Chapter 11 Quiz Flashcards
During the process of drafting the priming device exhausts the air from the intake hose and fire pump creating the pressure difference between the inside of the pump the intake hose and the atmosphere
The pressure in the intake hose and in the pump drops lower than the atmospheric pressure
Is not attainable using a fire department pumpers meaning that pumpers cannot be expected to draft water that is located 33.9 feet below the level of the pump
Total vacuum
Is defined as the greatest height to which any amount of water maybe raised through an intake hose to the pump
Maximum lift
The height a column of water maybe lifted in sufficient quantity to provide a reliable fire flow
Dependable lift
Driver operators must be able to evaluate conditions that affect water source accessibility, many different problems may impede access including.
Inability to position the pumper close enough to the water Inadequate depth of water source Wet soft ground approaches Silt or debris laden water Freezing weather Swift water
Although most often used for domestic or agricultural purposes, some are specifically constructed and place for fire department use
Cistern
Maybe more accessible to fire apparatus than natural bodies of water because of their installation at a working facility
Ground reservoirs
Supply water via open canals and portable pipes. Open canals running through a property may feature several sites suitable for drafting by fire department PUMPERs
Agricultural irrigation systems
When evaluating a potential water supply source first determine its
Adequacy and accessibility
Artificial static water supply sources
Cisterns, private water storage tanks, ground reservoirs, swimming pools, agricultural irrigation systems
Swimming pools as a static water supply source should preplan operations for
Accessibility and minimization of property damage
