Ch5 driving aerial apparatus Flashcards
the angle formed by level ground and a line form the point where the front tires touch the ground to the lowest projection at the front of the apparatus
angle of approach
The angle formed by level ground and a line from the poin where the rear tires touch the ground to the lowest projection at the rear of the apparatus
angle of departure
the angle formed by level gorund and a line from the point where the rear tires touch the ground to the bottom of the frame at the wheelbase midpoint
breakover angle
the driver should set it to idle at blank to blank rpm rather than idle rpm
900-1100
long idling peroids are wasteful and can result in the use of blank gallons of gas per hour
.5
How long should engine idling be for engine cooldown
3-5 minutes
Sum total of the driver/operator’s reaction distance and the vehicle’s braking distance
total stopping distance
Distance a vehicle travles while the driver is moving his foot from the accelerator to the brake pedal when evasive action is needed
reaction distance
Distance the vehicle travels from the time the brakes are applied to the moment the vehicle comes to a full and complete stop
braking distance
what braking system helps minimize the chances of a vehicle being put into a skid
ABS
What device was used to help drivers maintain control on slippery surfaces
Front brake limiting valve
After the adoption of blank by the US government few trucks were built with the front brake limiting switch
ferderal motor vehicle safety standard 121 of 1975
these frictionless braking systems are are connected to either the drive shaft or the rear axle of the vehicle
electromagnetic braking systems
blank helps improve traction on slippery roads by reducing drive wheel overspin
ATC
blank follows the law of inertia which states that objects in motion tend to remain in motion; objects at rest tend to remain at rest until acted upon by an outside force
weight transfer
what device allows for a difference in speed between the two rear axles, while providing pulling power from each axtle
Inter-xle defferntial lock
at speeds above blank mph an emergency vehicle may “outrun” the effective range of its audible warning device
50
increasing the speed of an apparatus by only blank mps can decrease the audible distance of the siren by blank feet ore more
20, 250
when more than one emergency vehicle is responding along the same route, units should travel at least blank to blank feet apart
300-500
blank are an inexpensive and effective warning device
headlight flashers
All fire apparatus training and testing should follow the requiirements in nfpa blank
1451 standard for a fire service vehicle operation training program
ultimately it is up to the ? to determine what exercieses are necessary to properly assess the abliities of driver/operators
AHJ
the blank exercise tests the driver’s ability to move the vehicle backward within a restricted area
alley dock
This exercise simulates maneuvering around parked and stopped vehicles and tight corners
serpentine course
This exercise tests the driver’s ablilty to turn the vehicle 180 degrees within a confined space
confined space turnaround
this exercise tests the driver’s ability to steer the apparatus in a straight line, to judge distances from wheel to object, and to stop at a finish line
diminishing clearance
the goal of this exercise is to train the driver to drive staight-in to a curb parking situation
straight in parking
the goal of this exercise is to train the driver to be aware of where all the wheels on the apparatus are on the ground and to position them exactly where intended
crossover backing
