Part 2 Flashcards by Jade Boulton

To effectively judge the ability of a vehicle to pass through areas of restricted horizontal and vertical openings, you must know

Vehicle dimension

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While participating in the diminishing clearance exercise, you must stop the apparatus with the front bumper within _____ inches of the finishing line

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The purpose of the diminishing clearance driving skill is to measure a driver’s ability to

Steer apparatus in a straight line

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When more than one emergency vehicle are responding along the same route, units should travel at least ______ feet apart

300-500 feet

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While responding to an emergency where all lanes of traffic are blocked in the same direction, you may:

Move the apparatus into the opposing lane of traffic and proceed through the intersection at a reduced rate of speed

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Studies have shown that an emergency vehicle traveling faster than ______ mph can possibly outrun the effective range of its audible warning device

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Which is correct for safe operation and driving of aerial apparatus?

Be aware of the route’s general road and traffic conditions

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These use of warning devices:

Negates some traffic laws

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Many traffic accidents involving apparatus are caused by the operator

Being unaware of the vehicle potential for disaster

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While responding to a call and you encounter a school bus with flashing lights, you must stop, then proceed

Only after a proper signal is given by the bus driver or police officer

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During an evasive maneuver, you should

Always leave a way out

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When faved with a situation requiring evasive tactics, you should attempt to pass the overtaken vehicle on

The left side

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When left idling because of cold weather or floodlight operations, diesel engines should be set at:

High idle.

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The purpose of an inverter on an apparatus is to transform

DC current into AC

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NFPA 1901 establishes minimum requirement for forcible entry that specifically includes

Pickhead axes

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The NFPA 1901 Standard requires all newer aerial apparatus to be equipped with a(an):

Two-way communication system

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Which statement regarding vehicle-mounted generators is true?

They usually have a larger capacity than portable unit

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Which statement regarding transmission - driven generators is true

They may provide 25,000 kilowatts or more

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A disadvantage of having inverters is

Limited mobility from the vehicle

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An advantage of having inverters is

Low or non-existent noise during operations

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Which salvage, overhaul and loss control equipment are specifically required to be carried on an aerial by NFPA 1901?

Multiple salvage covers and two scoop shovels

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While conducting a pump capacity test, if the net pump pressure is correct but the nozzle flow (gpm) is too high, the:

Discharge gate must be closed further, decreasing throttle

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The 50 percent annual pump test on a quint apparatus is conducted at a net pump pressure of

250 psi for 10 min

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During an annual pump test, an apparatus should deliver ____ of its rated capacity at 150 psi pump pressure for 20 mins

100%

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Which condition should be between 0’F and 100’F during a service pump test?

Atmospheric temperature

A ______ gauge is designed to read both positive and negative pressure

Compound

Pumps on aerial apparatus should be hydrostatically tested at ______ psi for ______ minutes

510 psi, ten mins

Which valve determines whether the pump is operating in series or pressure mode?

Transfer valve

You should switch form pressure to volume mode when

More than half the rated capacity of the pump will be needed

An auxiliary cooling device

Cools engine water when the apparatus pump is engaged

The device that controls pressure surges by changing engine speed to compensate for changes in flow is a

Pressure governor

Switch from pressure to volume operation when

More than half of the rated capacity of the pump will be required

In a _____ hydrant, a small drain valve opens as the hydrant is closed

Dry - barrel

Excessive engine temperatures during pumping operations can be controlled by using the

Auxiliary cooler

The purpose of the _______ is to provide circulating feed from several mains

Grid system

Dry barrel hydrants should be opened completely because

The drain valve would be completely closed

In a water distribution grid, the _______ supplies individual hydrant and users

Distributor

_____ is corrosion or mineral deposits on the interior surface of the piping and components of a water distribution system A. Encrustation B. Sedimentation C. Filtration D. Hydrolyzation

A. Encrustation

Master streams requires a greater volume of water and are generally supplied by multiple hoselines with a Siamese or larger diameter hoseline, you must add ______ (psi) to your calculation for pressure loss

25 psi

The drafting sites that should be given preference are those

Accessible from a paved surface

In an auxiliary cooling system, heat is transferred from the engine coolant to the:

Pump discharge water

When making an intake connection at a hydrant, the intake hose should:

Have a slight curve

Using the condensed Q method, the friction loss in 500 feet of 3 inch fire hose flowing 300 gpm is

45 psi P.287

When a pumper is supplying four lines of 2 1/2’ hose, each equipped with a250 gpm fog nozzle at 100 psi, and each 300 feet long, the pump discharge pressure required is approximately

138 psi P.215, 227 ex.7.8

A fire hydrant with an orange bonnet and cap will flow ______ gpm

500-999

The water level of a reservoir is 150 feet above a fire hydrant. What is the static reading at the hydrant?

65.1 psi

The pressure remaining once water has begun flowing is _____ pressure

Residual

Natural static water supply sources include A. lakes. B. Cisterns C. Swimming pools D. Private water tanks

A. Lakes

Which best describes a wet-barrel hydrant?

