Question 1

Which of the following units 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 2

If a patient receiving x-ray therapy treatment receives a total dosage of 6000 rads,the dosage may be recorded as _____________ if the SI system is used.

Accepted Answer

A)  12,000 Gy
B)  6000 cGy
C)  600 mGy
D)  60 coulomb per kilogramE) A) and B)
F) None of the above

Question 3

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 4

Which of the following statements is true?

Accepted Answer

A)  100 rem = 1 centisievert
B)  10 rem = 1 centisievert
C)  1 rem = 1 centisievert
D)  0.1 rem = 1 centisievertE) A) and D)
F) A) and C)

Question 5

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) B) and D)
F) C) and D)

Question 6

Who was the first American radiation worker to die from radiation-induced cancer in October of 1904?

Accepted Answer

A)  Thomas A.Edison
B)  Wilhelm C.Roentgen
C)  Clarence Madison Dally
D)  Marie CurieE) None of the above
F) All of the above

Question 7

Which of the following rem values equals 35 mSv?

Accepted Answer

A)  0.35 rem
B)  3.5 rem
C)  35 rem
D)  350 remE) C) and D)
F) All of the above

Question 8

Of the following hereditary effects,which are considered to be late stochastic effects from exposure to ionizing radiation?
1) Decreased birth weight
2) Increased stillbirths
3) Infant and childhood mortality

Accepted Answer

A)  1 only
B)  2 only
C)  3 only
D)  1,2,and 3E) None of the above
F) B) and C) D

Question 9

In the diagnostic radiology energy range from 23 to 150 kVp (which includes mammography) ,which of the following tissues possesses the greatest ability to absorb radiant energy through the process of photoelectric absorption?

Accepted Answer

A)  Air
B)  Bone
C)  Fat
D)  MuscleE) A) and D)
F) A) and C)

Question 10

Of the following numerical choices,which is the effective atomic number (Zeff)  of soft tissue?

Accepted Answer

A)  15
B)  13.8
C)  7.4
D)  5.9E) A) and B)
F) A) and C)

Question 11

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

Accepted Answer

A)  1.
B)  5.
C)  10.
D)  20.E) None of the above
F) A) and B)

Question 12

For x-ray and gamma ray photons with energies up to 3 million electron volts (MeV) ,which of the following quantities may be defined as the measure of the total electrical charge of one sign,either all pluses or all minuses,per unit mass that these two kinds of radiation generate in air only?

Accepted Answer

A)  Absorbed dose
B)  Equivalent dose
C)  Exposure
D)  Collective effective doseE) B) and C)
F) A) and C)

Question 13

Which of the following is a unit of energy that may be defined as the work done or energy expended when a force of 1 newton (N)  acts on an object along a distance of 1 meter (m) ?

Accepted Answer

A)  Coulomb per kilogram
B)  Erg
C)  Gray
D)  JouleE) All of the above
F) A) and D)

Question 14

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

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) B) and D)

Question 15

Which of the following rem values equals 4000 mSv?

Accepted Answer

A)  4 rem
B)  40 rem
C)  400 rem
D)  4000 remE) A) and D)
F) B) and C)

Question 16

In the SI system,an energy absorption of 1 joule (J)  per kilogram 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) A) and D)
F) A) and C)

Question 17

Which of the following effects must be measured to determine the total amount of radiation exposure in a specific volume of dry air under standard conditions of pressure and temperature (760 mm Hg or 1 atmosphere at sea level and 22° C) ?

Accepted Answer

A)  Biologic damage
B)  Cellular activity
C)  Energy absorption
D)  Quantity of ionizationE) B) and C)
F) A) and D)

Question 18

Beta particles are actually:

Accepted Answer

A)  gamma rays.
B)  high-speed electrons.
C)  protons.
D)  x-rays.E) None of the above
F) A) and B)

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-Sieverts
B)  200 person-Sieverts
C)  800 person-Sieverts
D)  1600 person-SievertsE) All of the above
F) A) and C) A

Question 20

One thousand five hundred rem equals _________ Sieverts.

Accepted Answer

A)  15
B)  150
C)  1500
D)  15,000E) A) and B)
F) A) and C)

Exam 4: Radiation Quantities and Units

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

Correct AnswerverifiedShow Answer

If a patient receiving x-ray therapy treatment receives a total dosage of 6000 rads,the dosage may be recorded as _____________ if the SI system is used.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

Which of the following statements is true?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Who was the first American radiation worker to die from radiation-induced cancer in October of 1904?

Correct AnswerverifiedShow Answer

Which of the following rem values equals 35 mSv?

Correct AnswerverifiedShow Answer

Of the following hereditary effects,which are considered to be late stochastic effects from exposure to ionizing radiation? 1) Decreased birth weight 2) Increased stillbirths 3) Infant and childhood mortality

Correct AnswerverifiedD

In the diagnostic radiology energy range from 23 to 150 kVp (which includes mammography) ,which of the following tissues possesses the greatest ability to absorb radiant energy through the process of photoelectric absorption?

Correct AnswerverifiedShow Answer

Of the following numerical choices,which is the effective atomic number (Zeff) of soft tissue?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

For x-ray and gamma ray photons with energies up to 3 million electron volts (MeV) ,which of the following quantities may be defined as the measure of the total electrical charge of one sign,either all pluses or all minuses,per unit mass that these two kinds of radiation generate in air only?

Correct AnswerverifiedShow Answer

Which of the following is a unit of energy that may be defined as the work done or energy expended when a force of 1 newton (N) acts on an object along a distance of 1 meter (m) ?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following rem values equals 4000 mSv?

Correct AnswerverifiedShow Answer

In the SI system,an energy absorption of 1 joule (J) per kilogram of matter in the irradiated object equals which of the following?

Correct AnswerverifiedShow Answer

Which of the following effects must be measured to determine the total amount of radiation exposure in a specific volume of dry air under standard conditions of pressure and temperature (760 mm Hg or 1 atmosphere at sea level and 22° C) ?

Correct AnswerverifiedShow Answer

Beta particles are actually:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

One thousand five hundred rem equals _________ Sieverts.

Correct AnswerverifiedShow Answer

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