1.
The purpose of measuring occupational exposure is to:
Identify
undesirable practices and unexpected sources of high exposure
Promptly apply controls to limit exposure
Provide information regarding exposure of the
individual, permitting a comparison with long-term limits
All
of the above
2.
Personnel monitoring for external exposure shall be performed on all
occupationally exposed individuals who may receive >___% of the applicable
MPD during the normal course of their duties or through accidental exposure
5
10
15
20
25
3.
Which of the following occasional visitors must be badged?
Messengers
Servicemen
Deliverymen
All
of the above
None
of the above
4.
Long term visitors to controlled areas should be regarded as
occupationally exposed persons if it is likely that they will receive a dose
equivalent exceeding ______ mRem per year.:
5
10
50
100
500
5.
The
ideal personnel monitoring device must accurately measure the biological dose
in Rems received by parts of the body considered to be most vital from the
standpoint of chronic low level exposure, i.e.,
Bone
marrow and gonads
Skin and bones
Spleen and liver
Heart and lungs
Breast
and thyroid
6. Measurement
of internal radiation dose must be independent of
Type of radiation producing the internal dose
Energy of radiation producing the dose
Both
answers are correct
Neither answers are correct
9.
Exposure
records MUST BE furnished to
which ONE of the following:
Any currently employed occupational worker who
requests it- on a quarterly basis
Any formerly employed occupational worker who
requests it- within 24 hours
The
individual and the NRC/State in the case of an overexposure- within 30 days
A colleague requesting it on behalf of a former
employee
10.
Personnel monitoring devices:
Are designed to measure the accumulated external
exposure and internal dose that a person receives over a time interval
Are integrating devices
Provide an instantaneous readout of the dose rate at
a specific moment in time
A
and B only
All of the above
13.
Which ONE of the following statements regarding film badges is false?
They are the most popular type of monitoring device
They contain a lithium fluoride chip functioning as a
thermoluminescent dosimeter
They contain photographic emulsion mounted in plastic
and then over-wrapped in light-tight paper
They are designed to measure whole body exposure
They are able to distinguish the type of radiation to
which wearer is exposed
14.
Film badges can distinguish among different energy photons because...
They contain internal circuitry sensitive to
different photon energies
They contain small metallic filters of different
densities, enabling them to distinguish among higher energy photons
They contain a lithium fluoride chip functioning as a
thermoluminescent dosimeter
They
only absorb the lowest energy photons
15.
The
companies that determine our exposure from film badges...
Read the values off a “glow curve”
Use
an optical densitometer
Measure the weight of the film badge before and after
use to determine amount of silver bromide that has been converted to elemental
silver by ionizing radiation
None
of the above
16.
Which of the following statements regarding film badges is FALSE?
They provide a permanent record of individual
exposure
Relatively inexpensive
Require no technical knowledge of user
They
are sensitive down to the 3 mR level
It takes several weeks to obtain results of film
badge monitoring
17.
TLD
ring badges are very important for
individuals involved in eluting generators, preparing kits, and injecting
patients. Which ONE of the following statements is TRUE?
Thermoluminescent dosimeters typically contain the
phosphor lanthanum fluoride
TLDs trap protons excited by exposure to ionizing
radiation
TLDs are used one time and then discarded
The TLD is heated and the amount of light emitted is
compared to a “glow curve” to determine radiation exposure
TLDs are unreliable above about 1000 mRem
18.
Which of the following statements
regarding pocket dosimeters is TRUE?
Pocket Dosimeters are useful in those situations in which large
exposures are expected on an infrequent schedule.
A “Glow Curve” is required to obtain a reading
of the absorbed dose
A pocket dosimeter is considered an integrating
device
A
and C only
None
of the above
19.
Which of the following statements
regarding pocket dosimeters is TRUE?
Compared to a TLD, a Pocket Dosimeters is a fragile
device
Pocket dosimeters can give both instantaneous and
integrated reading
A pocket dosimeter is more expensive than a film
badge
A
and C only
None
of the above
20. To
measure the absorbed radiation dose during a 4-hr visit to a radiopharmacy,
which of the following devices would be the most appropriate one to use?
GM Counter
Film badge
TLD
Pocket
Dosimeter
