18 - IFSTA Chapter 18 Flashcards
Another name for Stabilizers besides outriggers and ground jacks.
Screw jacks
Stabilizers: Straight jacks that extend down from the chassis are called.
Post-type stabilizers also called downriggers
Stabilizers that extend straight away from the truck and have jacks that extend straight down to the ground are called.
Box stabilizers also called H-stabilizers.
Stabilizers that extend down and away from the chassis at an angle are called.
A-frame, scissor, or X-style stabilizers also called fulcrum-type stabilizers.
The PTO system provides the power to?
The hydraulic pump
The driver/operator should only engage the PTO after the aerial apparatus has been
Properly positioned
Some apparatus manufacturers recommend that apparatus equipped with engine brakes or retarders may need to have that system shut off prior to doing what?
Engaging the PTO
The wheels should have chocks placed both in front of and behind the tire on
Both sides of the apparatus
What can also be used to supplement stabilizer effectiveness?
Cribbing
A slope of 5 percent means that there is a rise in terrain height of
5 ft for every run of 100 ft of distance
On a grade do not position the aparatus
Crosswise
Apparatus parked on a longitudinal grade outside of the manufacturer’s recommended operating range, should not extend or retract the aerial device over the side of the apparatus. On apparatus made before what year?
1991
Interlock prevents
the flow of hydraulic fluid into or out of the stabilization system while the aerial device is in use.
When the pressure releases from the stabilization system, the apparatus often
drops very quickly.
Some older pieces of apparatus still in service may be equipped with
Manual stabilizers
If a manual stabilizer lifts off the pad during aerial operations,
do not adjust it
Tractor Drawn: The driver/operator should never position the vehicle with the tractor and trailer at an angle greater than how many degrees?
90
IFSTA recommend what during every stabilizer setup and every time the aerial device is raised from its bed?
fully deploying stabilizers and stabilizer pads
Excessive loading on the aerial device will result in an expansion of?
The gravity circle
To deploy the stabilizers and the aerial device
it will be necessary to engage the aerial hydraulic system
What is the most critical aspect of preparing an aerial device for use?
Apparatus stabilization
Where is the apparatus’s center of gravity located when parked with the aerial device in the stowed position?
Along the longitudinal midline of the chassis between the front and rear axles
What takes the weight when the aerial device is elevated from the resting position on the cradle?
Suspension
What is increased when stabilizers are deployed?
Base of stability
What happens to the center of gravity when extending the aerial device straight over the front of the apparatus?
Center of gravity shifts forward
What happens to the center of gravity when rotating the extended aerial device?
The center of gravity moves away from the longitudinal midline of the apparatus towards the side of aerial operation
What is the theoretical safety zone that surrounds the center of gravity on an aerial apparatus?
Gravity circle
What could happen if the gravity circle is extended beyond the base of stability on the short jacked side?
Overturn the apparatus
Which of these is not another name for stabilizers?
Base supports
Which of these is not a common style of stabilizers?
Beam-type
What does PTO stand for?
Power take-off
What is the main function of the PTO?
It provides power to the hydraulic pump
Which of these is not a common type of PTO?
Hydro
What type of PTO system are most newer apparatus equiped with?
Hot-shift
What is the advantage of a hot-shift PTO system?
It allows you to engage these systems when the main transmission is in neutral
Which of these is not a preliminary check before deploying stabilizers?
Position of stabilizers
How much space should be between the tire and the wheel chock?
Approximately 1”
Which of these is not something the apparatus operator should be observant of when deploying the stabilizers?
Solid concrete
What is the term for setting the stabilizers on one side of an apparatus shorter than the other side?
Short-jacking
Correction of lateral unevenness is possible on grades of what percent?
