Ladders Flashcards
NFPA requirement pertaining to marking portable ladders is that if marked they shall only be marked at the top how many inches??
18 inches
NFPA 1901 recommends the standards for fire department apparatus and states that the minimum total ladder length to be carried on aerial apparatus is how many feet?
115
How often should ladders be tested?
Annually
The heat sensors on the ladders which are below the second rungat the halfway point of the ladder they change color if the temperature on the ladder reaches how many degrees Fahrenheit?
300
If the ladder reaches 300° f it can lose as much as ____________ percent of its load capacity and can continue to accumulate over its lifetime?
25%
Based upon these factors the priority order for placement of portable ladders on the fireground should be?
Fire floor
Floor above the fire
Adjacent compartments and roof if needed
How many feet is a typical run of residential stairs?
13 feet
If placing a ladder above the roof line how many rungs should be above?
3-5 Rungs
Aerial operators must use the following aerial movements whenever a victim is present?
Raise, Rotate, Extend, Lower
What are the three main uses for elevated stream operations?
Extinguishment
Exposure protection
Flying standpipe
The maximum benefit of any stream and sad is structure the stream should be directed upward at a ________degree angle through a window or opening???
30 degree angle
The aerial ladder can be aimed upward with the addition of 21/2 inch, ______ degree elbow?
45
What is the nozzle reaction formula for smooth bore nozzles?
1.57 x D² x NP
What is the formula for nozzle reaction for a fog nozzle?
.0505 x Q x √NP
Elevated master stream operations can prevent Auto exposure over how many vertical feet ___________depending on when conditions and placement of the truck company??
100
