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EPA LEAD INSPECTOR EXAM PREP QUESTIONS AND ANSWERS RATED A+
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EPA LEAD INSPECTOR EXAM PREP QUESTIONS AND ANSWERS RATED A+
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EPA LEAD INSPECTOR EXAM PREPQUESTIONS AND ANSWERS RATED A+
What is sample size in multi-family housing based on? Correct
Answer the number of units to be tested (the sample size) is
based on the total number of units, similar common areas and
exterior in the building(s) and the date of construction as specified
in table 7.3
What information must the sample-size guarantee for housing
built before 1960? Correct Answer When all units, common areas,
or exterior sites tested are found to be clear of lead at or below
the 1.0 mg/cm^2 hazard, these sample sizes provide 95%
confidence that for housing built before 1960, fewer than 5% or
fewer than 50 (whichever is less) units, common areas, or exterior
sites at or above standard
What information must the sample-size guarantee for housing
built between 1960 and 1977? Correct Answer When all units,
common areas, or exterior sites tested are found to be clear of
lead at or below the 1.0 mg/cm^2 standard, these sample sizes
provide 95% confidence that for housing built between 1960-
1977, fewer than 10% or fewer than 50 (whichever is less) units,
common areas, or exterior sites at or above standard
In order to determine how many units to be tested in buildings
pre-1960 or unknown age, what should be calculated? Correct
Answer For pre-1960 or unknown-age buildings or developments
with 1,040 or more similar units, common areas, or exterior sites,
test 5.8% of them and round to the next whole number.
In order to determine how many units to be tested in buildings
built between 1960-1977, what should be calculated? Correct
Answer For 1960-77 buildings or developments with 1,000 or
,more units, test 2.9% of the units and round up any fraction to the
next whole number.
If a development was built in 1962 with 522 similar units, how
many units would be tested?
(reference table) Correct Answer 28 units
What is the first step in selecting units for inspection? Correct
Answer The first step in selecting units for inspection is to identify
(based on written documentation) buildings in the development
with a common construction and painting history. Such buildings
can be grouped together for sampling purposes.
What must the inspector obtain in order to develop a specific plan
on which units to test? Correct Answer 1. A complete listing of all
the units, unit numbers, and common areas in the development
2. information on the painting history of the development
3. listings or drawings of common-area components
4. information on building type and typical exterior components
the first task is to carry out a visual inspection to verify the
accuracy of the available information. Then must select the
specific set of units to be tested.
What is one option an inspector can chose when sampling a
multi-family housing development? Correct Answer One option is
to sample each unit and apply the result from each sample to the
unit it comes from. This is like doing a series of single-family
dwellings. Taking samples in every unit provides the most
detailed information, but costs a lot.
What is a second option an inspector can chose from when
sampling a multi-family housing development? Correct Answer A
second option is to sample just some of the units, selecting those
units by a scientifically valid approach, and then apply the results
,from those samples to the whole multifamily housing
development. This approach is useful for development of
modernization planning.
What is the equation for calculating a random unit to sample when
using a random number generator(0-1)? Correct Answer Unit
number = Round up from (random number X Total Project Size)
For example
Random number: 0.583 Total Project size: 55
55 x 0.583 is equal to 32.065, and rounding up from there which
is 33 so that means the 33rd unit on the list of 55 is to be
sampled.
What are some examples of nonrandom sampling that are not
permitted? Correct Answer - picking the first 10 units the inspector
visits
- picking units housing children
-picking only units on the first floor
- picking units where no one is home
In multi-family housing, how should you treat and test common
areas? ( such as building lobby, laundry rooms, hallway)? Correct
Answer In multifamily housing, each common area can be treated
like a dwelling unit. if there are multiple similar common areas,
they may be grouped for sampling purposes in exactly the same
way as regular dwelling units. However, dwelling units, common
areas, and exterior sites cannot be mixed together in a single
group.
How should you perform a substrate correction for MULTIFAMILY
housing? Correct Answer The method for correcting XRF
readings for substrate bias should be performed as described for
single family housing with one exception: one representative
location of a given substrate should be selected from each of
, TWO randomly chose units for each substrate type. When
available, vacant units are most often selected to minimize
damage to painted surfaces in occupied units.
What is a component type in multifamily housing? Correct Answer
A component type is a group of like components constructed of
the same substrate.
For example, grouping all walls would create an appropriate
component type if all walls are plaster. However, grouping all
doors would not be appropriate if some doors are metal and some
doors are wood.
What is the MINIMUM number of components of a given type that
must be tested in Multifamily housing? Correct Answer At least 40
components of a given type must be tested in order to obtain the
desired level of confidence in the results throughout the
multifamily housing development. IF fewer than 40 combinations
of a given component type are tested, additional combinations of
that component type will need to be tested.
On the multifamily housing -Component type report form, what
should be recorded for each component type? Correct Answer
Record the number and percentage of testing combinations
classified as either
1. Positive for lead based paint
2. inconclusive and having XRF readings less than the midpoint of
the XRF's inconclusive range (low inconclusive)
3. Inconclusive range and having XRF readings equal to or
greater than the midpoint of the XRF's inconclusive range (high
inconclusive)
4. negative for lead-based paint.
How are percentages computed for the classification of each
component type in MULTIFAMILY housing? Correct Answer The
percentages are computed by dividing the number in each
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