Tac Vent

Question 1

What is the definition of tac vent

Answer 1

The planned systematic and coordinated rwmoval of hot smoke and fire gases and their replacement with fresh air

Question 2

Definition of ventilation

Answer 2

The removal of products of combustion from a structure and their replacemeng with a supply of fresher air in order to improve conditions

Question 3

Consequential ventilation

Answer 3

Ventilation of the fire as a result of firefighting operations

Question 4

Tactical ventilation

Answer 4

Systematic and coordinated removal of hot smoke and fire gases and their replacement with hot air as part of the ICs overall incident plan

Question 5

Tactical ventilation can:

Answer 5

Limit or reduce fire spread and products of combustion
Improve conditions
Dilute and remove products of combustion
Assist with evacuation
Improve working conditions and survivability elsewhere

Question 6

Defensive ventilation

Answer 6

Carried out away from the fire or after extinguished to remove heat and smoke, particularly to improve access and escape routes in areas not affected by fire

Question 7

Offensive ventilation

Answer 7

Carried out close to the fire compartment to have a direct effect on the fire itself, to limit fire spread and to make conditions safer for firefighters

Question 8

Natural ventilation. .

Answer 8

Describes collectively the techniwues of ventilation not assisted by mechanical means. Includes the use of installed vents windows and doors

Question 9

Sequential ventilation

Answer 9

When multiple floors or rooms are reauired to be ventilated. The process of sequentially isolating and opening doors and windows so that the area can be cleared of products of combustion

Question 10

Negative pressure ventilation

Answer 10

Describes The process where ventilation of a compartment is achieved by reducing the pressure within it using fans or a branch set to a cone pattern and directed out of an opening

Question 11

Positive pressure ventilation

Answer 11

Describes the process whereby fans are used to ventilate a compartment or structure by forcing air into a building. This has the effect of increasing the pressure inside the structure which drives heat and products of combustion through an outlet to open air

Question 12

Ventilation pathways

Answer 12

Identification and use of available routes within a building where fresh air can enter a compartment and the products of combustion can travel to a planned outlet to open air

Question 13

HVAC

Answer 13

Heating Ventilation and air conditioning

Question 14

When can premises fixed installations be activated

Answer 14

Only on instructions from the IC and following advice from a suitably trained site personnel or SFSO

Question 15

Key elements of ventilation pathway

Answer 15

The inlet
The outlet
An enclosed route from the inlet to the fire to funnel and use incoming air to its best effect
An enclosed route from the fire to the outlet to avoid uncontrolled spread of products or combustion in to ajoining compartments
Charged covering jets should be sited at both inlet and outlet
Consider all available information for planning
A 360

Question 16

3 levels of ppv

Answer 16

Stage 1. Defensive. Post fire. Ppv fans force freah air through building.
Stage 2. Offensive. Fire under control but still burning. Crew approaches fire but makes outlet vent and applies ppv fans.
Stage 3. Offiensive. Implementing ppv before committing crews