5%
Anytime the aerial ladder is going to be raised from the bed what does IFSTA recommend
Fully deploying stabilizers and jack plates
A gravity circle in relation to aerial apparatus is defined as
Theoretical safety zone surrounding the center of gravity
When parking on a lateral grade, the gravity circle will move to
lower side
Overloading the aerial will do what to the gravity circle
expand
what will most likely result if the aerial is extended on the short-jacked side
the aerial will overturn
Stabilizers that extend down and away at an angle are what type
A-frame, X style, scissor, fulcrum
The PTO (power take off) is required to
engage aerial hydraulic system
A pneumatic PTO activation may not engage if
air pressure is too low
During an emergency it is important to have timely and efficient deployment of what as an aerial operator
stabilizers
When placing wheel chocks prior to aerial operation, one should
leave approximately one inch between chock and tire
An item carried on the aerial apparatus used to distribute weight when using stabilizers is called
stabilizer pad
What should be considered a last resort to assist in stabilizer effectiveness
cribbing
What can affect the engine speed during aerial operations
stablilization controls
To reduce chassis torque damage, what should be avoided when deploying stabilizers
fully activating one at a time
When depolying stabilizers, it is good practice to
alternate deploying each side to remain close to level throughout
What is a danger of flowing water from an aerial, if aerial is extended opposite of short-jacked side
nozzle reaction transfers weight to the opposite side of aerial
Stabilizers can often correct for lateral unevennes of grades up to
5%
If aerial turn-table is not level what is the result to the ladder
rungs will not be parallel to ground
On a longitudinal grade best practice is to operate the aerial in what postion
directly over the front or rear
Which of the following is correct regarding stabilizing on ice
melting ice under stabilizer pad can produce air spaces
Which of the following provides power to the hydraulic pump, which in turn creates a pressure on the fluid in the hydraulic system of the aerial apparatus?
PTO System
Which of the following types of stabilizers have straight jacks that extend down from the chassis?
Post-type stabilizers
What will excessive loading on the aerial device result in?
An expansion of the gravity circle
Which of the following best describes why the driver/operator should never position a tractor-drawn aerial apparatus with the tractor and trailer at an angle greater than 90 degrees?
Doing so may cause damage to the truck
If an apparatus is parked on a lateral grade, where will the center of gravity shift?
Lower side
Which of the following describes the effects the interlock has on the stabilization system while the aerial device is in use?
Prevents the flow of hydraulic fluid in or out of the stabilization system
Before retracting the stabilizers, what must the driver check around the entire apparatus for?
Make sure all personnel and equipment are clear of the apparatus
Which of the following is the best reason a spotter should assist the driver/operator with positioning the apparatus?
A spotter can help avoid obstructions such as curbs, manholes, and vehicles
Which of the following are the most common stabilizers used on newer apparatus?
Box stabilizers
How can you prevent setting the apparatus directly on top of the tire chocks when retracting the stabilizers?
By moving the wheel chocks slightly away from the tires before retracting the stabilizers
Which type of stabilizers are older midship and tractor-drawn aerials most likely to have?
Manual stabilizers
Which of the following is a characteristic of a manual stabilizer?
The extension arm must be swung into position manually
Which of the following is the reason the driver/operator should always raise the stabilizers in the reverse order by which they were deployed?
It avoids undue stress on any component of the apparatus
What happens when stabilizing a tractor-drawn aerial apparatus, and the tractor is at a 60-degree angle from the centerline of the trailer?
Achieves maximum stability
When stabilizing the apparatus on potentially unstable surfaces, what should the driver/operator ensure about the objects or ground surface upon which the stabilizers rest?
That it is solid and capable of supporting the necessary weight
What will operating stabilizer controls in an aerial apparatus automatically regulate?
Engine idle speed
When positioning a tractor-drawn aerial apparatus, what will happen when parking the apparatus with an angle between the tractor and trailer sections?
It will increase the stability beyond what the stabilizers alone can provide
When locking the stabilizers and transferring power to the aerial device, how does the driver/operator activate the holding valves?
By moving the selector switch to the aerial position
In order to activate the stabilizers, the driver/operator should make certain that the selector valve is in which position?
The stabilization position
Which of the followingcan affect stabilization of the apparatus by creating an air gap between the stabilizer pad and the ground?
Icy surfaces
What is the theoretical safety zone that surrounds the center of gravity on an aerial apparatus called?
Gravity circle
What happens to the center of gravity on an aerial apparatus as you move the ladder around the truck?
