Chimneys, Stoves, and Fireplaces Flashcards
(139 cards)
1
Q
Footings for masonry chimneys must be made of concrete or solid masonry and be at least this thick?
A
12-inches.
2
Q
How far should the footing for a masonry chimney extend beyond the face of the fireplace or foundation wall on all sides?
A
At least 6- inches
3
Q
Footings for masonry fireplaces must extend below what line?
A
The frost line.
4
Q
How far should house framing components be from the chimney wall?
A
At least 2- inches
5
Q
What height rule should masonry chimneys follow?
A
The 3, 2, 10
6
Q
Where should inlets on a masonry chimney enter?
A
From the side.
7
Q
If single-wall metal pipe is used as a vent connector, what is the minimum clearance to combustibles?
A
18 inches
8
Q
Which chimneys must be lined?
A
All masonry
9
Q
Unlined chimneys are not safe. Any chimney without a flue lining should be reported as a what?
A
A Material defect
10
Q
What’s the minimum standard thickness for a flue lining?
A
5/8-inch thick.
11
Q
Clay flue lining should protrude a minimum of how far above the top brick course or masonry cap?
A
4 inches.
12
Q
Wood-burning, gas, or oil applications need a flue vent with what type of liner?
A
Stainless steel
13
Q
What is an inexpensive alternative vent material only for certain medium-efficiency gas heating systems?
A
Aluminum
14
Q
Which chimney lining is smooth, seamless stack, and suitable for all fuels?
A
A cast-in-place
15
Q
The height requirements for chimney terminations (per the 3-2-10 Rule) do not apply to these?
A
Fuel vents.
16
Q
A greater vent height above the roof is needed as the roof pitch approaches being a what?
A
A vertical surface
17
Q
A venting system is not permitted to extend into or pass through these HVAC components?
A
Air ducts or furnace plenums
18
Q
How many heating system should a single flue be used for?
A
One
19
Q
Gas vents that are greater than 12 inches in diameter or located less than 8 feet from a vertical structure should follow what rule?
A
2-2-10
20
Q
Efflorescence on a chimney’s brickwork below the roof line may indicate that there is a leak where ?
A
At the roof flashing
21
Q
If combustibles project out an 1-1/2 or more from the fireplace, how far above the opening should they be?
A
12-inches
22
Q
A fireplace with a 6 square foot or less opening requires a minimum hearth of ?
A
16 inches in front and 8 inches on each side.
23
Q
Zero-clearance fireplaces do require a clearance from combustibles at the _____ of the fireplace?
A
Top.
24
Q
Type B vents should only be used with appliances that are equipped with a draft hood and burn either one of these two types of fuel ?
A
Natural gas or LP
25
Type B vents can not be used on appliance that produces flue gases that exceed what temperature?
480° F
26
Which type of vent must be equipped with its own special chimney caps?
Type B
27
Which vent pipe is commonly used for water heaters, furnaces, boilers, wall heaters and space heaters that burn natural gas or LP?
Type B
28
Type B is a double-wall vent made of what?
Galvanized metal and aluminum.
29
What is the clearance from combustibles for Type B pipe ?
1 inch
30
The vent type should be clearly printed on where?
The vent pipe itself.
31
Which type of vent pipe should never be used with wood-burners, incinerators, oil-fired or coal-fired appliances, or any appliances that burn anything other than liquid petroleum or natural gas.
Type B
32
Type L vent pipe has an inner wall made of what?
Stainless Steel
33
Type L vent gasses should not exceed what?
570 degrees.
34
What is Type L's minimum distance from combustibles?
3-inches
35
Type L is used for which type of fuels?
Oil and natural gas.
36
Type L should not be used to vent which appliances?
Coal or wood-fired.
37
Type L has a min-max height of what?
6 and 30 feet.
38
What is the height rule for Type L vent?
2-2-10
39
All masonry chimneys should have one of these made of concrete, metal or stone to help protect it from rain and snow?
A cap
40
The chimney cap should have this to help shed rain?
Drip edge
41
There should be a caulked bond break around the what?
Flue liner
42
What's the minimum over hang for a chimney crown/cap on all sides?
2 inch
43
How far above the chimney crown should a flue liner project?
4 inch minimum
44
What size screen openings should a spark arrestor have?
3/8 to 1/2 inch
45
Most masonry chimneys have an inadequate cap because they were constructed using what?
Common mortar mix
46
What's the minimum concrete thickness for a fireplace hearth?
4 inches
47
What's the bearing length of each end of a lintel?
