Flashcards in Chapter 18 - Stabilizing the Apparatus Deck (70)
Even if the device is only raised a few feet from the cradle to open a tilt cab, place the ___________ in position to minimize or eliminate stress on the ____________.
stabilizers / suspension
By deploying the apparatus stabilizers, the base of stability for the aerial apparatus is effectively ___________.
Rotating the device 360 degrees will trace a ________ ________.
As long as this ________ ________ does not extend outside the base of stability, the apparatus should remain stable.
- Theoretical safety zone that surrounds the center of gravity on an aerial apparatus.
Newer apparatus may be equipped with ________ switches that prevent the movement of the aerial device to the short jacked side.
limit (rotational interlocks)
If the apparatus is parked on a ________ grade, the center of gravity (and theoretical gravity circle) will be shifted to the _______ side.
lateral grade / lower
If the aerial device is raised over the lower side, the Gravity circle may extend beyond the base of ____________.
______________ the aerial device can also have an adverse effect on the stability of the apparatus, even on a level surface with stabilizers fully deployed.
Excessive _________ on the aerial device will result in an expansion of the gravity circle.
Some of the more common stabilizers are:
* _______-______ stabilizers (also called downriggers) - Straight jacks that extend down from the chassis.
* ______ ______________ (also called H stabilizers) - Stabilizers that extend straight away from the truck and have jacks that extend straight down to the ground.
* ___-______, scissor, or ____-style stabilizers (also called fulcrum-type stabilizers) - Stabilizers that extend down and away from the chassis at an angle.
* Box stabilizers
* A-frame, scissor, or X-style
To deploy the stabilizers and the aerial device, it will be necessary to engage the aerial ___________ system. In order to accomplish this, the D/O will have to activate the ________ ______-______ or other specialized hydraulic system.
hydraulic system / power take-off
The ______ system provides the power to the hydraulic pump, which in turn creates a pressure on the ________ in the hydraulic system.
PTO / fluid
The D/O should not engage the PTO until the aerial apparatus has been properly _____________ in accordance with the conditions on the scene.
The engagement switch for the PTO or hydraulic system is usually located on the ____________ of the vehicle, between the __________ and __________/________ seats or in the ________ panel above the driver's seat.
Dashboard / driver and passengers/officers / switch panel
The type of PTO activation switch varies from manufacturer to manufacturer and be __________, __________, __________, or a combination of these three.
pneumatic, electric, hydraulic
Pneumatic PTO systems require anywhere from _____ to _____ psi air pressure for the PTO to be operated depending on the manufacturer.
50 to 140
Most new models of aerial apparatus are equipped with what is called a "_____-______" PTO system. It is acceptable to engage these systems when the main transmission is in ___________.
"hot-shift" / neutral
Attempting to engage a PTO from neutral in a vehicle not equipped with a hot shift system could result in serious damage to the ______ and ______ _____________.
PTO / main transmission
Whenever possible, position the aerial device before activating the _______.
When the fire pump is already activated and in use, and the hydraulic systems needs to be activated later, it is necessary to lower ________ speed to near idle prior to engaging the hydraulic system PTO or other device. This action will lower _______ supply to nozzles. The operator must notify personnel on __________ and other nozzles of what is taking place.
engine / water / handlines
The process of setting up the stabilizers should begin with both the driver and officer assessing the _______ area.
The goal of stabilizer deployment is to ensure one move and one setup without having to ____________.
Conducting preliminary checks:
* If not automatically accomplished, activate the ______ ______ lock to minimize longitudinal movement of the chassis.
* Make sure the PTO engagement _______ is ____ before leaving the cab.
* ________ the wheels.
* front brake
* light is lit
The wheels should have chocks placed both ___ _______ ___ and ________ the tire, on both sides of the apparatus, with approximately an _____ of extra space for the apparatus to move without causing a wheel chock to become stuck under a tire.
in front of / behind / inch
After any lifting of the apparatus has been preformed, the chocks should be _____________ to ensure that this space is still maintained before lowering the apparatus. If this space is not maintained, it will be necessary to _______ the apparatus to remove the chock blocks.
repositioned / relift
If there is any doubt as to whether or not there is room for the stabilizers to deploy, a short ______ ______, _______ hook, or ______ span can be used to estimate the travel path of the stabilizers.
like pole / closet hook / arm span
Whenever possible a ________ should assist the D/O with positioning the apparatus because a ________ can help avoid curbs, manholes, vehicles, and so forth.
spotter / spotter
When the stabilizers are in place, the D/O should check the __________ upon which they are resting to be certain the ground is _________ enough to continue operations.
surface / stable