Question 1

What instrument can be calibrated to read air kerma?

Accepted Answer

A)  Amp meter
B)  Coulomb counter
C)  Standard,or free-air,ionization chamber
D)  VoltmeterE) A) and C)
F) None of the above

Question 2

In therapeutic radiology what SI units are now routinely used to specify absorbed dose?

Accepted Answer

A)  Coulomb per kilogram and roentgen
B)  Air kerma and microgray
C)  Gray and centigray
D)  Sievert and millisievertE) B) and C)
F) All of the above

Question 3

Which of the following are early tissue reactions of ionizing radiation that were experienced by early radiation workers?
1) Diffuse redness of skin
2) Blood disorders
3) Organ atrophy
4) Intestinal disorders

Accepted Answer

A)  1,2,and 3 only
B)  2,3,and 4 only
C)  1,2,and 4 only
D)  1,2,3,and 4E) A) and C)
F) C) and D) C

Question 4

In the SI system,an energy absorption of 1 J/kg of matter in the irradiated object equals which of the following?

Accepted Answer

A)  10 Sv
B)  5 C/kg
C)  1 mSv
D)  1 GyE) None of the above
F) B) and C)

Question 5

Alpha particles have a radiation weighting factor (WR) that is numerically equal to

Accepted Answer

A)  1.
B)  5.
C)  10.
D)  20.E) B) and C)
F) All of the above

Question 6

Which of the following types of ionizing radiation produce virtually the same biologic effect in body tissue for equal absorbed doses?

Accepted Answer

A)  X-rays,beta particles,and gamma rays
B)  Alpha particles,beta particles,and gamma rays
C)  X-rays,neutrons,and gamma rays
D)  X-rays,alpha particles,and fast neutronsE) A) and C)
F) A) and D)

Question 7

For x-ray and gamma ray photons with energies up to 3 million electron volts (MeV) ,which of the following radiation quantities may be defined as the measure of the total electric charge of one sign,either all pluses or all minuses,per unit mass that these two types of radiation generate in dry air at standard temperature and pressure (760 mm Hg or 1 atmosphere at sea level and 22° C) ?

Accepted Answer

A)  Absorbed dose
B)  Equivalent dose
C)  Exposure
D)  Collective effective doseE) B) and C)
F) All of the above

Question 8

The whole-body TEDE regulatory limit for exposed personnel is _____________ and ______________ for the general public.

Accepted Answer

A)  0.05 Sv; 0.001 Sv
B)  0.15 Sv; 0.015 Sv
C)  0.25 Sv; 0.025 Sv
D)  0.5 Sv; 0.1 SvE) C) and D)
F) A) and D) A

Question 9

As the intensity of x-ray exposure of the air volume increases,the number of electron-ion pairs produced

Accepted Answer

A)  also increases.
B)  decreases considerably.
C)  decreases slightly.
D)  remains the same.E) A) and D)
F) B) and C)

Question 10

Cataract formation,fibrosis,reduced fertility and sterility are classified as

Accepted Answer

A)  early tissue reactions of ionizing radiation.
B)  late tissue reactions of ionizing radiation.
C)  hereditary effects of ionizing radiation.
D)  stochastic effects of ionizing radiation.E) A) and B)
F) C) and D)

Question 11

Which of the following formulas is used to calculate effective dose?
1) EfD = (D × WR) ₁ + (D × WR) ₂ + (D × WR) ₃
2) EfD = D × WR × WT
3) EfD = D ÷ WR × WT

Accepted Answer

A)  1 only
B)  2 only
C)  3 only
D)  1,2,and 3E) A) and C)
F) A) and B)

Question 12

Who discovered x-rays on November 8,1895?

Accepted Answer

A)  Thomas A.Edison
B)  Clarence Madison Dally
C)  Louis Harold Gray
D)  Wilhelm Conrad RoentgenE) C) and D)
F) None of the above

Question 13

What do radiation weighting factors take into consideration?
1) The overall risk of exposure to humans from ionizing radiation
2) Both the internal and external dose measurements
3) The fact that some types of radiation are more efficient at causing biologic damage than other types of radiation for a given dose.

Accepted Answer

A)  1 only
B)  2 only
C)  3 only
D)  1,2,and 3E) A) and B)
F) A) and D)

Question 14

Which of the following units of measure are not SI units?
1) Roentgens
2) Coulombs per kilogram,grays,sieverts
3) Rads and rems

Accepted Answer

A)  1 only
B)  2 only
C)  3 only
D)  1 and 3 onlyE) C) and D)
F) A) and B)

Question 15

The total kinetic energy released in a unit mass (kilogram) of air and expressed in metric units of joules per kilogram is

Accepted Answer

A)  absorbed dose.
B)  air kerma.
C)  effective dose.
D)  equivalent dose.E) A) and D)
F) B) and C)

Question 16

Among physicians,cancer deaths attributed to x-ray exposure were reported as early as

Accepted Answer

A)  1910.
B)  1930.
C)  1937.
D)  1945.E) All of the above
F) C) and D) A

Question 17

Which of the following is essentially the sum total of air kerma over the exposed area of the patient's body surface?

Accepted Answer

A)  Absorbed dose
B)  Dose area product
C)  Effective dose
D)  Equivalent doseE) B) and C)
F) A) and C)

Question 18

Which of the following is the SI unit of electric current?

