Certi Radon Measurement| Brand
New Expert Exam Questions with
100% Correct Clear Verified
Answers| All Graded A+|Latest
Premium Update |100%
Guaranteed Success.
A curie is defined as: - Answer✅✅the radioactivity of one gram of radium.
A house was tested for radon and radon decay progeny. The results were 10 pCi/L
and 0.08 WL. What would most likely account for these measurements? -
Answer✅✅The ventilation rate is low and the air contains more RDPs due to
stagnancy. Using the equation ER= WL x 100/Rn shows ER=0.08 x 100/ 10 pCi/L= 0.8
or 80% which is well above the assumed 50%
A measurement of 2 WL is made in a home. Using typical equilibrium ratio
assumptions (50%), the radon concentration is: - Answer✅✅400 pCi/L
Rn= WL x 100/ ER
A measurement of 4 pCi/L is made in a home. Using typical equilibrium ratio
assumptions (50%), the working level is: - Answer✅✅WL= ER x Rn/100
0.5 x 4 pCi/L= 0.02 WL
A radioactive element, which has a half-life of 30 days, was collected in a sealed
container. If on January 1 it was determined that the container held 100 grams of
this specific element, how much of this same specific material would be in the
container as of June 1 of the same year? - Answer✅✅N(t) = N(o) (1/2)^(t/t half)
, where N(t) represents the final amount, N(o) represents the initial amount, t
represents the time elapsed, and t half represents the half-life for a material.
This would give you 3.125 grams left.
An equilibrium ratio of 50 percent is typically assumed in residential buildings. What
does this mean? - Answer✅✅Of the radon decay products produced from the
radon in the room only half are floating around and available for breathing or
measurement.
An ion is: - Answer✅✅an atom that has either gained or lost an electron
Assuming an equilibrium ratio of 0.5 (50%), 4 pCi/L equates to how many working
levels? - Answer✅✅WL= (ER x Rn)/100
WL= 0.02
Cleaning the air with an electronic air cleaner or a high efficiency air filter (HEPA)
filter will: - Answer✅✅Change the equilibrium ratio but not affect the radon gas
levels appreciably. Air filters only collect RDPs
True or False: Dynamic equilibrium is the time that it takes after a house is closed
for the entry of radon to equal the rate at which radon escapes through shell
openings and decays. - Answer✅✅True
EPA and OSHA recommend/state that radon workers not be exposed to more than:
- Answer✅✅4 WLM/year
For a house with an equilibrium ratio of 0.2 (20%) and a WL measurement of 0.02,
the corresponding radon concentration would be: - Answer✅✅Rn= (WL x 100)/ER
Rn= (0.02 x 100)/0.2 =10.0 pCi/L
How many disintegrations per minute are associated with 1 pCi of radioactivity? -
Answer✅✅2.2
In addition to radioactivity, which of the following are characteristics of radon? -
Answer✅✅Naturally occurring, chemically inert. gaseous
In comparison to alpha particles, what damage do beta particles cause in the lungs?
- Answer✅✅Beta particles causes 20 times less damage than does an alpha particle.
True or False: More recent EPA publications cite the equilibrium factor as 40 percent
rather than 50 percent - Answer✅✅True
RDP measurements are reported in: - Answer✅✅Working Levels (WL)
Radon-222 is directly produced by the radioactive decay of: - Answer✅✅Radium-
226
New Expert Exam Questions with
100% Correct Clear Verified
Answers| All Graded A+|Latest
Premium Update |100%
Guaranteed Success.
A curie is defined as: - Answer✅✅the radioactivity of one gram of radium.
A house was tested for radon and radon decay progeny. The results were 10 pCi/L
and 0.08 WL. What would most likely account for these measurements? -
Answer✅✅The ventilation rate is low and the air contains more RDPs due to
stagnancy. Using the equation ER= WL x 100/Rn shows ER=0.08 x 100/ 10 pCi/L= 0.8
or 80% which is well above the assumed 50%
A measurement of 2 WL is made in a home. Using typical equilibrium ratio
assumptions (50%), the radon concentration is: - Answer✅✅400 pCi/L
Rn= WL x 100/ ER
A measurement of 4 pCi/L is made in a home. Using typical equilibrium ratio
assumptions (50%), the working level is: - Answer✅✅WL= ER x Rn/100
0.5 x 4 pCi/L= 0.02 WL
A radioactive element, which has a half-life of 30 days, was collected in a sealed
container. If on January 1 it was determined that the container held 100 grams of
this specific element, how much of this same specific material would be in the
container as of June 1 of the same year? - Answer✅✅N(t) = N(o) (1/2)^(t/t half)
, where N(t) represents the final amount, N(o) represents the initial amount, t
represents the time elapsed, and t half represents the half-life for a material.
This would give you 3.125 grams left.
An equilibrium ratio of 50 percent is typically assumed in residential buildings. What
does this mean? - Answer✅✅Of the radon decay products produced from the
radon in the room only half are floating around and available for breathing or
measurement.
An ion is: - Answer✅✅an atom that has either gained or lost an electron
Assuming an equilibrium ratio of 0.5 (50%), 4 pCi/L equates to how many working
levels? - Answer✅✅WL= (ER x Rn)/100
WL= 0.02
Cleaning the air with an electronic air cleaner or a high efficiency air filter (HEPA)
filter will: - Answer✅✅Change the equilibrium ratio but not affect the radon gas
levels appreciably. Air filters only collect RDPs
True or False: Dynamic equilibrium is the time that it takes after a house is closed
for the entry of radon to equal the rate at which radon escapes through shell
openings and decays. - Answer✅✅True
EPA and OSHA recommend/state that radon workers not be exposed to more than:
- Answer✅✅4 WLM/year
For a house with an equilibrium ratio of 0.2 (20%) and a WL measurement of 0.02,
the corresponding radon concentration would be: - Answer✅✅Rn= (WL x 100)/ER
Rn= (0.02 x 100)/0.2 =10.0 pCi/L
How many disintegrations per minute are associated with 1 pCi of radioactivity? -
Answer✅✅2.2
In addition to radioactivity, which of the following are characteristics of radon? -
Answer✅✅Naturally occurring, chemically inert. gaseous
In comparison to alpha particles, what damage do beta particles cause in the lungs?
- Answer✅✅Beta particles causes 20 times less damage than does an alpha particle.
True or False: More recent EPA publications cite the equilibrium factor as 40 percent
rather than 50 percent - Answer✅✅True
RDP measurements are reported in: - Answer✅✅Working Levels (WL)
Radon-222 is directly produced by the radioactive decay of: - Answer✅✅Radium-
226
