OG 5.23 Attachment #2 Coordinated Vertical Ventilation

Question 1

Vertical ventilation is an effective plan for fires in what three types of situations?

Answer 1

1. Single-story buildings
2. Top floor fires in multi-storied buildings
3. Attic fires

Question 2

An inspection hole is a diagnostic cut used to determine what three things about rafters?

Answer 2

Type
Direction
Spacing
***Also helps with determining sheathing type and thickness of roof covering

Question 3

What is the small triangular hole cut through the roof decking?

Answer 3

Smoke indicator hole

Question 4

A hole place directly over the fire is known as what?

Answer 4

Heat hole

Question 5

When using a roof scuttle to ventilate what must be evaluated first?

Answer 5

Check to see that they access the space you intend to ventilate.

Question 6

Skylights are normally placed over what two places on residential apartment building?

Answer 6

Hallways and stairwells

Question 7

Skylights are normally placed over what areas of commercial buildings?

Answer 7

Manufacturing areas

Question 8

When making a trench cut which direction should the long sides of the ventilation hole be?

Answer 8

Parallel with the rafters

Question 9

A heat hole will reduce the horizontal spread of fire as well as the potential for what two conditions?

Answer 9

Flashover

Backdraft

Question 10

When conducting vertical ventilation operations, firefighters must employ the practice of “trading ______ ___ ____.”

Answer 10

Space for time

Question 11

On a commercial structure, A good starting point for a ventilation hole size is __’ x __’

Answer 11

4’ x 8’

Question 12

Spacing for indicator holes shall be placed between the heat hole and the trench cut hole every few _______.

Answer 12

Every few yards

Question 13

A sufficient trench width can be __” to __”.

Answer 13

24” to 48”. This can be widened if fire conditions dictate.

Question 14

Personnel should never operate on the “____ ____” of the trench.

Answer 14

Fire side

Question 15

The Ideal location for a trench cut would be on the fireside of a ______ ____.

Answer 15

Structural wall

Question 16

When operating on a roof, crews should approach from the _________ side.

Answer 16

Windward side. Visibility and safety are greatly improved when crews can operate outside of smoke.

Question 17

When the structure has a flat roof, ladders should be placed where?

Answer 17

At the corners

Question 18

The roof team has the best view of what three things that firefighters on the ground may not see.

Answer 18

1. Perimeter of the building
2. Civilians in windows
3. Shape or layout of the building

Question 19

On peaked roofs, where is the best place to place ladders?

Answer 19

In close proximity to the desired ventilation hole.

Question 20

What should be considered a high priority if there is a roof crew on the roof and the second truck arrives?

Answer 20

second means of egress off the roof.

Question 21

What two types of roofs will require a full roof crew, if not more crews?

Answer 21

Flat roofs

Arched roofs

Question 22

Determine the need for vertical ventilation before cutting by doing what two things?

Answer 22

1. reading the fire and smoke conditions

2. listening for radio reports from interior crews