22. The COULOMB / kg or Roentgen is a measure of a. b. c. d.
a radiation radiation X & r radiation Calories
23. The unit which is a measure of absorbed dose per kg of any matter a. b. c. d.
Becquerel gray sievert C/kg
24. The weighted-absorbed dose in any tissue that compares Biological effectiveness of different types of radiation is called a. b. c. d.
Curie Exposure Calories Equivalent-dose
25. The unit which is a measure of biological dose produced in humans by any type of radiation (equivalent dose) a. b. c. d.
Becquerel gray sever C/kg
26. An exposure of 3 Roentgen of X radiation equals a. b. c. d.
30 mSv 3 mSv 3000 mSv 300 mSv
Page 4 of 8
RADIOGRAPHY TESTING LEVEL-II
27. For radiation protection purposes 20 mGy of gamma dose equals a. b. c. d.
1mGy of a dose 1 mGy of 2 mev-neutron dose 1 mGy of dose All of the above
28. Exposure to radiation may occur to….. a. b. c. d.
Whole body (uniform irradiation) Individual organs of body (non-uniform irradiation) Chemicals in Dark-Room Both (a) and (b) as above
29. The three basic means of providing personnel protection from ionizing radiation are….. a. b. c. d.
Time Distance Shielding All the above
30. The standard dose rate of a radio-isotope is expressed in a. b. c. d.
Roentgen/hour/Ci//meter (RHM) KeV or Mev Half-value thickness Tenth –value thickness
31. The standard dose rate of Ir. 192 per Ci at one meter is a. b. c. d.
0.5 R 1.3 R 5R 10 mR
32. The standard dose rate of co. 60 per Ci at one meter is a. b. c. d.
0.5 R 1.3 R 5R 13 R
Page 5 of 8
RADIOGRAPHY TESTING LEVEL-II
33. The dose rate of 50 Ci Ir. 192 source at one meter is a. b. c. d.
0.5 R 1.3 R 5R 25 R
34. The dose rate of Ir. 192 for 50 Ci at a distance of 10 meter is a. b. c. d.
0.5 R 1.3 R 5R 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. b. c. d.
100 mR 1000 mR 25 mR 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
Page 6 of 8
RADIOGRAPHY TESTING LEVEL-II
39. Examples of somatic cells are a. b. c. d.
skin liver kidney all of the above
40. Permissible accumulated dose in 5 years for non-occupational technician is a. b. c. d.
2 mSv 5 mSv 10 mSv 20 mSv
Page 7 of 8
RADIOGRAPHY TESTING LEVEL-II
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
Page 8 of 8
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