16 - IFSTA Chapter 16 Flashcards
What NFPA standard should all aerial apparatus design requirements meet?
NFPA 1901
Which one of these is not one of the three basic categories that NFPA 1901 groups aerial devices into?
Quints
What is the hydraulically operated ladder or elevating platform attached to a specially designed fire apparatus?
Aerial Device
Which one of these is not one of the three main portions of an aerial ladder?
Cross Members
What is the fluid that allows force to be transmitted over a relatively large distance with little lose of power?
Hydraulic Fluid
What converts energy into linear mechanical force or motion, when pressurized oil is directed into a chamber created by fitting a piston into a cylinder barrel?
Hydraulic Cylinders
According to NFPA 1901, all manufactures of aerial devices must provide this in case of failure of the main hydraulic pump?
Auxiliary Hydraulic Pump
What devices are referred to as elevating or lifting cylinders?
Hositing Cylinders
What is the term for the pivoting end of the piston rod that is connected to the anchor ear by the heel pin in a hydraulic cylinder?
Trunnion
What are dual cylinders fitted on the base section and used to extend the second section of the aerial device?
Extension Cylinders
What type of elevating platform has a power-operated ladder, usually employing hydraulics, with a passenger carrying device attached to the end of the ladder?
Aerial Ladder Platform
What type of elevating platform is equiped with piping systems and nozzles for elevated master stream operations, but are not meant to be climbed?
Telescoping Aerial Platform
What type of elevating platform consists of two or more booms that are attached with hinges and operate in a folding manner?
Articulating Aerial Platform
Which one of these is not one of the NFPA 1901 established criteria for qualification as a quint?
Portable Generator
What generally operates on a large shear ball type bearing and its primary function is to provide continuous rotationon a horizontal plane?
Turntable
On hydraulically powered components, what is the term for a safety device that prevents a component from functioning?
Interlock
Which one of these is not one of the main components of a detachable ladder pipe system?
Check Valve
What NFPA standard establishes requirements for the quality of the air in breathing air systems on an aerial device?
NFPA 1989
What is the term for a step-up transformer that converts the vehicle’s 12 volt or 24 volt DC current into 110 or 220 volt AC current?
Inverter
During the tiller system inspection, since the tiller axle is a steering axle, steering wheel free play must not exceed how many inches on a 20” wheel or how many degrees on any other sized steering wheel?
2” & 10 degrees
Aerial ladder truss construction utilizes what shape for optimal strength
triangular
K-bracing is located where on aerial apparatus
spanning between the lower chords
The hydraulic system on aerial apparatus has four main components
actuators, hydraulic fluid, pump and reservoir
Hydraulic pumps on aerial apparatus are powered by
power-take-off
Two components of the hydraulic reservoir are
filters and oil coolers
Hydraulic hoses are rated to withstand pressure how many times the operating pressure
4
Components above the turn-table recieve hydraulic fluid through
hydraulic swivel
One of the most important valves responsible for either stabilizer or aerial control is
diverter
A hydraulic motor rotates the aerial device through what system
ring and pinion drive
Actuators
convert fluid power into mechanical
Rotary vane motors and cylinders are types of
actuators
Auxiliary hydraulic pumps can be operated
intervals of approximately 1 minute
Stabilizing cylinders main function is to
resist tipping
A hydraulic cylinder trunnion is attached to the end of
piston
If a safety valve is activated, the aerial device can be lowered by
manually bleeding the pressure
Extension cylinders on the aerial device are used to
extend the second section of the ladder
The working height for aerial ladders is measured from
ground to highest rung while fully elevated and extended
Minimum load of an elevated platform is 750 lbs when fully extended in any position, if the piping system is charged, what is the Max load
500 lbs
When operating a quint, in regards to postioning on scene, priority is
aerial operations
What are safety devices required on aerial apparatus to prevent the unsafe operation of opposing functions
interlock devices
Which of the following does NFPA 1901 require of a turntable control system station in an aerial apparatus?
