Deck 5: Radiation Monitoring

Question 1

Three different filters are incorporated into the detector packet of the optically stimulated luminescence dosimeter.Of what are these filters made?

A)Aluminum,tin,and copper
B)Aluminum,tin,and lead
C)Zinc,copper,and barium
D)Zinc,copper,and lead

Answer 1

Aluminum,tin,and copper

Question 2

Which of the following instruments generally has a check source of a weak,long-lived radioisotope located on one side of its external surface to verify its constancy daily?

A)Pocket dosimeter
B)Proportional counter
C)Geiger-Muller survey meter
D)Ionization chamber-type survey meter

Answer 2

Geiger-Muller survey meter

Question 3

Because of the OSL dosimeter's sensitivity down to as low as 10 µSv for x-ray and gamma ray photons in the energy range 5 keV to 40 MeV,it is an excellent and practical monitoring device for

A)employees working in high-radiation environments and for non-pregnant workers.
B)employees working in low-radiation environments and for pregnant workers.
C)members of the general public not occupationally employed.
D)Pregnant employees working in high-radiation environments.

Answer 3

employees working in low-radiation environments and for pregnant workers.

Question 4

Of the following,which are disadvantages of using pocket ionization chambers as personnel dosimeters?
1)They can discharge if they are subjected to mechanical shock.
2)Because these devices provide no permanent legal record of exposure,health care facilities that use this method to record personnel exposure must delegate someone to keep such a record.
3)If not read each day,the dosimeter may give an inaccurate reading because the electric charge tends to escape.

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

Question 5

Which of the following personnel dosimeters resembles an ordinary fountain pen externally?

A)Personnel digital ionization dosimeter
B)Optically stimulated luminescence dosimeter
C)Pocket ionization chamber
D)Thermoluminescent dosimeter

Question 6

What do optically stimulated luminescence dosimeters,thermoluminescent dosimeters,pocket ionization chambers,and digital ionization dosimeters have in common?

A)These devices are all used for area monitoring.
B)These devices all use the same sensing material to detect ionizing radiation.
C)These devices are all used for personnel monitoring.
D)Each of these devices can only be used for personnel monitoring for a maximum of 6 months.

Question 7

Three different filters are incorporated into the detector packet of the optically stimulated luminescence (OSL)dosimeter.These filters are respectively made of
1)aluminum.
2)copper.
3)molybdenum.
4)rhenium tungsten.
5)tin.

A)1,2,and 3 only
B)1,2,and 4 only
C)1,2,and 5 only
D)2,4,and 5 only

Question 8

Which of the following is not a requirement that radiation survey instruments must meet?

A)They must all be equally sensitive in the detection of ionizing radiation.
B)They should be able to detect all common types of ionizing radiation.
C)They should be calibrated annually to ensure accurate operation.
D)They should interact with ionizing radiation similarly to the way human tissue reacts.

Question 9

When changing employment,what must a radiation worker convey to his/her new employer?

A)A list of all fluoroscopic procedures performed daily
B)A list of all radiographic procedures performed daily
C)Data pertinent to accumulated permanent equivalent dose to be placed on file
D)A report of all procedures performed when "on call" after regular hours

Question 10

When the sensing crystals contained in the thermoluminescent dosimeter are irradiated,which of the following occurs?

A)The protons in the crystalline lattice structure of the LiF molecule absorb energy and are excited to a higher energy level or bands.
B)The neutrons in the crystalline lattice structure of the LiF molecule absorb energy and are excited to a higher energy level or bands.
C)Some of the electrons in the crystalline lattice structure of the LiF molecule absorb energy and are excited to higher energy levels or bands.
D)The electrons freed from the LiF molecule are trapped at a lower energy level or bands.

Question 11

Which component(s)of the Geiger-Muller survey meter alerts the operator to the presence of ionizing radiation?

