GENERIC RADIATION WORKER TRAINING
CERTIFICATION EVALUATION TEST 2026
PRACTICE SOLUTION QUESTIONS AND
ANSWERS
●● Beta Radiation.
Answer: Penetrating Ability: Travels a few feet in the air
Shielded by: Lightweight plastic or aluminum
Type Hazard: Eyes and skin are most susceptible to beta radiation. It can
be an internal hazard
Major Source: Most beta particles come from activated corrosion and
fission products
Additional Info: Personnel must work close to a beta source to receive
much dose
●● Gamma Radiation.
Answer: Penetrating Ability: Very high, penetrates the whole body
Shielded by: Very dense material; usually lead and steel
Type Hazard: Whole body dose hazard
Major Source: Fission, fission products, and activation products in the
primary system piping
Additional info: Has no mass or electrical charge - it is pure energy
,●● Neutron Radiation.
Answer: Penetrating Ability: Very high
Shielded by: Water, paraffin, or concrete
Type Hazard: whole body dose hazard
Major Source: Mainly a problem only near the reactor in operation
Additional Info: Neutrons are freed from the nucleus by decay or fission
and have no electrical charge
●● Define TEDE.
Answer: Total Effective Dose Equivalent. This is the total of a person's
external dose and internal dose
●● Define External Dose.
Answer: Comes from radiation sources located outside the body. The
entire body, inside and out, receives the dose. Most of the dose received
by nuclear workers is external
●● Define Internal Dose.
Answer: Comes from radioactive material deposited inside the body. The
majority of this dose is to the organ(s) where the radioactive material is
deposited. This normally occurs if a person gets radioactive material
inside the body by breathing it in or swallowing it.
●● When is the highest risk to a cell?.
,Answer: The highest risk to a cell from radiation exposure is during cell
division
●● Define Chronic Radiation Exposure.
Answer: A series of small doses spread out over a long period such as
months or years
●● Define Acute Radiation Exposure.
Answer: A large dose received in a short period, usually less than 24
hours. During normal nuclear power plant activities, workers should not
be exposed to sources of radiation that will result in acute exposure.
●● Define Somatic Effects of radiation exposure.
Answer: Occur in JUST the individual who has received the radiation
dose. Somatic simply means "something affecting the whole body." Any
cell damage would be to the cells of the person exposed to the radiation.
●● How are Somatic Effects manifested?.
Answer: Prompt Effects and Delayed Effects
●● Define Prompt Effects.
Answer: Observed as the result of a large acute dose usually shortly after
the exposure. Nuclear workers do not receive radiation level this high.
, ●● Define Delayed Effects.
Answer: Occur months or years after exposure and may result from
acute or chronic radiation exposure. EX: Cancer, cataracts. The delay in
time creates a problem in linking exposure w/ the outcome.
●● Define Genetic Effects of radiation exposure.
Answer: Appear in future children of an individual who received the
dose. The chances of their occurring are very small even with radiation
exposure much higher than that experienced by nuclear workers.
NOTE: The probability of occupational exposure producing a genetic
mutation in a worker's offspring is extremely remote.
●● Define Radiosensitivity.
Answer: Cell reproduction slows as you age, so younger people are
more sensitive to radiation than older people are. Therefore, unborn
children are more sensitive than infants and infants are more sensitive
than older children, and so on.
●● What is the purpose of the NRC Form-4.
Answer: It is used to record your dose. It is required to be updated w/
previous occupational exposure during the calendar year before a worker
may receive more dose than members of the general public. It is your
responsibility to ensure that all dose for the calendar year is reported
before starting work. You can review dose history at any time by
contacting proper department.
CERTIFICATION EVALUATION TEST 2026
PRACTICE SOLUTION QUESTIONS AND
ANSWERS
●● Beta Radiation.
Answer: Penetrating Ability: Travels a few feet in the air
Shielded by: Lightweight plastic or aluminum
Type Hazard: Eyes and skin are most susceptible to beta radiation. It can
be an internal hazard
Major Source: Most beta particles come from activated corrosion and
fission products
Additional Info: Personnel must work close to a beta source to receive
much dose
●● Gamma Radiation.
Answer: Penetrating Ability: Very high, penetrates the whole body
Shielded by: Very dense material; usually lead and steel
Type Hazard: Whole body dose hazard
Major Source: Fission, fission products, and activation products in the
primary system piping
Additional info: Has no mass or electrical charge - it is pure energy
,●● Neutron Radiation.
Answer: Penetrating Ability: Very high
Shielded by: Water, paraffin, or concrete
Type Hazard: whole body dose hazard
Major Source: Mainly a problem only near the reactor in operation
Additional Info: Neutrons are freed from the nucleus by decay or fission
and have no electrical charge
●● Define TEDE.
Answer: Total Effective Dose Equivalent. This is the total of a person's
external dose and internal dose
●● Define External Dose.
Answer: Comes from radiation sources located outside the body. The
entire body, inside and out, receives the dose. Most of the dose received
by nuclear workers is external
●● Define Internal Dose.
Answer: Comes from radioactive material deposited inside the body. The
majority of this dose is to the organ(s) where the radioactive material is
deposited. This normally occurs if a person gets radioactive material
inside the body by breathing it in or swallowing it.
●● When is the highest risk to a cell?.
,Answer: The highest risk to a cell from radiation exposure is during cell
division
●● Define Chronic Radiation Exposure.
Answer: A series of small doses spread out over a long period such as
months or years
●● Define Acute Radiation Exposure.
Answer: A large dose received in a short period, usually less than 24
hours. During normal nuclear power plant activities, workers should not
be exposed to sources of radiation that will result in acute exposure.
●● Define Somatic Effects of radiation exposure.
Answer: Occur in JUST the individual who has received the radiation
dose. Somatic simply means "something affecting the whole body." Any
cell damage would be to the cells of the person exposed to the radiation.
●● How are Somatic Effects manifested?.
Answer: Prompt Effects and Delayed Effects
●● Define Prompt Effects.
Answer: Observed as the result of a large acute dose usually shortly after
the exposure. Nuclear workers do not receive radiation level this high.
, ●● Define Delayed Effects.
Answer: Occur months or years after exposure and may result from
acute or chronic radiation exposure. EX: Cancer, cataracts. The delay in
time creates a problem in linking exposure w/ the outcome.
●● Define Genetic Effects of radiation exposure.
Answer: Appear in future children of an individual who received the
dose. The chances of their occurring are very small even with radiation
exposure much higher than that experienced by nuclear workers.
NOTE: The probability of occupational exposure producing a genetic
mutation in a worker's offspring is extremely remote.
●● Define Radiosensitivity.
Answer: Cell reproduction slows as you age, so younger people are
more sensitive to radiation than older people are. Therefore, unborn
children are more sensitive than infants and infants are more sensitive
than older children, and so on.
●● What is the purpose of the NRC Form-4.
Answer: It is used to record your dose. It is required to be updated w/
previous occupational exposure during the calendar year before a worker
may receive more dose than members of the general public. It is your
responsibility to ensure that all dose for the calendar year is reported
before starting work. You can review dose history at any time by
contacting proper department.