The turntable control station must be able to override the platform control station
Which of the following types of pre-piped aerial ladder waterway systems allows the operator to secure the master stream monitor on two locations along the device?
Pinnable telescoping waterway systems
Which of the following interlock devices prevents the aerial device from dropping into the cradle if the master stream nozzle is not properly positioned?
Nozzle stow interlock
Which of the following is a type of ventilation equipment that is placed in windows, doors, or roof openings for drawing out heat, smoke, and gases by creating a lower pressure inside the fire building?
Exhaust fans (smoke ejectors)
Which of the following is one of the main uses of aerial ladders?
Elevated master stream application
Which of the following is one of the five features an apparatus must have in order to qualify as a quit according toNFPA 1901?
Water tank
What may quints be customized to accommodate differences in?
Water supply
Which of the following types of cylinders force the stabilizer arms outward and down to take as much of the weight of the apparatus off of the apparatus suspension as possible?
Stabilizer cylinders
Which of the following must the ladder compartment of the aerial apparatus include according to NFPA 1901?
Attic ladder
Which of the following is a type of construction used for sections of telescoping aerial platform devices?
Box beam construction
Why is a kickplate required at floor level of the elevated platform?
It prevents the firefighter’s feet from sliding off of the platform
What may happen if operators overtax the power-generating equipment when operating scene lights?
Poor lighting and may damage the power-generating unit or the lights
What is the primary difference between an elevating platform waterway system and a pre-pipped aerial ladder system?
The nozzle of the elevated platform waterway system is located in the platform instead of being at the end of the ladder
Which of the following is one of the most common materials used in the construction of aerial ladders?
Steel
During an operation inspection, if the truck begins to lean toward one side of the other after the stabilizers have been deployed for a while, what might this be a sign of?
A leak in the system
Which of the following is a loss control activity?
Salvage and overhaul
Why are bed ladder pipes often equiped with a solid stream nozzle?
Their inability to telescope prevents them from being positioned for effective fog stream application
Most water towers are designed so that their fire streams may be deployed at a range of elevations starting from a few degrees below horizontal to nearly how many degrees from the ground?
90 degrees
All elevating platform must have a minimum load capacity of how many pounds when the aerial device is fully extended at any elevation within its normal range of motion, and with no water in the piping system?
750 pounds
Who should inspect and test ventilation equipment on a regular basis?
Driver/operator
Aerial Ladder Truss’s are assembled of bracing bars or rods in what shape that forms a ridged framework for the aerial device?
Triangle
The fabricated structural members of a aerial ladder may be fastened by rivets or what and what?
Welded and heliarced
What one of the following is NOTone of the 4 main components of the hydaulic system?
Hydraulic lines
Why is hydraulic fluid used in aerial apparatus?
It’s practicaly incompressable
Hydralic systems work with pressure up to 3500 PSI. Why is it important use caution when looking for a pin hole leak?
It can cut through the skin
Hydralic hoses used on aerial apparatus must be able to handle pressures of what times normal operating pressures?
4
Wich one of the following is not a name for a 3 way valve that directs fluid to the system?
Stabalizer control valve
What type of force is created when hydraulic cylinders are engauged?
Linear
What does double acting hydraulic cylinder mean?
Fluid can be used to move in both directions
When using the auxilary hydraulic system what is the ratio of running to cooling time in minutes
1 and 1
How do you measure the working height of an aerial apparatus?
Ladder is fully extended, at maximum elevation to the ground
What is the name of the nozzel on the bottom of the aerial platform?
Fog curtain
What is the minimum square footage of an aerial platform?
14
Aerial platfroms 110 feet or less should be able to go from bedded to fully extended and raised in what time?
150 seconds
A safety device that prevents a component from functining when another component is functioning is called?
Inter lock
What is the name of the waterway that extends with the ladder?
Telescoping
A twisting action or an applied force resulting in a rotational twist is called?
Torsional
Operatinga hydraulic pump without allowing flow through the system; this generates tremendus heat and pressure and can damage components. This is called?
Deadheading
On a tiller steering axel wheel, free play should not exceed?