Accepted Answer

A)  Ampere
B)  Coulomb per kilogram
C)  Erg
D)  SievertE) A) and B)
F) A) and C)

Question 19

If 400 people receive an average effective dose of 0.25 Sv,what is the collective effective dose?

Accepted Answer

A)  100 person-Sv
B)  200 person-Sv
C)  800 person-Sv
D)  1600 person-SvE) B) and D)
F) C) and D)

Question 20

How is dose area product usually specified?

Accepted Answer

A)  In coulomb per kilogram
B)  In ergs per gram
C)  In subunits of millisievert
D)  In units of mGy-cm2E) A) and B)
F) A) and C)

Exam 4: Radiation Quantities and Units

What instrument can be calibrated to read air kerma?

Correct Answer
verified

In therapeutic radiology what SI units are now routinely used to specify absorbed dose?

Correct Answer
verified

Which of the following are early tissue reactions of ionizing radiation that were experienced by early radiation workers? 1) Diffuse redness of skin 2) Blood disorders 3) Organ atrophy 4) Intestinal disorders

Correct Answer
verified
C

In the SI system,an energy absorption of 1 J/kg of matter in the irradiated object equals which of the following?

Correct Answer
verified

Alpha particles have a radiation weighting factor (WR) that is numerically equal to

Correct Answer
verified

Which of the following types of ionizing radiation produce virtually the same biologic effect in body tissue for equal absorbed doses?

Correct Answer
verified

Correct Answer
verified

The whole-body TEDE regulatory limit for exposed personnel is _ and __ for the general public.

Correct Answer
verified
A

As the intensity of x-ray exposure of the air volume increases,the number of electron-ion pairs produced

Correct Answer
verified

Cataract formation,fibrosis,reduced fertility and sterility are classified as

Correct Answer
verified

Which of the following formulas is used to calculate effective dose? 1) EfD = (D × WR) ₁ + (D × WR) ₂ + (D × WR) ₃ 2) EfD = D × WR × WT 3) EfD = D ÷ WR × WT

Correct Answer
verified

Who discovered x-rays on November 8,1895?

Correct Answer
verified

Correct Answer
verified

Which of the following units of measure are not SI units? 1) Roentgens 2) Coulombs per kilogram,grays,sieverts 3) Rads and rems

Correct Answer
verified

The total kinetic energy released in a unit mass (kilogram) of air and expressed in metric units of joules per kilogram is

Correct Answer
verified

Among physicians,cancer deaths attributed to x-ray exposure were reported as early as

Correct Answer
verified
A

Which of the following is essentially the sum total of air kerma over the exposed area of the patient's body surface?

Correct Answer
verified

Which of the following is the SI unit of electric current?

Correct Answer
verified

If 400 people receive an average effective dose of 0.25 Sv,what is the collective effective dose?

Correct Answer
verified

How is dose area product usually specified?

Correct Answer
verified

Exam 4: Radiation Quantities and Units

What instrument can be calibrated to read air kerma?

Correct AnswerverifiedShow Answer

In therapeutic radiology what SI units are now routinely used to specify absorbed dose?

Correct AnswerverifiedShow Answer

Which of the following are early tissue reactions of ionizing radiation that were experienced by early radiation workers? 1) Diffuse redness of skin 2) Blood disorders 3) Organ atrophy 4) Intestinal disorders

Correct AnswerverifiedC

In the SI system,an energy absorption of 1 J/kg of matter in the irradiated object equals which of the following?

Correct AnswerverifiedShow Answer

Alpha particles have a radiation weighting factor (WR) that is numerically equal to

Correct AnswerverifiedShow Answer

Which of the following types of ionizing radiation produce virtually the same biologic effect in body tissue for equal absorbed doses?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The whole-body TEDE regulatory limit for exposed personnel is _____________ and ______________ for the general public.

Correct AnswerverifiedA

As the intensity of x-ray exposure of the air volume increases,the number of electron-ion pairs produced

Correct AnswerverifiedShow Answer

Cataract formation,fibrosis,reduced fertility and sterility are classified as

Correct AnswerverifiedShow Answer

Which of the following formulas is used to calculate effective dose? 1) EfD = (D × WR) ₁ + (D × WR) ₂ + (D × WR) ₃ 2) EfD = D × WR × WT 3) EfD = D ÷ WR × WT

Correct AnswerverifiedShow Answer

Who discovered x-rays on November 8,1895?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following units of measure are not SI units? 1) Roentgens 2) Coulombs per kilogram,grays,sieverts 3) Rads and rems

Correct AnswerverifiedShow Answer

The total kinetic energy released in a unit mass (kilogram) of air and expressed in metric units of joules per kilogram is

Correct AnswerverifiedShow Answer

Among physicians,cancer deaths attributed to x-ray exposure were reported as early as

Correct AnswerverifiedA

Which of the following is essentially the sum total of air kerma over the exposed area of the patient's body surface?

Correct AnswerverifiedShow Answer

Which of the following is the SI unit of electric current?

Correct AnswerverifiedShow Answer

If 400 people receive an average effective dose of 0.25 Sv,what is the collective effective dose?

Correct AnswerverifiedShow Answer

How is dose area product usually specified?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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C

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The whole-body TEDE regulatory limit for exposed personnel is _ and __ for the general public.

Correct Answer
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A

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A

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