It moves with the ladder
There are three common types of stabilizers. What of the following is not one of them?
Manual Stabilizer
When you over load an aerial device , what happens to the gravity circle?
It expands
When short jacking an aerial device what is a concern with the gravity circle?
Your out riggers may be with in the circle
How should wheels chocks be placed?
Approximately 1” away from the tire
What can be done to prevent longitude movement of an aerial apparatus?
Front wheel brake is engaged
What is the name of the piece of metal on the bottom of the stabilizer that makes contact with the stabilizer pad?
Stabilizer shoe
A 2 piece aerial apparatus stabilizer device , consisting of an extension arm and lifting jack is called?
H- jack/ H stabilizer
Stabilizer pads provided by the manufacturer are normally what size?
24” x 24”
To prevent damage to the torque box you should never do what?
Activate one stabilizer alone
What should the driver do when the stabilizers touch the ground?
Alternate between sides when lifting
An example of a Fulcrum-Type Stabilizer is?
A- Frame
When is it ok to short jack an aerial apparatus?
When full stabilization is restricted
What should draw you caution when you are short jacked and operating the water way?
The transfer of weight to the short jacked side
What is the % of a grade that most ladder truck can correct to?
5%
A 5% grade is a rise of how many feet in what distance?
5’ in 100’
When deploying the outriggers on a hill, what is the proper deployment steps?
Up hill side 1st then level with down hill side
When positioning for aerial usageon a hill, what side do you want to work of off?
The up hill side
What is the angle for maximum stability with a tractor drawn aerial?
60°
What is not a common stabilizer configuration?
Square
Pneumatic systems require anywhere from what to what PSI air pressure for the PTO to be operated?
50 - 140 PSI
To prevent longitudinal movement ensure that what is activated?
Front brake lock
Before the actual deployment of the stabilizers, driver/operators should make sure all of the following are done except what?
Job functions are known by all of the crew
The wheels should have chocks placed both in front of and behind the tire, on both sides of the apparatus, with approximately how much of extra space for the apparatus to move?
1 inch
The flat metal plate attached to the bottom of the aerial apparatus stabilizer to provide firm footing is called all of the following except what?
Stabilizer plate
Driver operators should avoid placing stabilizers over all of the following except what?
Lightweight asphalt
What can be used to ensure there is room for the stabilizers to deploy?
Pike pole
What can be used to estimate the travel path of the stabilizers?
Arm span
What is commonly used on newer apparatus?
Box stabilizers
A fulcrum-type stabilizer extends at an angle down and away from the chassis of an aerial fire apparatus is called all of the following except what?
Box frame
Fulcrum stabilizers prior to the placement of the stabilizer pads should be placed where?
Within a few inches of the ground
In short-jacking situations waterway operations should be conducted how?
With caution
Correction of lateral unevenness is possible on grades of up to what?
5 degrees
Most manufacturers of aerial devices recommend what stabilizers be lowered first if on lateral unevenness?
Uphill side of vehicle
The aerial device should be operated how?
Over the high side of the apparatus
What type of stabilizer commonly has holes designed for the insertion of steel safety pins?
Box
Maximum stability in tractor-drawn aerial apparatus is achieved with what angle?
60 degrees
Many tractor-drawn vehicles are equipped with an alarm that sounds if an attempt is made to create an angle greater than what?
90 degrees
On longitudinal grades, operate the aerial device directly over what part of the apparatus to minimize stress on the device?
Over the front or rear
When parked, with the aerial device in its stowed position, where is the apparatus’ center of gravity generally located?
Along the longitudinal midline of the chassis, between the front and rear axles
What is defined as the theoretical safety zone that surrounds the center of gravity on an aerial apparatus?
Gravity circle
Which type of stabilizers extend straight away from the truck and have jacks that extend straight down to the ground?
Box
The type of PTO activation switch varies from manufacturer to manufacturer and may be pneumatic, electric, hydraulic, or a combination of these three. Pneumatic systems require how much air pressure for the PTO to be operated, depending on the manufacturer?
