Exam Questions and Correct
Answers | New Update
Draft is measured by... - ANSWER ✔✔inches in water column
Definition of Draft - ANSWER ✔✔Difference of pressure INSIDE and
OUTSIDE the venting system
Easiest solution to "back puffing" stove? - ANSWER ✔✔Give it more
air
What has the greatest effect on FLOW? - ANSWER ✔✔Size of
venting system passageway
,A masonry chimney is required by what to have a cleanout if the flue
previously vented a solid or liquid fuel appliance? - ANSWER
✔✔NFPA 54 (National Fuel Gas Code)
High efficiency gas + oil appliances generate a lot of____ which
can____ - ANSWER ✔✔water vapor, deteriorate a chimney quickly
Info on use and installation of gas appliance draft hoods can be found
where? - ANSWER ✔✔National Fuel Gas Code
Category II, III, and IV appliance venting requirements can be found... -
ANSWER ✔✔in the installation instructions
Glazed creosote results from 3 things... - ANSWER ✔✔slow
smoldering fire,
too many elbows,
improperly sized vent
What is "pyrolysis"? - ANSWER ✔✔The chemical alteration of wood
as a result of the application of heat
Perfect combustion results in: - ANSWER ✔✔Only Co2 and water
vapor
, Creosote formation: - ANSWER ✔✔Tar fog or droplets of liquids
condense in the venting system
Residence time - ANSWER ✔✔length of time smoke remains in the
chimney
Magnetic thermometers only display about __% of actual flue temp -
ANSWER ✔✔50%
Creosote should be removed because... - ANSWER ✔✔Fire risk,
corrosive to steel, connectors, and mortar
Why should flashing be embedded in mortar? - ANSWER ✔✔prevent
leaks
Baffle location and purpose? - ANSWER ✔✔Located between the
firebox and flue collar.
Purpose is to complete better combustion
What does the barometric draft regulator do? - ANSWER
✔✔Prevents excessive draft
Smoke chamber height SHALL NOT be greater than the ______ ______
of the fireplace fire chamber. - ANSWER ✔✔Inside width
Combustion needs... - ANSWER ✔✔Heat, Oxygen, and Fuel
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