Vertical vent

Question 1

WHEN TO PERFORM VERTICAL VENTILATION

Answer 1

1. Single story residential structures with backdraft conditions
2. Lower floor of a residential structure with backdraft conditions
3. Attics including knee wall spaces
4. Top floor of a multi-story buildings
5. Large single-story commercial buildings

Question 2

When fire is in both the knee wall space and the attic space, the __ space should be
vented first, followed by the venting of the __ space lower on the roof.

Answer 2

attic, knee wall

Question 3

Balloon frame. Truck crews should be in place on the roof and be prepared to perform coordinatedvertical ventilation in the event that extension to the attic or top floor occurs. The roof___ be opened until it has been visually confirmed that fire has extended to the
attic or the top floor living spaces of the structure.

Answer 3

should not

Question 4

When fighting fires in balloon frame structures, It is especially important to have ___ready before holes are opened in the walls, ceilings, or roof.

Answer 4

hoselines

Question 5

For the purpose of ventilation operations, roof construction types are placed in two broad
categories: ___

Answer 5

lightweight and conventional

Question 6

Conventional: As a general rule, a conventionally constructed roof structure will sustain fire involvement for ___ before failure of the roof should be expected.

Answer 6

20 minutes

Question 7

With conventional construction, roof rafters are made from solid pieces of dimensional
lumber typically spaced___ inches apart.

Answer 7

twelve to sixteen

Question 8

When conducting ventilation operations on conventionally constructed roofs, the heat hole
should be cut ____ when conditions permit.

Answer 8

directly over the fire

Question 9

The sheathing used on conventionally framed roofs often consists of __ tongue and
groove board’s nailed perpendicular to the rafters.

Answer 9

1” x 6”

Question 10

The method that is utilized is dependent on the direction of the rafter and will be described as ___

Answer 10

working with and working against the construction

Question 11

Begin an inspection hole by plunging the tip of the saw into the roof
material at the furthest point from the egress ladder. Make a cut that is at a ___ to the ridge line or the edge of the roof. Continue the cut with until a rafter is felt, roll over the rafter, mark the location, and then continue the cut until a cut of about ___

Answer 11

45-degree angle,18 inches is made

Question 12

A standard cutting sequence for constructing a heat hole when working against
construction is:____

Answer 12

Head – Far – Bottom – Near

Question 13

A ventilation opening on a flat roof should always begin with an___

Answer 13

inspection hole

Question 14

The coffin cut uses a sequence of cuts that forms the shape of
the numbers ___

Answer 14

7, 9 and 8

Question 15

The coffin cut will create a heat hole that is up to ___
feet in size and can be easily expanded.

Answer 15

4 feet by 8

Question 16

There are two instances when it may be desirable to use this cutting procedure. The first
is on a conventionally framed flat roof with ____ sheathing and roof rafters that
are spaced ____.

Answer 16

1 inch x 6 inch, 12 to 24 inches on center

Question 17

A coffin cut should not be attempted on a roof with___ because the
panels of roofing material will be very difficult to remove from the rafters without further
dicing

Answer 17

plywood sheathing

Question 18

The only time a heat hole is not placed before a trench cut is if the fire has ___.

Answer 18

significantly self-vented

Question 19

Trench cuts can be used to cut off a rapidly extending cockloft fire at a pinch point. The
pinch point or “____” could be defined as an area where a building narrows sufficiently
to perform a successful operation before the fire can extend past that point.

Answer 19

throat

Question 20

A trench cut must be placed across the width of a flat roof to be effective, leaving only a
___ area of uncut roofing at each exterior wall for an egress path if necessary

Answer 20

four-foot

Question 21

For a gable roof, the trench should extend about __ of the distance to the eves on
both sides of the ridge.

Answer 21

two-thirds

Question 22

Trench cutting is a time-consuming process that must be considered and ___ to
be successful.

Answer 22

started early

Question 23

Most bulkhead doors are outward swinging, lightly to moderately secured, and can be
forced by a single member. The basic procedure is “___”.

Answer 23

Gap-Set-Force

Question 24

While forcing a scuttle is usually quick and easy some may require cutting. It is faster
and easier to ___ then to cut the roof around it. This is also
significantly less damaging during minor fires

Answer 24

cut the top of the scuttle out

Question 25

Opening skylights is a rapid and effective way to provide ___

Answer 25

natural ventilation

Question 26

Glass skylights Break a single pane of glass and wait for ___

Answer 26

ten seconds

Question 27

Most glass skylights use___

Answer 27

wired glass

Question 28

Skylights are common on ordinary apartment buildings because these structures
frequently predated modern lighting methods. As interior lighting of the hallways and
stairs improved, many skylights were covered over to improve security and energy
efficiency. These covered skylights are normally ____ or larger raised
areas on the roof that are in-line with the central hallway or a stairwell.

Answer 28

four feet by eight feet