10 degrees
Adding hydraulic fluid when the stabilizers or aerial device are deployed can lead to overfilling the system which could result in hydraulic leaks and what?
Damage the system when Cylinders are retracted
What takes much of the apparatus’s weight off its suspension, providing a solid, stable base for operating the aerial device called?
Stablizing cylinders
The working height for aerial ladders is measured how while the ladder is is at maximum elevation and extension?
From the ground to the highest ladder rung
IFSTA divides the NFPA classification of elevating platform apparatus into how many distinct types of aerial devices?
2
What is an aerial device that consists of two or more booms that are attached with hinges and operate in a folding manner called?
Articulating aerial platform
A kickplate is required at floor level and should be how many inches high?
4
The heat reflective shield can lose its ability to reflect heat for all of the following reasons except what?
Heat
NFPA 1901 requires the protective water fog curtain nozzle flow at least how many GPM’s?
75
Elevating platforms must have a minimum load capacity of what when the aerial device is fully extended with no water in the piping system?
750 pounds
What is a mechanically applied rivit used in the construction of some aerial devices called?
Huck bolt
A twisting action or an applied force resulting in a rotational twist is called?
Torsional stress
Detachable ladder pipes should not have a horizontal range of movement exceeding how many degrees in either direction?
15
Electrical power cords should not exceed how many feet?
200
Operating a hydraulic pump without allowing flow through the system is called what?
Deadheading
Apparatus tests are grouped into two basic categories: preservice tests and what?
Service tests
All elevating platforms are required to have how many operator control stations?
2
The water delivery system must be capable of discharging at least how many GPM’s?
1,000
Elevating platforms that are 110 feet or shorter should be able to be from the bedded position to the maximum elevation and extension and be rotated 90 degrees in how many seconds or less?
150
The most common aerial ladder platform apparatus in service today is what?
Straight chassis, three-axle vehicle with a rear-mounted aerial device
Tubular steel or aluminum used to form a box shape using cantilever or triangular truss designed is either welded or what?
Huck bolted
Quints have all the following except what?
500 gallon water tank
A hydraulic system has four main components: actuators, hydraulic fluid, a hydraulic pump, and a hydraulic reservoir. Which component transforms power into mechanical force?
Actuator
Hydraulic fluid is used because it is practically incompressible, and it allows force to be transmitted over a relatively large distance with little loss of power. Depending on the manufacturer of the aerial apparatus, how much pressure may the fluid be under?
3,500 psi
A series of tubes and hoses supply hydraulic fluid throughout the system. Most manufacturers use steel tubing and aircraft-type, steel-braided hose. Hose must be rated to withstand pressures of at least how many times greater than normal operating pressure?
4
What converts energy in the system into linear mechanical force or motion when pressurized hydraulic oil is directed into a chamber created by fitting a piston into a cylindrical barrel?
Hydraulic cylinder
Auxiliary pumps are neither designed nor intended to be used for long periods of operation. In fact, they should be operated only for intervals of about how long, with an equal amount of rest between operations?
1 minute
All elevating platforms must have a minimum load capacity of 750 pounds (375 kg) when the aerial device is fully extended, at any elevation within its normal range of motion, and with no water in the piping system. What does this load requirement drop to when the water delivery system is charged?
500lbs
The water delivery system must be capable of discharging at least how many gpm at what psi nozzle pressure when the aerial device is in any position?
1,000 gpm @ 100 psi
Most control pedestals have three separate levers designed to give the operator control when maneuvering the aerial device at the turntable. Because an aerial operator should operate the aerial device in a specific sequence, in what order are these levers located from right to left on the pedestal?
Elevate, rotate, extend
What is defined as a safety device that prevents a component from functioning when another component is functioning, and may be a combination of mechanical limit switches or incorporated into computer control algorithms?
Interlock device
With detachable ladder pipe systems, the nozzle reaction of solid and fog master streams may cause an excessive side twist to an extended aerial ladder if the stream is projected toward either side of the ladder. How much do most ladders with detachable ladder pipe appliances restrict the sideways movement of the nozzle?
