Chapter 19 Flashcards
What is the NFPA standard for ladder belts and tether?
NFPA1983
Personnel must be safely anchored to a structural feature of the ladder or platform when?
Any time they are not actively climbing or descending the ladder, any time they are not entering or exiting the platform, and any time the device is in motion
The primary control position for the aerial operator is?
At the lower controls usually located at the turntable
Where is the secondary control position located?
Either at the upper tip controls or controls in the platform basket
What is the job of the primary control operator?
Observe the aerial operation and prepare to override the secondary control operator if unsafe conditions are encountered
The load chart is?
Graphical or tabular description of the load that can be distributed on an aerial device based on factors such as extension, elevation, stabilizer set-up, wind, water flow, and ice load
Why should electrical load monitoring or envelope control system not be relied upon as the only means to determine safe operating practices?
These systems can fail or provide inacurrate information
The driver/operator should only do one motion at a time as recommended unless?
The situation is critical and the operator is qualified to operate the apparatus in that manner, or the apparatus is equipped with a system that is designed for multi-use operations
On some apparatus, simultaneous motion when one function is suddenly released while another is still in use can cause?
A hydraulic pressure spike that may cause erractic behavior of the aerial device. To avoid this problem, use single motion steps or slowly release the second function
What is feathering?
Slow and controlled movements, because of the forces being generated,especially as length increases all movements must be slow
Regardless of the skill of the operator, full-speed operations should minimized due to?
The large amount of dynamic stress placed upon the aerial device when the motion is halted
What are the two types of articulating aerial devices?
Water towers and aerial platforms
What are the sections on an articulating aerial device called?
Booms, these devices have two or more sections
Drivers of articulating aerial devices must also be concerned about what when moving the aerial?
The elbow joint between the two boom sections(knuckle) as well as the working end of the device
Firefighting mode is where the master stream is?rescue mode is?
At the tip of the aerial, rescue is one aerial section lower
As new apparatus are being designed what is being used less frequently?
Detachable ladder pipes, and appliances
The 75-80-80 guideline refers to?
75 degree elevation, 80 percent extended length, and 80 psi
Operators should do what on windy days to take advantage of it?
Train and learn the reach of the fire streams vs wind
Cold weather causes what in hydraulic fluid?
Causes an increased viscosity of the hydraulic oil, slowing overall machine operation
What is the limit of ice build-up allowed by nfpa 1901?
1/4 inch on all surfaces
What is effective in preventing immediate adhesion to the aerial device when ice formation begins?
Grease applied to exposed sliding surfaces such as slip tubes
What is “shrugging off” ice?
Extending and retracting the aerial device. If ice becomes so thick it cannot be shrugged off another method of driving will have to be used
What are common methods of removing ice?
High pressure steam, or a liquid thawing agent similar to the type used on aircraft
If the aerial device is going to be used for elevated master stream operations avoid parking it where?
Avoid parking it where the stream will be operated against the wind
