Deck 4: Radiation Quantities and Units

Question 1

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

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

Answer 1

1 and 3 only

Question 2

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

A) Thomas A. Edison
B) Wilhelm C. Roentgen
C) Clarence Madison Dally
D) Marie Curie

Answer 2

Clarence Madison Dally

Question 3

Which of the following statements is true?

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

Answer 3

1 rem = 1 centisievert

Question 4

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

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

Question 5

Which of the following rem values equals 35 mSv?

A) 0.35 rem
B) 3.5 rem
C) 35 rem
D) 350 rem

Question 6

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

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 neutrons

Question 7

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

A) 100 person-Sieverts
B) 200 person-Sieverts
C) 800 person-Sieverts
D) 1600 person-Sieverts

Question 8

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

A) 10 Sv
B) 5 C/kg
C) 1 mSv
D) 1 Gy

Question 9

Which of the following rem values equals 4000 mSv?

A) 4 rem
B) 40 rem
C) 400 rem
D) 4000 rem

Question 10

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

A) 1.
B) 5.
C) 10.
D) 20.

Question 11

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

A) Ampere
B) Coulomb per kilogram
C) Erg
D) Sievert

Question 12

Which of the following statements is correct?

A) 1 C/kg of dry air = ____1____ gray
2)58 x 10-4
B) 1 C/kg of dry air = ____1____ roentgen
2)58 x 10-4
C) 2.58 x 10-4 C/kg of dry air = 10 Sievert
D) 2.58 x 10-4 C/kg of dry air = 50 roentgen

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)?

A) Coulomb per kilogram
B) Erg
C) Gray
D) Joule

Question 14

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

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

Question 15

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?

A) Absorbed dose
B) Equivalent dose
C) Exposure
D) Collective effective dose

Question 16

One thousand five hundred rem equals _________ Sieverts.

A) 15
B) 150
C) 1500
D) 15,000

Question 17

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?

A) Air
B) Bone
C) Fat
D) Muscle

Question 18

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.

A) 12,000 Gy
B) 6000 cGy
C) 600 mGy
D) 60 coulomb per kilogram

Question 19

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

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

Question 20

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)?

A) Biologic damage
B) Cellular activity
C) Energy absorption
D) Quantity of ionization

Question 21

Beta particles are actually:

A) gamma rays.
B) high-speed electrons.
C) protons.
D) x-rays.

Question 22

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

A) 15
B) 13.8
C) 7.4
D) 5.9

Question 23

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

A) 1910.
B) 1930.
C) 1937.
D) 1945.

Question 24

Who discovered x-rays on November 8,1895?

A) Thomas A. Edison
B) Clarence Madison Dally
C) Louis Harold Gray
D) Wilhelm Conrad Roentgen