ASPE CPD Study Questions AH Exam with Verified Answers
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ASPE CPD
Institution
ASPE CPD
ASPE CPD Study Questions AH Exam with Verified Answers
1. Front Back
2. What is the specific weight of water? 62.4 lbs per cubic foot
3. What happens in a storm and sanitary sys-
tem after it passes the water test?
4. Is an air test acceptable for a storm and san-
itary system?
5. What are t...
ASPE CPD Study Questions AH Exam with Verified Answers
1. Front Back
2. What is the specific weight of water? 62.4 lbs per cubic foot
3. What happens in a storm and sanitary sys- A smoke pressure test
tem after it passes the water test? is recommended with a
smoke pressure of 1 in wc
to prove the system gas
tight.
4. Is an air test acceptable for a storm and san- Yes, if a water test is not
itary system? possible, at a pressure of 5
psi, are tests are impractical
and costly
5. What are the testing procedures for the A water test upon comple-
storm and sanitary system? tion of the rough piping and
prior to concealment of 10
ft wc minimum (except the
topmost 10 feet of pipe),
not to exceed 100 ft wc. If
system is higher than 100
feet, test plugs must be in-
stalled to facilitate testing,
rarely are more than 7 sto-
ries tested at one time. A
peppermint oil test may also
be done with 2 oz of pepper-
mint oil and 10 qt boiling wa-
ter, and searching for pep-
permint smell at leaks, how-
ever it is difficult to pinpoint
the leak by this method
6. The maximum length from the vent connec- To prevent a dead end
tion to any future drain outlet is required by where slime, sludge and
code, why, how long is the distance (listed in fungi can grow, 2 feet, un-
the book), and what’s the exception? less the piping must be ex-
, ASPE CPD Study Questions AH Exam with Verified Answers
tended to an accessible lo-
cation for a cleanout
7. A sanitary tee may be used in the vertical A double sanitary tee be-
but what may not be used in the vertical and cause the possibility of flow
why? crossover and excessive
pressures when one branch
is discharging and the other
isn’t are possible
8. What are the slopes of pipe inside the build- 1/4 in per foot for 3 in and
ing that correspond to 2 fps velocity? smaller 1/8 in per foot for
larger pipe all elbows, taps,
tees etc are tapped at a
pitch of 1/4” per foot
9. Where should cleanouts be provided? 1) Inside or outside the
building at the point of exit
(use a wye branch) 2) at
every change in direction
greater than 45 degrees
3) every 50 feet for piping
4” and less, and 100 ft
for larger piping 4) under-
ground piping larger than 10
in should be provided with
manholes at every change
in direction and every 150
feet 5) at the base of all
stacks 6) as required by
code
10. What size cleanouts are provided in piping? Piping up to 4 inches, the
cleanout is the same size as
the pipe. Piping greater than
4 inches, 4 inch cleanouts
are adequate.
, ASPE CPD Study Questions AH Exam with Verified Answers
11. A backwater valve or a com-
bination BWV with manu-
, ASPE CPD Study Questions AH Exam with Verified Answers
What should be installed in the house drain if ally operated gate valve.
there is a danger of backflow of sewage into The BWV does not interfere
the building? Whats the difference? with the airflow through-
out the system, and the
gate valve is recommend-
ed where there is a histo-
ry of backflow as a positive
means of protection.
12. Branch connections to the house drain At the upper portion of the
should be made where and why? pipe (above the 1/2 - 2/3
full mark) because: 1) there
is a lower chance of stop-
pages in the branch 2) there
is less flow interference at
the point of connection 3)
When there is no flow in the
branch, the full area of the
pipe is available to relieve
pneumatic pressure fluctua-
tions in the house drain
13. How many fixture units are equivalent to 1 2 FUs, sump pumps, ejec-
gpm continuous or semicontinuous flow and tors, air conditioning equip-
what are examples of these types of flow? ment, water cooled, equip-
ment, etc
14. What minimum slopes are required for build- 3 in pipe and smaller: 1/4
ing drains and why? in/ft 4-6 in pipe: 1/8 in/ft 8
in pipe and larger: 1/16 in/ft
to maintain 2 fps scouring
action if low flow fixtures are
present, 1/4 in/ft for all is a
good idea
15. House drains are designed to flow how full? 1/2 full to 3/4 full max under
uniform flow conditions
16. What is a house (building) drain? The lowest piping of a
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