The company officer water delivery test.
We all know that firefighting is a teamwork operation and that the team has a boss. The boss is the company officer. It is the company officer that sets up and or implements the plan for the work his crew is going to do. If the crew is going to be involved with direct fire attack they will have to be armed with the appropriate water delivery weapon to get the job done safely and efficient. Well, it makes sense that the person in charge should know everything about the weapons that are going to be used. Let’s break this down a little further. Not only do you need to know your weapons, you need to know what ammunition is available and how to load the weapon with the ammunition. Let’s change these three things to firefighting terms. The weapon is the water delivery appliance that is going to be used to direct the fire stream. This appliance can either be a handline nozzle, a specialty type nozzle, such as a piercing nozzle, or a master stream. The ammunition is the water and the fire killing capabilities of the ammunition is rated by gallons per minute (GPM). As far as loading the weapons with the ammunition, this relates to the pump operation/hose evolution that is used to get the water to the water delivery appliance.
The following information is designed to be a pretest for company officers to test their knowledge on using the weapons they have available to them to combat fire. Although this is a generic test, the answers to these questions should be based on how your Department operates, including the type of equipment that is available.
COMPANY OFFICER FIRE GROUND WATER FLOW
Questions one through seven do not require a discussion. Simply questions test your knowledge of your actual inventory apparatus.
1. What are the pump capacities of the units on your department?
2. What is the size of the supply hose on your department, and how much is on each unit?
3. What is the size and amount of attack lines on your units?
4. What type of handline nozzles do you have on your attack lines?
5. What type of master streams does your department have?
6. What type of master streams nozzles does your department have? (smooth bore, combination nozzles, fixed or automatic)
7. What size booster tanks does your department have?
8. What is the maximum flow capability of the pumps on your department?
This question actually relates to a maximum flow operations, mainly master streams and relay pump operations. It’s important to know that he pumps rated capacity is based on net engine pressure. Net engine pressure is the discharge pressure created solely from the motor of the apparatus. There is no pressurized incoming pressure to assist the pumps capabilities. Net engine pressure involves booster tank operations and drafting operations where the water is being supplied to the pump from a static water source, again not a pressurized water source.
When the pump is connected to a pressurized water source, such as a fire hydrant, or at the receiving end of a relay pump operation, the incoming pressure actually assists the motor in the apparatus that is creating the net engine pressure, therefore lowering the work needed to create the net pressure. To explain this in real terms
9. How many large supply lines can one of your units receive?
10. Can your department’s pumps share one supply line between two or more units?
11. If so, how?
12. What is relay pumping?
13. When should relay pumping be used?
14. How do you determine how many pumps should be involved with a relay?
15. What type of water management system does your department have for large fire operations?
16. Can you explain how your nozzles operate?
17. What is the flow capabilities of these nozzles?
18. What type of flows are produced on your interior attack lines?
19. What type of flows are produced on your large flow handlines (1-1/2”, 1-3/4”, 2”, 2-1/2” and 3”)?
20. What type of flows can be produced from your master streams?
21. What is the maximum flow that is able to be produced from your booster tank operation?
21. Does a single large diameter hose supply line get all the available water from the hydrant to the pump?
22. What is a blitz attack?
23. What type of system, if any, do you use to determine the flow (GPM) needed to extinguish a fire in a building?
24. How quickly should a knockdown be made on a structure fire?