50 to 140 psi
When the fire pump is already activated and in use on an aerial device, and the hydraulic system needs to be activated, what measure must be performed, and is necessary, prior to engaging the hydraulic system PTO or other device?
Lower engine speed to near idle
If not automatically accomplished, what can be activated in order to minimize longitudinal movement of the chasis?
Front brake lock
Chose the best answer for placement of the wheel chocks when conducting preliminary checks, and before deployment of the stabilizers.
Both in front and behind the tire, on both sides
When referencing the procedures for engaging the PTO on an apparatus with an automatic transmission but without a fire pump, which step happens after the parking brake is set but before placing the transmission in the appropriate drive gear?
Switch off Jacobs Brake
When stabilizing a truck equipped with a four-jack system, in order to avoid potential chassis and torque box damage, how should the stabilizers be operated?.
In parallel
What is one of the primary differences driver/operators must consider when using fulcrum-type stabilizers instead of box-type stabilizers?
Can only deploy in fully-extended position
Which are the most common stabilizers used on newer apparatus?
Box
What size of the stabilizer pads are usually provided by the manufacturer?
24x24
Which kind of stabilizers extend at an angle down and away from the chasis?
Fulcrum
Which stabilizers should be lowered to within a few inches of the ground prior to the placement of the stabilizer pads?
A frame
Which valves are designed to prevent the movement of fluid within the stabilization system?
Holding
What should driver/operators do around the apparatus when retracting the stabilizers?
Personnel and equipment are clear
Where does the center of gravity shift when extending the aerial device straight?
Forward
What types of stabilizers do older midship and tractor drawn aerials have?
Manual
Where does the center of gravity shift when the aerial device is parked on a lateral grade?
Lower side
Where should the hydraulic power transfer from and to, in order for the driver to be ready to operate the aerial device?
From stabilizer to aerial
Extending the aerial device straight over the front of the apparatus will cause the center of gravity to shift?
forward
If an apparatus is parked on a lateral grade, the center of gravity will shift to the?
lower side
Excessive loading on the aerial device will result in?
an expansion of the gravity circle
Which of the following types of stabilizers have straight jacks that extend down from the chassis?
post type stabilizers
Which of the following provides power to the hydraulic pump, which in turn creates a pressure on the fluid in the hydraulic system of the aerial apparatus?
PTO system
When the Driver/Operator is sure the vehicle is equipped with a ‘‘hot shift’’ PTO system, it is acceptable to engage the system when?
the main transmission is in neutral
Which of the following is the BEST reason a spotter should assist the driver/operator with positioning the apparatus?
a spotter can help avoid obstructions such as curbs, manholes, and vehicles
In order to activate the stabilizers the driver/operator should make sure that the selector valve is in what position?
aerial
Operating stabilizer controls in an aerial apparatus will automatically regulate?
engine idle speed
Which of the following are the most common stabilizers used on newer apparatus?
box stabilizers
Which of the following is one of the two ways an aerial apparatus truck can be uneven?
laterally
Which of the following can affect stabilization of the apparatus by creating an air gap between the stabilizer pad and the ground?
icy surfaces
When retracting the stabilizers, setting the apparatus directly on top of the wheel chocks can be prevented by?
moving the wheel chocks slightly away from the tires before retracting the stabilizers
Before retracting the stabilizers, the driver/operator should check around the entire apparatus to?
make sure all personnel and equipment are clear of the apparatus
Which of the following types of stabilizers are older midship and tractor drawn aerials MOST likely to have?
manual stabilizers
Which of the following is a characteristics of manual stabilizers?
the extension arm must be swung into position manually
When positioning a tractor drawn aerial apparatus, parking the apparatus with an angle between the tractor and trailer sections?
increases the stability beyond what the stabilizers alone can provide
When stabilizing a tractor drawn aerial apparatus, positioning the tractor at a 60 degree angle from the centerline of the trailer?
achieves maximum stability
Which of the following BEST describes why the driver/operator should never position a tractor drawn aerial apparatus with the tractor and trailer at an angle greater than 90 degrees?
doing so may cause damage to the truck
Modern tillered aerial apparatus are equipment with stabilization systems capable of securely stabilizing them whether they’re jackknifed or not, techniques for jackknifing are more important to?
older models of tillered aerial apparatus
When parked and the aerial is stowed, where is the center of gravity on the apparatus?