Always contains water

Which best describes a DRY hydrant

Opened valve allows water to fill barrel

When pumping from a tank and attack lines are being used intermittently, the pump operator can ensure that the pump does not overheat by:

Setting the circulator valve to tank position

Available flow from hydrants is estimated by determining the percent drop between the static and _______ pressure or by the first digit method

Residual

The part of the total pressure not used to overcome friction or gravity while forcing water through fire hose, pipe, fittings, and adapters is

Residual pressure

A hydrant with the largest capacity will be one that is connected to a

Primary feeder

A fire hydrant with a GREEN bonnet and cap will flow _________ gpm.

1,000 - 1499 gpm

An apparatus equipped with a 1,000 gallon tank that is supplying two preconnected handlines, one flowing 150 gpm and another flowing 100 gpm, will supply the lines for only _____ minutes

Four

____ pressure is the difference between the pump discharge pressure and the incoming pressure from the hydrant

Net pump discharge

The operation in which each impeller of multi-stage centrifugal pump discharge into a common outlet is

Parallel pumping

The main feature of a relief valve is to

Release excessive pressure within the pump

The amount of work that a pump must do to produce a fire stream is the _____ pressure

Pump discharge

In drafting operations, pumping ability decreases when

Atmospheric pressure decreases

Prior to changing fron tank water to an extended source

Make sure all air is bled from the intake

The transition from the water tank to an external water supply:

Must be made without disrupting the fire attack

In-line relay valves allow for

Late-arriving pumpers to hook up without interrupting operations

In a relay pumping operation, which should be positioned nearest the water source?

The largest capacity pumper

A dual-pumping operation is

Placing one pumper at a hydrant and a second pumper connected intake to intake

When used in a relay pumping operation, the attack pumper

Determines the amount of water flow needed for the operation

Pump discharge pressure is equal to

NP + TPL

The residual pressure reading at the intake gauge of a pumper in a relay pumping operation should stay above ____ psi

20 psi

Relay operations are based on

Fire flow needs and distance

A mothod of relay pumping is

Constant pressure

Relay pumping always begins with the

Source/supply pumper

Relay operations should be shut down from the ______ first

Fire scene

When used in relay pumping operation, the relay pumper

Acts as the booster pump in the operation

The difference between dual pumping and tandem pumping is

Dual pumping the pumpers are connected intake to intake

When relay pumping, of the intake pressure drops below 20 psi

There is danger of a cavitation

Discharge manifolds may be used in relay operations to

Support more than one attack pumper

Fire fighting foam consist of approximately ______ percent of water

94-99.9% water

An example of polar solvent is

Acetone

When using an in-line eductor, the back pressure must not exceed ___ pressure

70 percent of the inlet

The process that causes foam concentrate to move through an in-line foam eductor and into the water stream is the ____ principle

Venturi

Which statement about foam is true?

It works by separating, cooling, or suppressing

Using an in-line eductor, the foam that is being generated is of very poor quality. Which is a common reason for the failure?

Flow through the eductor exceeds its rated capacity

The ______ is the most basic type of portable foam proportioner

In -line eductor

The foam application technique that directs the foam stream on the ground near the front edge of a burning liquid pool or spill is the

Roll-on method

Which statement must be observed when using foam?

Foam concentration is correct at the rated inlet pressure of the eductor

If the foam concentrate inlet to the educator is too high

Foam may not be inducted

The selection of a proportioner depends on

Requirements and available water pressure

When a vertical surface is near the foam application technique that can be employed is the:

Bank-down method

A limitation of Compressed Air Foam System (CAFS) is

Hose reaction can be erratic

A foam proportioner is the

Device that injects the correct amount of foam concentrate into the water

A common reason for eductor failure is

Improper cleaning and maintenance

Monitoring the water flow and controlling the speed of a positive displacement foam concentrate pump controls:

Variable flow, variable rate direct injection systems

An operational disadvantage of an around the pump foam system is

Cannot take advantage of incoming pressure

A factor to be considered when determining the rate of application for fire fighting foam is the

Type of foam concentrate used

Low-energy foam system use _______ to impart pressure on the foam solution

A fire pump

When pumping to a standpipe system, a pump operator should always allow _____ friction loss for the standpipe system

25 psi

When applying automatic sprinkler systems, pressure should be built up slowly to ______ psi at the fire department connection.

150psi

The purpose of the check valve in a fire department connection is to prevent:

Water from a sprinkler system from flowing backwhen

Positioning a pumper to supply a fire department connection, the driver must consider the:

Positioning requirements of other apparatus

Approximately ____ psi should be added to the desired engine pressure for each floor above the standpipe connection

5 psi

When using hose lines above ground level, the usual pressure calculation is to add ____ psi for each story of the building

5 psi

In a hydraulic system, the medium used to transmit force is

Hydraulic fluid

Hydraulic systems for aerial devices use relief valves to

Prevent damage due to over pressurization

The ______ valve directs hydraulic fluid from one hydraulic circuit to another

Selector

The flow of hydraulic fluid within an aerial hydraulic circuit is controlled by

Valves

Part 2 Flashcards

(107 cards)