Chapter 11 - Fireground Pump Operations

What is the name of the process the IC makes to determine if lives can be saved without unnecessary risks to firefighters?

Risk-benefit analysis

In the simplest terms, what type of operational strategy indicates that no one is entering an IDLH environment?

Defensive strategy

What type of attack is made by firefighters directing the water stream toward the ceiling or banking off walls to cool the room?

Indirect

When making an indirect fire attack from an interior position, firefighters should remain outside the fire compartment due to:

Creation of a large volume of steam

What attack strategy combines cooling the hot gas layer by moving the nozzle from the area overhead to the floor in a T, Z, or rotational pattern?

Combination

What type of attack uses an exterior fire attack through a ventilation opening to help a fire transition from vent limited conditions to fuel limited conditions?

Transitional

Sprinkler systems support the flow of sprinklers based on the:

Hazard being protected

When should the occupancies with automatic sprinklers, FDC, and their closest hydrants be identified?

During preincident planning

When supplying a fire sprinkler system, D/O should charge the FDC:

When the IC gives the order

A sprinkler systems FDC may consist of a:

Siamese valve

When flowing to a commercial sprinkler system with a multistage pump, set the transfer valve to the:

Parallel (volume) position

According to NFPA 13E, unless otherwise posted, the general guideline is to supply a sprinkler system with ___ into the FDC

150 psi (1050 kPa)

According to NFPA 13E, a residential sprinkler system should be pressurized to:

No more than water main pressure

A standpipe system may consist of a single vertical pipe known as a:

Riser

Wen supplying a standpipe system, hydraulic calculations for flows exceeding 350 gpm (1400 L/min) should include the following pressure loss in the standpipe:

25 psi (175 kPa)

A D/O can encounter a standpipe system with pressure-regulating devices in:

High-rise buildings

When operating hose lines from a standpipe, the D/O should add ___ for each floor above the FDC due to elevation

5 psi (35kPa)

If an FDC has a frozen swivel, fire personnel can use a double male coupling with a:

Double female coupling

If an individual hose valve on an upper floor fails, personnel can use:

A hose valve on the next floor down

In what situation might an aerial device be used as a standpipe to supply hose lines?

When the fire is higher than the reach of the aerial device

What should the D/O do if the pump does not develop pressure?

Ensure that the pump is properly engaged

Relay pumping is used when:

The water source is remote from the scene

The closed relay method of relay pumping involves:

Hose lines from a water source and between each pumper in the relay

The open relay method of relay pumping involves:

Folding drop tanks at the intake of each pumper

This type of valve is located on an intake relief valve to vent air from the hose before it travels down the line

Bleeder

During relay pumping, what are the types of hose lines that may be connected to different pumpers using a discharge manifold?

Large and medium diameter hose

What is the effect of increasing the discharge pressure above 150 psi (1005 kPa) in relay pumping operations?

It does not necessarily increase the volume of water through the system

When relay pumping, the D/O should maintain a residual pressure at the next pumper in the relay of:

20-50 psi (140-210 kPa)

A relay pumping operation begins with the largest capacity pumper working:

From the water source

When operating in a relay, apparatus equipped with pressure governors should be set in the ___ mode when acting as the attack pumper

Pressure

Apparatus equipped with pressure governors should be set in the ___ mode when working as a relay pumper

RPM

For relay pumpers equipped with an adjustable intake relief valve, the valve should be set to ___ above the static pressure of the water system or discharge pressure of the previous pumper in the relay

10 psi (70 kPa)

When the need for relay pumping has ended, the operation should be discontinued starting from the:

Fire scene

Fire pumpers placed in tandem are used to:

Increase pressure to the attack pumper

In tandem pumping operations, the distance between apparatus may be up to:

300 ft (90m)

This valve is used on a hydrant, and its use resembles a tandem pumping operation

Hydrant assist

Pumps supplying a relay operation or a master stream require the use of a ___ setting of the transfer valve

Parallel

During relay pumping, if the master intake gauge falls below 20 psi (140 kPa), increasing the throttle:

May cause the pump to cavitate

During tandem pumping operations, the D/O can follow several methods for preventing pump overheating, including:

Establishing a continuous minimum flow of water

In dual pumping operations:

One hydrant supplies two fire pumps

A hydrant used for dual pumping should have a flow greater than:

1000 gpm (4000 L/min)