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