Along the longitudinal midline of the chassis
What is recommended for each time deploying the stabilizers?
Deploy them fully and use the jack plates
What happens to the center of gravity if the driver begins to rotate the aerial device?
It moves away from the longitudinal midline towards the side of aerial operation
What is the safety zone that surrounds the center of gravity on an aerial apparatus?
Gravity Circle
What happens to the center of gravity if the apparatus is parked on a lateral grade?
It shifts to the lower side
What happens during overloading?
The gravity circle extends past the base of stability
What type of stabilizers extend down from the chassis?
Post-type
What should be done prior to stabilizing the aerial?
Assess the set up area and determine it is safe and appropriate for stabilization
Where should the wheel chocks be placed?
In the front and rear, about an inch from the tire
What provides a firm footing on the stabilizing surface that is attached to the bottom of the stabilizer?
Stabilizer shoe
What needs to be operated once the aerial is stabilized in order to move the aerial ladder?
Selector valve
What occurs if full deployment on one side then the other happens repetitively?
Damage to tires/wheels, axles, suspension, torque box, and chassis
When should the jack plates be placed while utilizing fulcrum-type stabilizers?
When the stabilizers are a few inches from the ground
Up to how much lateral unevenness can most apparatus fix?
5%
Where should the aerial be operated if working on a longitudinal grade?
Over the front or rear of the apparatus
What could form between the jack plate and ice as operations continue?
Air bubbles causing more instability
When should the stabilizers be put away?
Once the aerial is bedded all of the way
What should be used to prevent dropping or drift of the jacks?
Steel pins
When stabilizing a tractor-drawn aerial, which direction should the cab face?
Away from the building
What degrees provide the maximum stability for a tractor-drawn aerial?
60
What is one of the most critical aspects of preparing an aerial device for use?
stabilization
What prevents the movement of the aerial device to the short-jacked side?
rotational interlocks
Which stabilizers extend down and away from the chasis at an angle?
A-Frame
For pneumatic PTO activation, the systems require how many PSI of air pressure to operate?
50-140psi
The process of setting the stabilizers should begin with what?
Both the driver and officer assessing the setup area
If it is not automatic, what needs to be activated to minimize the longitudinal movement of the chasis?
front brake lock
What is attached to the bottom of the apparatus stabilizer to provide firm footing on the stabilizing surface?
stabilizer shoe
What is the ideal location to stabilize aerial apparatus?
level terrain
Which stabilizer type is a two-piece device consisting of an extension arm and a lifting jack?
Box stabilizer
What is the most common stabilizer found on newer apparatus?
Box stabilizer
What is usually provided by the manufacturer of the apparatus and are usually 24x24 inch?
stabilizer pad
Which is another name for an A-frame type stabilizer?
fulcrum type stabilizer
A slope of 5% means there is a rise in terrain height fo 5 feet for every run of how far?
100’
What is the term used when setting the stabilizers on one side shorter than the other?
short-jacking
What prevents the flow of hydraulic fluid into or out of the stabilization system while the aerial device is in use?
interlock
When operating on longitudinal grade, where should you operate an articulating aerial device?
off the rear
On longitudinal grades, what will minimize stress on the aerial device?
operating over the front or rear
When stabilizing a tiller, maximum stability is achieved when the angle of the tractor is what degress from centerline of the trailer?
60 degrees
With the tractor and trailer at the correct angle, where should the aerial be operated to maintain maximum stability?
toward the outside of the angle
When operating on a lateral grade, which side should the aerial be operated from?
uphill side
What air pressure must a pneumatic system require?
50 to 140 psi
What is the theoretical safety zone that surrounds the center of gravity on an aerial apparatus?
gravity circle
What is done to an aerial device to expand the gravity circle, potentially beyond the base of stability?
overloading
What placement is bad for a stabilizer to be set?
underground tanks
what the most common used stabilizers on newer apparatus?
box stabilizers
When short-jacking, what operation should be done with caution?
waterway operations
what grade is correction of lateral uneveness possible up to?
