Previous Questions Flashcards
At what pressure should the intermediate pumps start supplying water in an open circuit?
2 bar
What two types of extinguishers can be used on fires involving electrical apparatus
Dry powder
Co2
When would 6% low expansion foam be used
For fires involving polar solvents
When producing foam with an RB101, what pressure should the branch operate at, and what should be the flow setting
6 bar
400 litres per minute
In which sector would the bridgehead be located at a high rise incident
The lobby sector
Where should a fire lift be stopped at when ascending the building at a high rise incident and what should be done if there are doubts to the location of the fire
A minimum of 2 floors below the fire
Proceed to a known safe point and continue on foot
What does the red warning triangle displayed on the TIC indicate
General system failure.
Turn off and leave for 5 minutes.
If the symbol is still present, it should be taken off the run.
Staying low is one of the techniques to avoid unnecessary exposure to heat in a basement fire. List another four
Minimum weight of attack - charged 45mm jet
Pulse spray to cool gas
Get below the heat barrier before applying water
Warn other BA teams before applying water
6 hazards when firefighting in basements
Difficult to ventilate Heat barrier Difficult access and egress Confined working space Not many landmarks Building utilities and services Difficult to locate the seat of the fire
How would self ventilation occur at a fire
Fire damages the structure of the premises, so that increased ventilation occurs.
Examples are fire breaking a window, roof collapse, partial wall collapse
What is offensive ventilation
Carried out in the fire compartment, to limit fire spread and improve conditions
What is a flashover
The sudden and sustained transition from a fire in a room to a room on fire.
What are the advantages of using a rising main
Reduces the amount of hose Reduces friction loss Less equipment needed Stairs clear of hose Reduces effort and time required by staff
What are the three functions of an AFA
To detect a fire
Raise an alarm and indicate it’s whereabouts
Raise alarm at central control point
What are the firefighter actions when signs of a backdraught are present
Communicate the hazard to other FFs, ECO and IC
Consider ventilating
Use the TIC to assess temperatures In the compartment
Use correct door procedure
Pulse spray