About 15 degrees either side of center
Which is also known as the transfer or diverter valve, a three-way valve that directs fluid to different places?
Selector valve
What is the required minimum floor area of an elevated platform?
14 sq. ft.
What is the minimum height requirement for a kickplate which prevents the firefighter’s feet from sliding off of the platform in case of a slip or fall?
4 inches
What is the minimum required flow for a protective water fog curtain nozzle provided on the bottom of the platform?
75 gpm
What is the minimum load capacity on all elevating platforms when fully extended?
750lbs
What is the name of the steel that is used for the extension and retraction cables, is resistant to abrasion, and is usually corrosion-resistant aircraft quality cables made with a very high strength?
Plow steel
What does it mean if the truck begins to lean toward one side or the other after the stabilizers have been deployed for a while?
A possible leak
What is the primary function of the turntable?
Provide rotation of the aerial device
What valves prevent unintentional or undesirable motion of the device from its established position?
Counterbalance valves
Which type of cylinder is a hydraulic cylinder used to lift the aerial device from its bed to a working position?
Hoisting cylinder
The supporting beams of the aerial ladder are of what type of construction?
aerial truss construction
What are the most common materials for construction of aerial ladders?
heat-treated aluminum alloy and steel
What is the medium that a hydraulic system uses to transmit force?
hydraulic fluid
What prevents unintentional or undesirable motion of the device from its established position?
counterbalance valves
What is one of the most important valves in the hydraulic system?
selector valves
what is the required minimum floor area of an elevated platform?
14ft²
NFPA 1901 requires a protective fog curtain nozzle that flows how many gallons per minute?
75
For elevating platforms that are 110’ or shorter, what is the maximum amount of time allotted for it to be raised from the bedded position to the maximum elevation and extension and be rotated 90 degrees?
150 seconds
For elevating platforms that are taller than 110’, what is the maximum amount of time allotted for it to be raised from the bedded position to the maximum elevation and extension and be rotated 90 degrees?
there is no time requirement
The working height of all types of elevating platforms is measured from the ground to where?
top surface of the highest platform handrail
aerial stabilizer, body collision, maximum elevation slow-down, and retraction are what types of safety devices?
interlocks
What is the oldest type of pre-piped aerial waterway?
bed ladder system
Most ladders with detachable ladder pipe appliances restrict the sideways movement of the nozzle to about 15 degrees to either side of center to prevent what?
torsional stress
What is the name of the step-up transformer that converts the vehicle’s 12- or 24- volt DC current into 110- or 220 AC current?
invertor
Who dictates the variety of ground ladders on aerial apparatus?
NFPA 1901, insurance industry, or the AHJ
Which NFPA outlines apparatus inspection testing?
1911
When testing the EPU, the main hydraulic system should be disengaged, and a control valve must be open before turning on the pump to prevent what?
deadheading
What kind of testing is performed after accidents, unusual stresses and loads, major repairs and/or every five years?
nondestructive testing
With the ladder at maximum elevation and extension, what is determined when you measure from the ground to the highest ladder rung?
maximum working height
What is the purpose of integral safety valves?
lock and hold oil in the cylinder in the event of a leak
All of the following are examples of an elevating platform apparatus except:
water towers
What are the two most common materials used in the construction of aerial ladders?
steel and aluminum
How are the fabricated truss members located on an aerial device secured together?
welded
What truss configuration provides the greatest overall structural strength?
K-bracing
What are the main components of a hydraulic system?
