Chapter 12 Hoses Flashcards
Engine is equipped with two centrifugal pumps, whats the rated capacity and max pressure?
7000 LPM
600 PSI
Idle pressure of volume in an apparatus
250kpa
36psi
What’s the Idle pressure of apparatus in pressure operation
500 KPA
73 PSI
Difference between pressure operation and volume operation
Volume operation both pumps work in parallel. Water passed though both stages at the same time.
Pressure operation water passes through the first stage then gains additional boost through the second stage before entering the discharge manifold
Size of intakes on CFD Apparatus
125mm
65mm
Discharge connection sized
38mm
65mm
125mm
Should Intakes be operated in fully opened positions or partially opened positions?
Fully open positions unless the operator determines a need to reduce incoming water pressure.
Should discharge connections be operated in fully opened positions or partially opened positions?
Partially opened to regulate pressure.
What are Drain valves?
Drain valves are used to drain water out of the hoses and the pump (master drain valve)
What are bleeder valves and where are they located?
There’s a bleeder valve for each 125 mm intake, and it’s used to bleed the air from the line before it can reach the pump Cause loss of prime during pumping operations
What on the panel controls the flow of water via gated intakes and discharges
Levers and Electronic controls
What are two primary types of fire hoses carried on CFD apparatuses?
Supply hose and attack hose
What is the diameter and length of a supply hose?
Diameter, 125mm
Length, 30m
What is the diameter and lenghts of attack hose?
Diameters: 44 mm and 65 mm
Lengths: 15m,
However there’s 44mm hose pack, 38mm wild land hose pack, and 19mm econo roll at 30m lenghts
125mm hose location and quantity
10 lengths (300m/1000ft) supply
Yellow
200psi (1400kpa)
