PRACTICE EXAM QUESTIONS WITH
CORRECT DETAILED ANSWERS |
ALREADY GRADED A+<RECENT
VERSION>
1) Draft is measured by... - answer inches in water column
2) Definition of draft - answer difference of pressure inside and outside
the venting system
3) Easiest solution to "back puffing" stove? - answer give it more air
4) What has the greatest effect on flow? - answer size of venting system
passageway
5) 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)
6) High efficiency gas + oil appliances generate a lot of____ which can____
- answer water vapor, deteriorate a chimney quickly
7) Info on use and installation of gas appliance draft hoods can be found
where? - answer national fuel gas code
,8) Category ii, iii, and iv appliance venting requirements can be found... -
answer in the installation instructions
9) Glazed creosote results from 3 things... - answer slow smoldering fire,
Too many elbows,
Improperly sized vent
10) What is "pyrolysis"? - answer the chemical alteration of wood
as a result of the application of heat
11) Perfect combustion results in: - answer only co2 and water
vapor
12) Creosote formation: - answer tar fog or droplets of liquids
condense in the venting system
13) Residence time - answer length of time smoke remains in the
chimney
14) Magnetic thermometers only display about __% of actual flue temp
- answer 50%
15) Creosote should be removed because... - answer fire risk,
Corrosive to steel, connectors, and mortar
16) Why should flashing be embedded in mortar? - answer prevent
leaks
17) Baffle location and purpose? - answer located between the
firebox and flue collar.
Purpose is to complete better combustion
,18) What does the barometric draft regulator do? - answer prevents
excessive draft
19) Smoke chamber height shall not be greater than the ______ ______
of the fireplace fire chamber. - answer inside width
20) Combustion needs... - answer heat, oxygen, and fuel
21) Nominal dimensions can vary by how much? - answer nominal
dimensions vary by 1/2"
22) What is combustion? - answer the rapid oxidation of fuel
producing heat and light.
23) Parging the smoke chamber improves flow by... - answer
reducing turbulence, and eliminating corbeling
24) Connector dampers should not block greater than ___% of the
connector when closed. - answer 80%
25) Heat reclaimer / extractor - answer fits inline with connector,
and is not to be used with wood burning
26) What inspection level determines if a wall pass-through is installed
properly? - answer level 2
27) Hearth stove should only be connected to... - answer a properly
built masonry fireplace
, 28) What problems are created when mortar joints between flue tiles
are not smoothed? - answer may create turbulence and increased
residence time of exhaust.
29) 3 positive aspects of cast-in-place liners - answer 1. Adds
structural integrity to chimney
2. Resists corrosive deposits
3. Able to support any fuel or appliance when sized properly
30) What never to do to a blocked passage in a chimney? - answer
never pound from above with a weight. (might block so bad opening a
wall is necessary to remove buildup)
31) True or false: a flat wire brush is hardest to reverse because of size
and thickness of bristles. - answer true
32) 1st choice of brush for oil passage flues and why? - answer
polypropylene (plastic) because they do not corrode or degrade from
corossive deposits
33) The best brush to remove glaze in the flue? - answer a chain
brush / rotary
34) Main purpose of a vacuum - answer to collect dust
35) Two purposes of a ridge hook - answer 1. Keep footing of
slippery / fragile roofs
2. Allow acces on steep roofs
36) Why use an aluminum ladder? - answer lighter and less
expensive over fiberglass