Actuator, hydraulic fluid, hydraulic pump and hydraulic reservoir
Hydraulic fluid is best described as:
an incompressible liquid
What part of a hydraulic system is used as a medium to transmit force?
hydraulic fluid
Hydraulic fluid traveling through the hydraulic lines could be under pressures up to:
3,500 psi
How is force created within a hydraulic system?
by a hydraulic pump powered by a PTO
Where does hydraulic fluid go after it is displaced out of the system?
into the reservoir
The steel braided cables located within a hydraulic system must be able to withstand pressures:
4 times greater than normal operating pressures
Hydraulic cylinders located on aerial apparatus convert energy in the system into:
linear mechanical energy
What is the valve located within a hydraulic system that prevents fluid from flowing backward through a component and can act as a safety feature in the event a leak develops in the system?
check valve
Which of the following is the valve found on an aerial apparatus hydraulic system that directs fluid to either the stabilizer controls or the aerial device?
selector valve
What is the minimum load capacity for all elevating platforms when the aerial device is fully extended, at any elevation within its normal operating range and with no water flowing through the piping system ?
500 lbs.
Elevating platforms that are 110’ or shorter in height should be able to raise from the bedded position to the maximum elevation and extension within:
150 seconds or less
When should you check the hydraulic fluid level in the hydraulic fluid reservoir on an aerial apparatus?
cold/ stowed
When does loss control measures begin on a suppression incident?
when companies leave the station
When are service tests conducted on aerial apparatus?
yearly
How often is nondestructive testing conducted on aerial apparatus?
every 5 years
What is the NFPA Standard for Automotive Fire Apparatus?
1901
What is a fire fighting vehicle that is equipped with a hydraulically operated ladder?
Aerial Apparatus
The assembly of bracing bars in triangular shapes that form a rigid framework for the aerial device is what?
Aerial Ladder Truss
Which of the following is not one of the four main components of a hydraulic system?
Fuel-Water Seperator
Steering wheel free play must not exceed how many inches or how many degrees on a 20” wheel?
2” or 10 degrees
Which of the following is not a ladder requirement by NFPA 1901?
A multi-task A Frame Ladder
How is maximum working height calculated?
With the ladder at maximum elevation and extension, measure from the ground to the highest ladder rung
Which does not describe what the selector valve does?
In the event of pump failure, it diverts hydraulic fluid from the primary hydraulic pump to the auxiliary pump
What is the purpose of an auxiliary hydraulic pump on an aerial apparatus?
For use in the event of a failure of the main hydraulic pump
What is the pivoting end of the piston rod that is connected to the anchor ear by the heal pin called?
Trunnion
What is the minimum required floor area of a platform?
14 sqft
A protective water fog curtain nozzle must flow at least how many GPM?
75 gpm
What is the minimum load capacity an elevating platform must have?
750 lbs
For elevating platforms less than 110’ what is the maximum amount of time it should take to go from bedded to the maximum elevation and extension and rotated 90 degrees?
150 seconds
What should the order of the levers in a control pedestal be (from right to left)?
Elevation, rotation, extension
What interlock device will not allow rotation over the side of the apparaatus where the stabilizers are not fully extended
Rotation Interlock
An inverter converts what type of power?
DC to AC
What operation could result in hydraulic leaks and damage to the system when cylinders are retracted?
Adding hydraulic fluid while the stabilizers are deployed
When testing the emergency power unit, the main hydraulic system should be disengaged and a control valve must be open before turning on the pump to prevent what?
Deadheading
What is deadheading?
Operating a hydraulic pump without allowing flow through the system
NFPA 1901 groups aerial devices into what three basic categories?
Aerial ladders, elevating platforms, and water towers
What does a properly designed truss allow a ladder to do?
It allows tension and compression to be distributed over the length of the ladder
What are the two most common materials for construction of aerial ladders?
Heat-treated aluminum alloy, and steel
What are the three main portions of an aerial ladder to which firefighters and driver/operators commonly refer?
Base rails, top rails, and rungs
What are base rails commonly called?
Beams
What are top rails commonly called?
Handrails
Aerial ladders built with what key feature provides greater strength than those with older designs?
K-bracing
What is the time criteria for an apparatus based on?
It’s aerial type
What are the four main components of a hydraulic system?
Actuators, hydraulic fluid, hydraulic pump, and hydraulic reservoir
What are the three main types of pumps used for the hydraulic system?
Load sensing piston pump, rotary vane pump, and rotary gear positive-displacement pump
The hose used for hydraulic lines must be rated to withstand what kind of pressure?
