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CETP 4.1 Designing & Installing Exterior Vapor Distribution Systems fully solved
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CETP 4.1 Designing & Installing Exterior Vapor Distribution Systems fully solved
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CETP 4.1 Designing & Installing ExteriorVapor Distribution Systems fully solved
_____________ is the sum of the rated btu/hr input for each propane appliance connected to the vapor
distribution system. - correct answer ✔✔Total gas demand
Where do you record the ratings of the btu/hr input for a customers current appliances? - correct
answer ✔✔Customer gas appliance use profile form
_____________ is used to determine the amount of propane required to operate appliances at a
reduced demand, and assumes full cycle happen typically, and don't operate simultaneously. - correct
answer ✔✔Effective system load
Most critical issues when selecting a container: - correct answer ✔✔Customer's propane demand, above
or underground, and vaporization.
When a container is sized for vapor service, the goal is to ensure the _________________ is higher than
the demand of propane. - correct answer ✔✔Vaporization rate
when selecting/sizing a tank, it's important to consider if it will be ________________ or
______________. - correct answer ✔✔Above ground, underground
For underground tanks, it's important to consider __________ and ______________ - correct answer
✔✔Soil temperature, frost penetration
When sizing a container, it is important to consider the most lite conditions the container will operate in.
T/F? - correct answer ✔✔False
When determining container size, the temperature used for tank sizing should be the lowest
temperature anticipated. T/F? - correct answer ✔✔True
, NFPA 58 states all containers installed/filled at a customers home must be ___ ft in any direction from
combustibles. - correct answer ✔✔10
NFPA 58 states all containers installed/filled at a customers home must be ___ ft in any direction from an
above ground tank/ flammable liquid. - correct answer ✔✔20
NFPA 58 states all containers filled on site must be positioned so the fill connection, relief valve, and
liquid level gauge vent are ___ ft from sources of ignition. - correct answer ✔✔10
For DOT cylinders, 500+ gallons of total water capacity on a customers property must be ___ ft or further
from building. - correct answer ✔✔25
Above ground tanks with less than 125g water capacity may be placed next to a building and must be
___ ft away from any discharge. - correct answer ✔✔5
_________________ are the most common method used to join steel and wrought iron pipes in
residential/small commercial installs. - correct answer ✔✔Threaded fittings
Acceptable types of fittings include: - correct answer ✔✔Steel, malleable iron, ductile iron, press-
connect
____________ can be joined using manufacturer prescribed procedures like heat fusion, or mechanical
fittings. - correct answer ✔✔Polyethylene (PE) pipe
For underground installs, tracer wire ________ be in direct contact with the PE pipe. Must also be ___
AWG (american wire gauge). - correct answer ✔✔cannot, 14
________ is flexible, durable, and covered with a plastic sheath. The sheath should be protected as much
as possible to prevent corrosion. - correct answer ✔✔CSST (Corrugated Stainless Steel Tubing)
When sizing pipe/tubing for multiple second stage regulators, the line from the first stage regulator to
the second stage regulator must be sized based on the total btu/hr demand beyond any/all second stage
regulators. T/F? - correct answer ✔✔True
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