Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
32 Cards in this Set
- Front
- Back
|
When should appliance checks be conducted by the driver? |
• at commencement of shift • when changing over an appliance • after a working incident |
|
|
Equipment checks should be recorded on what form? |
M32 |
|
|
Name the steps involved in correct pump engagement. |
1. Bring the appliance to a complete stop 2. Apply handbrake 3. Transmission to neutral 4. Engage HP pump 5. Engage main pump 6. Count to 5 then put transmission into top gear |
|
|
Name the steps for correct pump disengagement. |
1. Transmission to neutral 2. Count to 5 then disengage main pump 3. Disengage HP pump |
|
|
Describe the function of the transfer case. |
Transfer case directs power from the engine. Once the pump is engaged it transfers the engine power from the drive wheels to the pump. |
|
|
What does the pump panel consist of? |
• water inlets • water deliveries • throttle • gauges • foam system • relief valve |
|
|
Describe function of the compound gauge. |
• Displays water pressure entering the pump
• capable of measuring positive and negative pressures |
|
|
Describe function of the main pressure gauge. |
Displays water pressure leaving the pump but before it reaches individual discharge line gauges. |
|
|
Describe the function of the high pressure gauge. |
Displays the pressure delivered to the high pressure hose reels. |
|
|
Describe near side/off side |
Near side = left side of truck (kerb side)
Off side = right side of truck (drivers side) |
|
|
Name the components of a centrifugal pump. |
1. Impeller 2. Volute |
|
|
Name the components and functions of the impeller. |
1. Eye; liquid is drawn inward 2. Vanes; throw the water outwards |
|
|
Describe the function of the relief valve |
The relief valve is a safety mechanism designed to protect branch operators against surges in pressure when using 64mm hose. |
|
|
What are the causes of pressure surges? |
1. Pressurised supply; higher pressure than initial supply e.g introduction of supply from mains 2. Fluctuation through mains supply 3. Delivery being shut off; multiple lines in use and shutting one off |
|
|
What are the causes of pump damage? |
1. Cavitation 2. Over-heating 3. Water hammer 4. Relief valve on when not required 5. Appliance running out of water |
|
|
What are the advantages of using water as a primary fire fighting agent? |
1. Relatively cheap 2. Relatively available and plentiful 3. Readily absorbs quantities of heat particularly in fog pattern 4. Expands when converted to steam; 1700:1 at 100c 5. Easily transported |
|
|
What are the disadvantages of using water a primary fire fighting agent? |
1. High surface tension; limits soaking/penetrating ability 2. Reactivity with certain materials and chemicals 3. Low viscosity (resistance to flow) 4. Conducts electricity |
|
|
Name the 5 principles of friction loss |
Friction loss; 1. Increases the longer the length of the hose 2. Decreases directly with the increase in diameter of the hose 3. Increases directly as the square of the velocity (m/s) 4. Increases with the roughness of the interior of the hose 5. For all practical purposes is independent of pressure |
|
|
What are some ways to reduce friction |
• eliminate sharp bends • use adapters only when necessary • keep branches and valves fully open when possible • using gaskets of the proper size • using short lines as much as possible • use larger hoses or multiple lines when flow must be increased |
|
|
For a 30M length of 64mm hose, how much pressure should be added at the pump? |
100 KPA |
|
|
How many KPA is lost or gained per metre of elevation? |
10 KPA |
|
|
What are the 3 factors to consider when calculating pump output pressure? |
1. Elevation 2. Branch requirements 3. Friction |
|
|
Name the 3 factors affecting jet reaction at the branch? |
1. Changes in pressure 2. Size of TFT 3. Spray pattern |
|
|
Describe an open circuit relay |
In an OCR, water is delivered into a holding dam or the appliance tank of each appliance in the relay |
|
|
Describe a closed circuit relay |
In a CCR, the water is pumped from the source by the first relay pump to the inlet of the next relay pump. Each pump supplies the next through to the incident ground pump that delivers the water at the incident. |
|
|
What is the blood alcohol limit when driving a MFS appliance? |
0.00 |
|
|
What is GP pump equipment used for? |
- Firefighting - rescue - salvage - overhaul - special hazards - forced entry |
|
|
What are pumps used for? |
- to control the pressure of the water - control the volume of flow of the water - transfer water to and from an appliance |
|
|
What is considered the average height per floor of a building? |
3.5m |
|
|
What is considered the average height per floor of a building? |
3.5m |
|
|
When relay pumping, what factors need to be considered? |
- quantity of water required - distance to nearest water supply - the number and capacities of available pumps - the terrain over which the relay extends |
|
|
What emergencies do firefighters attend? |
MVA Structure and bush fires Hazardous substance spills Confined space work Rescues |