Four times greater than normal operating pressure
What prevents fluid from flowing backward through a component and acts as a safety feature in the event that a leak develops in the system?
Check valves
What limits pressure buildup in the system?
Relief valves
What prevents unintentional or undesirable motion of the device from its established position?
Counterbalance valves
What is a three-way valve that directs fluid to either the stabilizer control valves or the aerial device control valves?
Selector valve
Auxilary hydraulic pumps should be operated for how long of intervals?
One minute intervals
How many cylinders may each stabilizer be operated by?
One or two
Hoisting clyinders are sometimes referred to as what other type of cylinder?
Elevating or lift cylinders
What is anchored to the aerial device or turntable and fitted at the end of the piston rod outside the cylinder?
Trunnion
All elevating platforms must have a minimum load capacity of how many pounds?
750 lbs
All aerial apparatus should meet the design requirements of what NFPA standard?
NFPA 1901
Which of the following is not one of the three basic categories of aerial apparatus?
Tractor drawn aerials
What is the assembly of bracing bars or rods in triangular shapes that form a rigid framework for the aerial?
Truss
What is the device that transfers the center of gravity of an apparatus and prevents it from tipping?
Stabilizers
What are the four main components of a hydraulic system?
Actuators, hydraulic fluid, hydraulic pump, and a hydraulic reservoir
Hydraulic fluid is commonly used because of what reason?
It is practically incompressible
What part of a hydraulic system supplies the hydraulic fluid that is moved in and out of the system?
Hydraulic reservior
What is the three way valve that directs hydraulic fluid to either the stablizer control valves or the aerial device?
Selector valve
The 12-volt DC electrical pump that is connected to the vehicles battery is known as what?
The auxillary pump
What piece is responsible for elevating the aerial device from its stowed position?
Hoisting cylinders
The hoisting cylinders are attached to the aerial device or turntable by what piece?
A trunnion
What is the normal hydraulic pressure range?
850 to 3,000 PSI
How is the working height of an aerial ladder messured?
From the ground to the highest ladder rung with the ladder at maximum elevation and extension
What is the required minimum floor area of a platform aerial?
14 Sq. ft.
Each platform must have a rail completely enclosing the floor area with no opening under the railing greater than what?
24 inches
NFPA 1901 requires that the nozzle of a water curtain on a platform device be capable of flowing what volume?
75 GPM
Elevating platforms that are 110 feet or shorter should be able to be raised from the bedded position to the maximum elevation and extension, and be rotated 90 degrees in what time frame?
150 seconds or less
A safety device that prevents a component from functioning when another component is functioning is known as what?
Interlock
In a telescoping waterway system, generally what is the minimum internal diameter of the piping system?
4 inches
What is the NFPA “Standard on Breathing Air Quality for Emergency Services Respiratory Protection” that establishes the requirements for the quality of the air in breathing air systems?
NFPA 1989
Which of the following is one of the most common materials used in the construction of aerial ladders?
steel
Which of the following NFPA standards establishes requirements for dimensions of sections and structural members of aerial ladders?
NFPA 1901
Which of the following hydraulic system components is the medium by which the system transmits force?
hydraulic fluid
The valves that prevent unintentional or undesirable motion of the aerial device from its established position are known as?
counterbalance valves
Which of the following types of cylinders force the stabilizer arms outward and down to take much of the weight of the apparatus off of the apparatus suspension?
stabilizer cylinders
All elevated platforms fully extended, at any elevation within its normal range of motion must have a minimum load capacity of ?