4-inches
48
Most fireplaces are sized large enough to receive a piece of firewood cut how long?
2-foot-long
49
How deep should the firebox of a concrete/masonry fireplace be?
20 inches
50
Firebrick or other approved lining material inside the firebox should be how thick?
At least 2 inches
51
The back and side walls behind the lining should be made of what material?
Solid masonry
52
A firebox's back/sidewalls with a firebrick liner should have a total thickness of what?
8-inches
53
The width of the mortar joints of the firebrick lining should not exceed what width?
1/4-inch
54
If there's no firebrick lining inside the firebox, then the back and side walls should be solid brick and how thick?
10 inches
55
The angle of the back wall is called what?
Splay
56
Splay slope is usually how much per foot?
5-inches per
57
Refractory mortar is specified but ______ used.
Seldom
58
What controls the efficiency of a fireplace?
The throat
59
The damper must be operable from the room containing what?
The fireplace
60
Manually operated dampers can be installed only in connectors or chimneys serving fireplaces and stoves that burn what type of fuel?
Solid-fuel
61
The top of the flue clean-out opening needs to be a minimum of how far from the lowest inlet?
6 inches
62
What's the minimum height of a flue clean-out opening?
6 inches
63
Exterior air intake must not be located in what two areas?
The garage or basement of the house.
64
Factory-Built Chimneys
| T/F: A chimney cap must be installed on top of the flue pipe.
True
65
Factory-Built Chimneys:
If a factory-built chimney is used with a solid-fuel burner or an appliance with corrosive gases, the inside flue pipe should be either one of these?
Stainless steel or a porcelain-coated surface.
66
Factory-Built Fireplace:
| The refractory panel walls require replacement if this can be inserted into the crack?
A nickel
67
Factory-Built Fireplace:
| The panels require replacement if the original surface has abraded by this much?
1/4-inch
68
Factory-Built Fireplace:
| Who should replace the refractory panels?
A qualified professional
69
Wood-Burning Stoves:
In which type of stove does the smoky exhaust pass through a coated, ceramic honeycomb that ignites particulates and smoke gases.
A catalytic stove.
70
Wood-Burning Stoves:
| What should never be used because it burns significantly hotter than wood and would pose a fire hazard?
Coal
71
What is the minimum distance above a fireplace opening for any combustible that projects out an 1 1/2 or less?
6-inches
72
What is the minimum distance above a fireplace opening for any combustible that will project out more than an 1 1/2?
12-inches
73
Combustible materials should be kept away from the fireplace opening a minimum of how far?
3 feet
74
Hearths not made of concrete or masonry and have a thickness of less than 4 inches should be written up as?
A defect
75
Hearths should have a minimum thickness of?
2 inches
76
Single-Wall Metal Chimney:
| Heat shields/wall protectors should have an air gap of at least?
1-inch
77
Single-Wall Metal Chimney:
| Should not be used in what type of dwellings?
One- and two-family
78
Single-Wall Metal Chimney:
| How far away from wood framed walls or combustible materials should they be kept?
18 inches
79
Single-Wall Metal Chimney:
| Under 18 inch diameter should be kept how far away from non-combustible walls?
At least 2 inches
80
Single-Wall Metal Chimney:
| 18 inches and up in diameter should be kept how far away from non-combustible walls?
At least 4 inches
81
Flues and connectors should not be this material?
Galvanized metal.
82
Metal flues should be free of what?
Rust and corrosion
83
Every masonry chimney should be what?
Lined
84
A solid fuel-burning appliance vent should have a rise to the chimney of what ?
1/4-inch per foot
85
Masonry Chimney:
| Where should a smaller vent pipe be connected to the chimney in relation to a larger one?
Above it
86
If two or more vent connector enter one chimney flue or vent, how must the pipe penetrations be made?
At different levels
87
If two or more vent connector pipes do enter a chimney flue or vent at the same level, the connectors must be made at what angle?
45 degree or less.
88
How far should combustible materials be kept from a fireplace's cleanout door?
18 inches
89
When inspecting a cleanout door they should be unobstructed and do this?
Close tightly
90
The cleanout opening for a masonry chimney must be located how close to the base of the flue?
Within 6 inches
91
An interior flue clean-out should be how far above the lowest accessible floor level?
16 inches.
92
A smoke/CO monitor should be located where?
In the same room as the fireplace.
93
How far above the fireplace opening should a throat or damper be located?
8 inches
94
A damper should be checked for proper operations and what?
Rust or corrosion.
95
Hearths that are not made of concrete, masonry and less than 4 inches are considered what?