5%
on a lateral grade, what side should the ladder operate?
high side
which side of the stabilizers are lowered first on a lateral grade?
high side
When paritally extending stabilizers on one side is called?
short-jacking
What side do you operate an aerial apparatus on a longitudinal grade?
front or rear
what goes in the holes on box stabilizers?
steel safety pins
how does the apparatus move a stabilizers when pressure is released?
drops very quickly
What is the maximum angle for stability for a tiller to set up at?
60 degrees
what kind of stabilizers extend down from the chassis?
post-type stabilizers
what stabilizer extends straight out from the truck then the jacks extend straight down?
box stabilizers
What stabilizers extend down at an angle?
a-frame, scissors or x-style
what does PTO stand for?
power take off
what does PTO provide power to?
hydraulic pump
Where does the center of gravity shift if the ladder goes straight over the front?
forward
To deploy the stabilizers and aerial device the driver operator will have to activate the
PTO
Pneumatic systems require how much psi for the PTO to be operated?
50-140
Some apparatus manufacturers recommend that apparatus equipped with engine brakes or retarders may need to have that system shut off prior to engaging the
PTO
It is acceptable to engage these systems when the main transmission is in neutral
hot shift PTO system
If not automatically accomplished, activate what to minimize longitudinal movement of the chassis?
the front brake
Make sure that the what light is lit before leaving the cab?
PTO engagement light
The wheels should have chocks placed
both in front and behind the tire
The wheels should have chocks placed
on both sides of the apparatus
The wheels should have chocks placed
with approximately an inch of extra space
After any lifting of the apparatus has been performed
the chocks should be repositioned before lowering
over drainage areas, underground tanks or vaults, and utility access zones
avoid placing stabilizers
Once the driver/operator is assured that the preliminary activities are successfully completed and the ground is prepared for stabilization activities
the selector valve may be operated to provide hydraulic power to the stabilizing system
the most common stabilizers used on newer apparatus
box stabilizers
one stabilizer should never be fully activated
alone
The designs of some apparatus allow for partial extension of the stabilizer arms, sometimes called
short jacking
Waterway operations should be conducted with caution
in short-jacking situations
When stabilizing the apparatus on any type of grade or uneven surface, beware of possible
stabilizer slippage
Correction of lateral unevenness is possible on grades of up to
5%
On longitudial grades, operatue articulating aerial devices off
the rear
When pre-1991 (or non-K-braced) apparatus is parked on a longitudinal grade outside of the manufacturer’s recommended operating range, do not extend or retract the aerial device
over the side of
What is the theoretical safety zone that surrounds the center of gravity on an aerial apparatus called?
Gravity circle
What happens to the center of gravity on an aerial apparatus as you move the ladder around the truck?
It moves with the ladder
There are three common types of stabilizers. What of the following is not one of them?
Manual Stabilizer
When you over load an aerial device , what happens to the gravity circle?
It expands
When short jacking an aerial device what is a concern with the gravity circle?
Your out riggers may be with in the circle
How should wheels chocks be placed?
Approximately 1” away from the tire
What can be done to prevent longitude movement of an aerial apparatus?
Front wheel brake is engaged
What is the name of the piece of metal on the bottom of the stabilizer that makes contact with the stabilizer pad?
Stabilizer shoe
A 2 piece aerial apparatus stabilizer device , consisting of an extension arm and lifting jack is called?
H- jack/ H stabilizer
Stabilizer pads provided by the manufacturer are normally what size?
24” x 24”
To prevent damage to the torque box you should never do what?
Activate one stabilizer alone
What should the driver do when the stabilizers touch the ground?
Alternate between sides when lifting
An example of a Fulcrum-Type Stabilizer is?
A- Frame
When is it ok to short jack an aerial apparatus?
When full stabilization is restricted
What should draw you caution when you are short jacked and operating the water way?
The transfer of weight to the short jacked side
What is the % of a grade that most ladder truck can correct to?