750 pounds
A kickplate is required at floor level of the elevated platform because?
it prevents the firefighters feet from sliding off the platform
The working height of all types of elevating platforms are measured from?
the highest platform handrail when the aerial device is at maximum extension and elevation
Which of the following allows various sections of the aerial device to extend and retract without causing excessive wear on parts of the device?
slides and rollers
Which of the following is the primary function of a turntable?
to provide continuous rotation on a horizontal plane
Which of the following interlock devices prevents the aerial device from rotating over the side of the apparatus where stabilizers are not fully extended?
rotation interlock
Which of the following interlock devices prevents the aerial device from dropping into the cradle if the master stream nozzle is not properly positioned?
nozzle stow interlock
NFPA 1901 requires two-way communication systems on all?
aerial device apparatus
Which of the following is useful when electric power is needed in an area not accessible to the vehicle mounted system?
portable generators
Which of the following types of power distribution equipment should be carried so that equipment can be interchanged in situations where mutual aid departments may have different sizes or types for types of receptacles?
adapters
Which of the following is a common hydraulic power tool that may be carried by aerial apparatus?
spreaders
Which of the following must the ladder compartment of the aerial apparatus include according to NFPA 1901?
attic ladder
The driver/operator should be familiar with the location, operation, and inspection of forcible entry equipment carried on aerial apparatus, what else should they know?
servicing
Which of the following is a loss control activity?
salvage and overhaul
All apparatus tests should conform to the most current editions of?
NFPA 1901 and NFPA 1911
All aerial apparatus should meet the design requirements of what NFPA standard?
1901
Which NFPA standard is the Standard for Automotive Fire Apparatus?
1901
Which of the following is not one of the three main portions of an aerial ladder?
Ladder truss
Aerial ladders designed and built with what type of bracing provide greater stength than older designs?
K bracing
What are the main compenents of a hydraulic system?
Actuators, Hydraulic fluid, Hydraulic pump, hydraulic reservoir
Hydraulic fluid can be under as much as how many psi?
3,500 psi
Hydraulic hose must be rated to withstand pressures how many times greater than normal operating pressure?
Four times the normal operating pressure
What is the typical voltage on an electric auxiliary hydraulic pump that is connected to the vehicles battery?
12 volt
Auxiliary hydraulic pumps should be operated in intervals of what?
One minute
All auxiiliary pumps should be tested regularly in accordance with what NFPA standard?
1911
What is the normal hydraulic pressure range?
850 to 3,000 psi
What is the required minimum floor area for all elevating platforms?
14 square feet
Each platform must have a rail completely enclosing the floor area with no opening under the railing greater than how many inches?
24 inches
What is the required height of the kickplate?
4 inches
NFPA 1901 requires what to be at the bottom of the elevated platform?
Fog curtain nozzle
NFPA 1901 requires the protective fog curtain nozzle to flow at least how many GPMs?
75 gpm
What is the minimum load capacity when an aerial is fully extended, at any elevation, with no water in the piping system?
750 lbs
What does the load requirement drop to once the water delivery system is charged?
500 lbs
Elevating platforms that are 100 feet or shorter should be raised from the bedded position to the maximum elevation and extension and rotated 90 degrees in how many seconds?
150 seconds
What NFPA is the Standard on Breathing Air Quality for Emergendy Services Respiratory Protection?
1989
There are how many categories of aerial devices?
3
All aerial apparatus should meet the design requirements of what NFPA standard?
1901
Elevating platform apparatus is further classified into how many categories?
3
The base rails are also called what?
Beams
The fabricated structural members may be fastened by rivets, heliarced or what?
Welded
A hydraulic system has how many main components?
4
Depending on the manufacturer of the aerial apparatus, the fluid may be under pressures of what?
3,500 PSI or more
The three-way valve on a fire department aerial apparatus that directs oil to either stabilizer control valves or the aerial device control valves is called what?
Diverter valve
How many rotary motor systems on the aerial apparatus?
2
With the ladder at maximum elevation and extension how do you measure the maximum working height?
From the ground to the highest ladder rung
A kickplate that runs around the bottom edge of any railingon a balcony is how big of a plate?
4 inches
NFPA 1901 requires the nozzle of a protective water fog curtain to be able to flow at least what?
75 GPM
All elevating platforms must have a minimum load capacity of what?
750 pounds
Standard articulating aerial platforms range in height from what to what?
55-85 feet
Detachable ladder pipes should not have a horizontal range of movement exceeding how many degrees in both directions?
