Chapter 16 Flashcards
The pump used for the hydraulic system is either a load sensing piston pump, rotary vane pump or?
Rotary gear positive displacement pump
A 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?
Selector valve
In a hydraulic cylinder the pivoting end of the Piston rod that is connected to the anchor ear by the heel pin is called a?
Trunnion
Hydraulic cylinders used to lift the aerial device from its bed to a working position also known as a lift cylinder is called a?
Hoisting cylinder
An aerial ladders made in North America the fully extended working length ranges from _____ to ______ feet?
50 to 137ft
What is the maximum working height for a ladder at maximum elevation and extension?
Measure from the ground to the highest ladder rung to determine it’s working height
A mechanically applied rivet used in the construction of some aerial devices is called?
Huck Bolt
The extension and retraction cables are usually corrosion resistant aircraft quality cables made with a very high strength steel called?
Plow steel and are resistant to abrasion
A safety device that prevents a component from functioning when another component is functioning is called?
Interlock
NFPA 1901 groups aerial ladders into three basic categories?
Ariel ladders
Elevating platforms
Water towers
The supporting beams of the ladder are of aerial ladder _______
construction?
Truss
Assembly of bracing bars or rods in triangular shapes that form a rigid framework for the aerial device?
Aerial Ladder Truss
What are the two most common materials for construction of aerial ladders?
Heat treated aluminum alloy and steel
A hydraulic system has four main components?
Actuators
hydraulic fluid
Hydraulic pump
Hydraulic reservoir
A safety device that prevents a component from functioning when another component is functioning?
Interlock
