Place the steps for Part 2 of the PRESSURE CONTROL TEST in the correct order.
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1. Set the fire pump so that it is charging at a net pump discharge pressure of
150 psi.
2. Reduce the pumping engine throttle until the net pump discharge pressure
drops to 90 psi.
3. Set the pressure control device to maintain the discharge pressure at 90 psi.
, 4. Close the flowing valves one at a time.
5. The pump discharge pressure should rise no more than 30 psi when all
valves are closed.
In centrifugal pumps, to correct for lateral thrust wear on parts, the pump:
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Has water enter the impeller in both directions.
Determine the TPL for a hose assembly in which two 700-foot sections of 2 1/2-inch hose
and one 700-foot section of 3-inch hose with 2 1/2-inch couplings are siamesed together
to supply 300 feet of 3-inch hose with 2 1/2-inch couplings flow is 200 gpm.
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14.08 psi
You figure pressure loss in a single hoseline flowing at 350 gpm to be 45 psi. Then, the
layout is altered by adding an appliance, and the nozzle is taken to the sixth floor of a
burning structure. The friction loss for this new layout is now:
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, 80 psi
NFPA rates all fire pumps to meet their capacity from a draft at:
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10 feet of lift.
All of the following are important reasons for maintaining inspection documentation on a
fire apparatus EXCEPT:
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Verifying that you are inspecting the correct apparatus.
Identify the THREE items that must have occurred prior to raising the cab.
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1. All loose items in the cab have been secured.
2. All cab doors have been securely closed.
3. Adequate front and overhead clearance has been ensured.
Give this one a try later!
1. Set the fire pump so that it is charging at a net pump discharge pressure of
150 psi.
2. Reduce the pumping engine throttle until the net pump discharge pressure
drops to 90 psi.
3. Set the pressure control device to maintain the discharge pressure at 90 psi.
, 4. Close the flowing valves one at a time.
5. The pump discharge pressure should rise no more than 30 psi when all
valves are closed.
In centrifugal pumps, to correct for lateral thrust wear on parts, the pump:
Give this one a try later!
Has water enter the impeller in both directions.
Determine the TPL for a hose assembly in which two 700-foot sections of 2 1/2-inch hose
and one 700-foot section of 3-inch hose with 2 1/2-inch couplings are siamesed together
to supply 300 feet of 3-inch hose with 2 1/2-inch couplings flow is 200 gpm.
Give this one a try later!
14.08 psi
You figure pressure loss in a single hoseline flowing at 350 gpm to be 45 psi. Then, the
layout is altered by adding an appliance, and the nozzle is taken to the sixth floor of a
burning structure. The friction loss for this new layout is now:
Give this one a try later!
, 80 psi
NFPA rates all fire pumps to meet their capacity from a draft at:
Give this one a try later!
10 feet of lift.
All of the following are important reasons for maintaining inspection documentation on a
fire apparatus EXCEPT:
Give this one a try later!
Verifying that you are inspecting the correct apparatus.
Identify the THREE items that must have occurred prior to raising the cab.
Give this one a try later!
1. All loose items in the cab have been secured.
2. All cab doors have been securely closed.
3. Adequate front and overhead clearance has been ensured.