15
Hydraulic extrication tool systems with hose distances of what or greater from the hydraulic pumpmay have a negative effect on tool operations
100 feet
What NFPA standard contains a list of the minimum equipment with which each aerial apparatus should be equipped
1901
Aerial apparatus must be equipped with salvage covors and how many scoop shovels?
2
Operating a hydraulic pump without allowing flow through the system is called what?
Deadheading
What is the method of testing metal objects that does not subject them to stress-related damage?
Nondestructive
All of the following are factors that fd consider when designing apparatus except:
Bridges weight capacity
What is one of the 3 basic categories NFPA group aerial devices?
Water tower
Which category does telescoping aerial platforms belong to?
Elevating platform apparatus
What is the general term used to describe the hydraulically operated ladder attached to a specially designed apparatus?
Aerial device
Why is an aerial apparatus unique?
It is equipped with one of several varieties of aerial devices
What are the two most common materials for aerial ladder construction?
Heat treated aluminum alloy and steel
An actuator is part of what type of system?
Hydraulic
What are the hydraulic hoses rated at?
At least four times greater than normal operating pressure
Why is the selector valve considered one of the most important valves in the system?
Directs fluuid to either the stabilizer control valve or to the aerial device control valve
Choose the most accurate about, once the hydraulic fluid is directed into one operating system, what is used to control the power?
Monitor valves and stack valves
What happens when double acting cylinders are capable of receiving oil under pressure?
Force can be created in either direction
What is the difference between an auxiliary pump amd a main pump?
It provides motion at a reduced speed
How can a turntable rotate if there is a sysem failure?
By using a hand crank
What is the main function of the hoistiing cylinders?
Elevate the aerial device from its stow position
What is the normal hydraulic pressure?
From 850 to 3,000
Choose the most accurate about aerial ladders?
They may be mounted on either a 2 or 3 axle, single chassis vehicle
Why are tandem front steer axles currently entering the market?
Because of the heavier weights carried
Which aerial device is not design to be climbed?
Telescoping aerial
What is the minimum required floor area of a platform?
14 square feet
What does NFPA1901 require for an aerial platform?
Protective water fog curtain nozzle
What part of an aerial is the section that is extended beyond the base section?
Fly section
What is the name for the valve that directs fluid to either the stabilizer control valves or the aerial device control valves?
Selector Valve
What is the name for the valve that prevents fluid from flowing backward through a component and act as a safety feature in the event that a leak developes in the system?
Check Valve
What is the name for the valve that prevents unintentional or undesirable motion of the device from its established position?
Counterbalance valve
The end of the piston rod outside the cylinder is fitted with what, that is anchored to the aerial device or to the turntable?
Trunion
Which of the following is not a main use of aerial ladders?
Forcible entry
According to NFPA 1901, the water fog curtain on an elevated platform must flow at least?
75 GPM
All elevating platforms must have a minimum load capacity of what?
750 lbs
What is utilized in order to allow the various sections of the aerial device to extend and retract without causing excessive wear on the parts of the device that come in contact with each other during operation?
Slide and rollers
Which interlock device will not allow the aerial device to rotate over a side of the apparatus where the stabilizers are not fully extended?
Rotational interlock
Which NFPA standard established standard on breathing air quality for emergency services respiratory protection?
1989
What is the typical volt capacity of a portable generator?
100- and/or 220-
Which type of ventilation equipment is ideal for drawing out heat, smoke, and gases by creating a lower pressure inside the fire building?
Smoke ejector
In what position should the aerial device and stabilizers be in when checking the hydraulic fluid?
Stowed
What is most likely the cause if the truck begins to lean toward one side after the stabilizers have been deployed fora while?
Leak in the system
Preservice tests and service tests of aerial apparatus should conform to which two NFPA standards?
1901 and 1911
What is a twisting action applied to an aerial referred to as?
Torsional stress
Detachable ladder pipes should not have a horizontal range of movement exceeding?
15 degrees
What is the required minimum floor area of a aerial platform?
14 square feet