5%
A 5% grade is a rise of how many feet in what distance?
5’ in 100’
When deploying the outriggers on a hill, what is the proper deployment steps?
Up hill side 1st then level with down hill side
When positioning for aerial usageon a hill, what side do you want to work of off?
The up hill side
What is the angle for maximum stability with a tractor drawn aerial?
60°
What is the most critical aspect of preparing an aerial device for use?
Apparatus stabilization
Where is the apparatus’s center of gravity located when parked with the aerial device in the stowed position?
Along the longitudinal midline of the chassis between the front and rear axles
What takes the weight when the aerial device is elevated from the resting position on the cradle?
Suspension
What is increased when stabilizers are deployed?
Base of stability
What happens to the center of gravity when extending the aerial device straight over the front of the apparatus?
Center of gravity shifts forward
What happens to the center of gravity when rotating the extended aerial device?
The center of gravity moves away from the longitudinal midline of the apparatus towards the side of aerial operation
What is the theoretical safety zone that surrounds the center of gravity on an aerial apparatus?
Gravity circle
What could happen if the gravity circle is extended beyond the base of stability on the short jacked side?
Overturn the apparatus
Which of these is not another name for stabilizers?
Base supports
Which of these is not a common style of stabilizers?
Beam-type
What does PTO stand for?
Power take-off
What is the main function of the PTO?
It provides power to the hydraulic pump
Which of these is not a common type of PTO?
Hydro
What type of PTO system are most newer apparatus equiped with?
Hot-shift
What is the advantage of a hot-shift PTO system?
It allows you to engage these systems when the main transmission is in neutral
Which of these is not a preliminary check before deploying stabilizers?
Position of stabilizers
How much space should be between the tire and the wheel chock?
Approximately 1”
Which of these is not something the apparatus operator should be observant of when deploying the stabilizers?
Solid concrete
What is the term for setting the stabilizers on one side of an apparatus shorter than the other side?
Short-jacking
Correction of lateral unevenness is possible on grades of what percent?
5%
What is the theoretical safety zone that surrounds the center of gravity on an aerial apparatus?
Gravity Circle
Newer apparatus may be equipped with limit switches, or these, that prevent the movement of an aerial to a short-jacked side.
Rotational Interlocks
What type of stabilizer extends straight away from the truck and have jacks that extend straight down to the ground?
H-Stabilizers
If a PTO activation switch is pneumatic, what is the minimum amount of air pressure that will be required for it to work properly?
50 psi
What is the flat metal plate attached to the bottom of the aerial apparatus stabilizer to provide firm footing?
Stabilizer Shoe
Which of the following is an acceptable stabilization site material?
Sidewalks
When the driver operator of an aerial apparatus operates the stabilizer control, what should the engine do?
Speed Up
What are the most common type of stabilizers on an aerial apparatus?
Box Stabilizer
When operating on level ground, what side of the aerial should be stabilized first?
It does not matter
What type of incorrect stabilization can result in damage to the suspension, torque box, and chassis?
Repetitive full deployment on one side
Setting the stabilizers on one side of an apparatus shorter than the stabilizers on the other side is called what?
Short-Jacking
These types of operations should be conducted with caution when short-jacking because it is very easy to trasnfer the weight to the opposite side from which the aerial is being operated.
Waterway operations
When stabilizing on uneven terrain, what type of uneveness is easier to correct?
Lateral unevenness
Correction of lateral unevenness is possible on grades of up to how many percent?
5 percent
A slope of 5 percent means that there is a rise in terrain height of how many feet?
5 feet for every 100 feet
Most manufacturers of aerials recommend lowering the stabilizers on which side of the vehicle first when operating on uneven terrain?
Uphill
After an aerial is completely stabilized on an uneven surface, what side is preferrable to work off of?
Over the uphill side
When the aerial device is properly bedded, the operator should then return the selector valve to what position?
Stabilization
What is a major risk of stabilization on icy or snowy surfaces?
Voids between the stabilizer and the ground can occur if snow and ice melt
Maximum stability is achieved when the angle of a tractor is how many degrees from the centerline of the trailer?
60 degrees