A)The shield covering the probe's sensitivity chamber
B)An audio amplifier and speaker
C)The metal that encloses the counter's gas-filled tube
D)The meter scale

Question 12

The front of the white paper packet of the optically stimulated luminescence (OSL)dosimeter

A)may be color coded to facilitate correct usage and placement of the dosimeter on the body of occupationally exposed personnel.
B)must not have any type of printing on it.
C)must be radiopaque.
D)must never be exposed to ionizing radiation.

Question 13

Which of the following are advantages of the personnel digital ionization dosimeter?
1)Instant access to reports
2)No waiting time for mailing dosimeters
3)Lightweight and durable
4)Can be dropped or scratched with little chance of harm to the device

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

Question 14

An ionization chamber connected to an electrometer is a device that can measure

A)electromagnetic force.
B)tiny electric currents with high precision and accuracy.
C)potential difference.
D)Voltage in an x-ray machine circuit.

Question 15

Which of the following devices contains an aluminum oxide detector?

A)Digital ionization dosimeter
B)Optically stimulated luminescence dosimeter
C)Pocket ionization chamber
D)Thermoluminescent dosimeter

Question 16

What is the maximum period of time that a thermoluminescent dosimeter (TLD)may be worn as a personnel device?

A)1 hour
B)1 week
C)1 month
D)3 months

Question 17

The digital ionization dosimeter provides an instant read-out of dose information when connected to a computer via a connector such as a (an)

A)universal serial bus (USB).
B)charge-coupled device.
C)electrometer.
D)ionization chamber.

Question 18

The effective atomic number (Zeff)of lithium fluoride (LiF)is equal to

A)5.9.
B)6.4.
C)7.0.
D)8.2.

Question 19

Medical physicists use ionization chambers connected to electrometers to perform the annual standard measurements required by state,federal,and health care accreditation organizations for radiographic and fluoroscopic devices.These annual measurements include
1)x-ray output in Gy or mGy.
2)fluoroscopic radiation entrance rates in mSv/min.
3)kVp setting accuracy.
4)exposure time exactness.
5)half-value layers,or beam quality

A)1,2,and 3 only
B)1,3,and 4 only
C)2,3,and 5 only
D)1,2,3,4,and 5

Question 20

Which of the following instruments is called a cutie pie?

A)Geiger-Muller survey meter
B)Ionization chamber-type survey meter
C)Optically stimulated luminescence dosimeter
D)Proportional counter

Question 21

Which of the following personnel monitoring devices can be used to provide an immediate exposure readout for a radiation worker?
1)Personnel digital ionization dosimeter
2)Optically stimulated luminescence dosimeter without an in-house reader
3)Pocket ionization chamber
4)Thermoluminesence dosimeter

A)1 and 2 only
B)1 and 3 only
C)1 and 4 only
D)2 and 4 only

Question 22

Some of the advantages of the optically stimulated luminescence (OSL)dosimeter are
1)can be used for up to 1 year.
2)lightweight,durable,and easy to carry.
3)integrated,self-contained,preloaded packet.

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

Question 23

The optically stimulated luminescence (OSL)dosimeter is "read out" by using a (an)

A)densitometer.
B)ionization chamber.
C)thermoluminescent analyzer.
D)laser light at selected frequencies.

Question 24

Which of the following is a disadvantage of the optically stimulated dosimeter?

A)Exposure not determinable on the day of occurrence without an in-house reader
B)Mechanical shock can cause false high reading.
C)No permanent,legal record of exposure
D)Not cost-effective for large numbers of personnel

Question 25

Whenever the letter "M" appears under the current monitoring period or in the cumulative columns of a personnel monitoring report,it signifies that a (an)

A)mistake has been made in recording the equivalent dose.
B)equivalent dose higher than the minimum measurable radiation quantity was recorded during that time.
C)equivalent dose below the minimum measurable radiation quantity was recorded during that time.
D)maximal equivalent dose has been exceeded during that time.