study guide Flashcards
- Which of the following is the unit of absorbed dose?
a. Rad
b. Rem
c. RBE
d. Roentgen
A
- Which of the following personnel monitoring devices is capable of providing an immediate reading?
a. Film badge
b. Ring badge
c. Pocket dosimeter
d. TLD
c. Pocket dosimeter
- Of the following types of radiation, which one is considered the most ionizing?
a. Alpha
b. Beta
c. Gamma
d. X-ray
a. Alpha
- The Geiger counter is capable of detecting which of the following type(s) of radiation?
- X-rays
- Gamma rays
- Beta particles
a. 1 only
b. 2 only
c. 1 &2 only
d. 1, 2, and 3
d. 1, 2, and 3
- The time it takes for a radioactive material to have ½ of its atoms disintegrate is known as what?
a. Lethal dose
b. Half life
c. Degree of disintegration
d. Specific ionization
b. Half life
- While wearing a lead apron, where should the radiation monitor be worn?
a. On the collar, outside the apron
b. At the waist, outside the apron
c. At the waist under the apron
d. On the wrist
a. On the collar, outside the apron
- Which of the following is a radiation survey instruments?
a. Gamma camera
b. Cutie pie
c. Pocket dosimeter
d. TLD
b. Cutie pie
- Which of the following the least expensive type of radiation monitoring device?
a. TLD
b. OSL
c. Film badge
d. Pocket dosimeter
c. Film badge
- Which of the following is the unit of exposure dose of gamma or x-rays?
a. Rad
b. Rem
c. RBE
d. Roentgen
d. Roentgen
- Which of the following radiation monitoring devices is considered to be the most accurate?
a. Film badge
b. Ring badge
c. OSL
d. TLD
c. OSL
- If the exposure rate is 10 R/minute at 40 inches, what will be the rate at 20 inches?
a. 20 R/minute
b. 40 R/minute
c. 60 R/minute
d. 80 R/minute
b. 40 R/minute
How many half value layers are required to reduce a 100R/minute exposure rate to 25R/minute?
a. 1
b. 2
c. 4
d. 8
b. 2
Which of the following interactions will occur in the diagnostic x-ray range?
- Coherent scatter
- Compton effect
- photoelectric absorption
a. 1 only
b. 1 & 2 only
c. 2 & 3 only
d. 1, 2, &3
d. 1, 2, &3
- Which of the following refers to the measuring of the quantity of an x-ray beam?
a. Quality control
b. Quantity control
c. Beam assurance
d. Dosimetry
d. Dosimetry
The Becquerel (curie) is a measurement of which of the following?
a. Number of atoms in an element
b. Number of gamma rays emitted
c. Number of disintegrations per second
d. Number of possible radioisotopes
c. Number of disintegrations per second
- Radiation that leaves the tube housing by any means other than through the window is called:
a. Primary radiation
b. Scatter radiation
c. Leakage radiation
d. Remnant (exit) radiation
c. Leakage radiation
- Which of the following are by-products of photoelectric absorption?
- Photoelectron
- Characteristic x-ray
- Ionized atom
a. 1 & 2 only
b. 1 & 3 only
c. 2 & 3 only
d. 1, 2, and 3
d. 1, 2, and 3
What is the cumulative dose equivalent limits for 25 year old radiation worker?
a. 50 mSv (5 rem)
b. 100 mSv (10 rem)
c. 250 mSv (25 rem)
d. 350 mSv (35 rem)
c. 250 mSv (25 rem)
Which of the following is a major disadvantage of a film badge as a radiation monitoring device?
a. Radiation types cannot be determined
b. Immediate readings are not available
c. Must be changed monthly
d. They are grossly inaccurate
b. Immediate readings are not available
Where should a radiation worker’s radiation monitor be located if he is receiving a medical radiography exam?
a. On the collar of the patient gown
b. Lying on x-ray table - at eye level
c. Lying on x-ray table – waist high
d. Not in the radiographic room
d. Not in the radiographic room
Which of the following is the unit for biological dose?
a. Rad
b. Rem
c. RBE
d. Roentgen
c. RBE
What are the two general types of radiation detection devices?
a. Field survey and personnel monitoring
b. Survey meters and badges
c. Pocket and portable dosimeters
d. Particle and ray detectors
a. Field survey and personnel monitoring
Which of the following is the unit of measuring the activity of a radionuclide?
a. Rad
b. Rem
c. Curie
d. Roentgen
c. Curie
What do the letters LET stand for?
a. Lethal effective tolerance
b. Lethal exchange table
c. Linear energy transmutation
d. Linear energy transfer
d. Linear energy transfer
How does the energy of scatter radiation compare to that of the primary beam?
a. Less energy
b. More energy
c. Equal energy
d. Doubled energy
a. Less energy
How many milliroentgens are in one roentgen?
a. 10
b. 100
c. 1000
d. 5000
c. 1000
Which of the following refers to the fact that different types of radiation have different biological effects?
a. Roentgen
b. Rad
c. Rem
d. RBE
d. RBE
- How is the roentgen unit determined?
a. Absorbed dose
b. Ionization in air
c. Half-value layer
d. Compared with rem
b. Ionization in air
- During fluoroscopy which of the following will produce the greatest amount of scatter radiation?
a. Tube housing
b. Table top
c. Patient
d. Image intensifier
c. Patient
- The Coulomb/kg (roentgen) unit only applies to which of the following types of radiation?
a. Alpha
b. Beta
c. X and gamma rays
d. Background
c. X and gamma rays
- Why do film badge holders have filters inside?
a. To block alpha particles
b. To block beta particles
c. To prevent backscatter
d. To determine the radiation energies
d. To determine the radiation energies
Which of the following filters would produce an x-ray beam with the highest average photon energy?
a. 1 mm of Al
b. 2 mm of Al
c. 3 mm of Al
d. 4 mm of Al
d. 4 mm of Al
- Which of the following refers to the amount of ionizing radiation energy transferred by any type of radiation to any target material?
a. RBE
b. Rad
c. Rem
d. Roentgen
b
- Which of the following statements concerning the roentgen is true?
- It is measured by ions in air
- it only measures x and gamma rays
- measurement is affected by humidity
a. 1 only
b. 1 and 2 only
c. 1 and 3 only
d. 1, 2, & 3
d
- The density of a film badge is compared to which of these to determine the exposure to the worker?
a. Density standard
b. National standard
c. Control film badge
d. Fellow technologist’s film badge
c. Control film badge
- The rad, the rem and the roentgen will all be equal when measuring which type of radiation?
a. Alpha
b. Beta
c. X-ray
d. Neutrino
c
- A measure of the number of ion pairs produced in air by a quantity of x-rays defines which of these?
a. Rad
b. Rem
c. Joule
d. Roentgen
d
- The fact that some materials can store energy, then emit light when heated, is the principle that is used for which of these?
a. Ion detector
b. TLD
c. OSL
d. Proportional spectrometer
b. TLD
- Which of the following is the quantity of radiation received by radiation workers?
a. Rad
b. Rem
c. RBE
d. Roentgen
b. Rem
Which of the following measurements is equal to 1 joule per kilogram?
a. Gray
b. Sievert
c. RBE
d. Coulomb/kg
a. Gray