Defects
96
A chimney that passes through a combustible roofs requires what?
A thimble
97
Should chimney crowns be flat or sloped?
Sloped
98
The space around and between chimney liners should not be used as what?
A vent
99
A chimney may contain more than one flue. If it does, the flues must be separated by a solid masonry partitions of what thickness?
4 inch
100
It is a common mistake to apply chimney termination _________ requirements to fuel vents.
height
101
The inspector should inspect the bases of chimney flues for distances that are not between ____ and 12 inches below the bottom edges of their cleanout openings.
6
102
Factory-built or masonry fireplaces must be provided with an exterior air supply to assure proper fuel combustion, unless the room is _______
mechanically ventilated
103
The cross-sectional area of a chimney flue is based on the _______ of the fireplace opening.
area
104
Mortar between the bricks or stones that crumbles when poked with a screwdriver is considered a _____ condition.
defective
105
The inspector should inspect for chimneys that terminate less than __________ feet above the highest point where they pass through the roof surface.
3
106
__________ stoves have three characteristics that assist complete, clean combustion: pre-heated combustion air introduced from above the fuel; firebox insulation; and a large baffle.
Non-catalytic
107
_________ built chimneys are NOT required to be of masonry construction.
Factory
108
_____ from wood stoves can cause a variety of health ailments, from asthma to cancer.
Smoke
109
You may find a properly installed _______ from a gas-fired furnace and a gas-fired water tank
connected into one flue.
Vent
110
The top of a factory-built fireplace's chimney has a _____ to divert rainwater from the chimney pipe to the chimney flashing.
storm collar
111
The inspector should inspect the bases of chimney flues for distances that are not between ____ and 12 inches below the bottom edges of their cleanout openings.
6
112
Factory-built or masonry fireplaces must be provided with an exterior air supply to assure proper fuel combustion, unless the room is what?
mechanically ventilated
113
How often should a chimney or wood stove be inspected and cleaned by a certified chimney specialist?
every year
114
A factory-built fireplace can have a clearance of what to combustibles?
zero
115
Disposing of ashes from a wood stove using a central vacuum system is considered what?
unsafe
116
If a ventless fireplace is oversized for the square footage of the area to be heated, it is still considered?
Safe
117
The openings through which the chimneys of factory-built fireplaces pass should be blocked with support boxes and?
fire-stop spacers
118
What can create pressure that is greater than the structural strength of concrete, which can be between 2,000 to 3,000 psi?
osmosis
119
What is the recommend rise of the vent connector coming directly off the appliance?
A minimum of 1 foot
120
B-vent chimney sections stacked vertically should be secured to the wall how often?
Every 6-feet.
121
When vent connectors of several gas-fired appliances go into a common vent, the vent connector from each individual appliance should be arranged to have as much _______ as possible before starting the lateral run to the common vent?
Vertical rise
122
To prevent accidental damage to the system, as well as burns, any portion of the vent which passes through an occupied area must be what?
enclosed
123
Type B-Vent is intended for use with this type of draft applications?
Neutral or negative
124
In a gas vent these are note permitted?
Dampers / restriction
125
These must be provided where the vent passes through both the floor and the ceiling?
Firestops
126
The appliances to be vented should be placed as close as possible to what point?
Where the vent is to run vertically up through the building.
127
What class fires involves combustible metals, such as sodium, potassium, titanium and magnesium?
Class D
128
Is it generally safe to burn pallets in a fireplace?
Yes
129
Flues and connectors should not be this type of metal?
Galvanized.
130
Masonry chimneys shall not be corbeled from a wall or foundation more than _______ of the chimney wall thickness.
One-half
131
What is Type B vent'S clearance above the ground, veranda, porch, deck, or balcony?
12 inches minimum
132
Type L flue gasses should not exceed what temperature?
570º F.
133
What is Type B vent's clearance to a window (operable or fixed closed) or door?
12 inches minimum
134
Which connectors can not pass through attic, unheated spaces, partitions, or in concealed areas?
Single-wall
135
What is Type B vent's minimum clearance to a ventilated soffit locate?
18 inches
136
What is Type B vent's minimum clearance to a mechanical air supply inlet?
6 feet
137
What is Type B vent's minimum clearance to an unventilated soffit?
12 inches
138
A solid-fuel-burning fireplace, stove, or heating system ______ connect to a chimney venting another fireplace, stove, or heating system.
Must not
139
The chimney could lean where it projects above the roof due to deteriorated mortar joints caused by this type of swaying?
Wind-induced swaying
