Pump Ops

Atmospheric pressure decreases .5 psi per ____ per ft of evevation

Apparatus with front or rear intakes should be angled towards the curb ___ deegrees or less

Centrifugal pumps have no positive blockage between the intake and discharge side.

The Pressure governor functions by controlling engine speed when it senses excess pressure.

Older systems do not exceed ___ psi engine pressure when supplying the FDC

Rise pressure in a standpipe/sprinkler system in ___ psi increments

Sprinkler/Standpipe systems are tested at

Standpipes and sprinklers don't exceed ___ psi engine pressure when supplying the FDC

Priming a pump for ___ seconds max for 1250 gpm pumps

Priming a pump for ___ seconds max for 1500 gpm pumps

One gallon of water weighs

One gallon of water contains ___ cubic inches

One cubic foot of water weighs

One cubic foot contains ___ gallons of water

One cubic foot is ___ cubic inches

A colum of water one foot high exerts a pressure of ___ at its base

One inch of mecury is equal to ___ inches of water

Relay pumping evolutions should be shut down at the scene pumper frst

HG is the symbol for what

Dependable lift is ___ feet

Theoretical lift is ___ feet

Pumpers should flow 100 % capacity as ___ psi

Pumpers should flow 70 % capacity at ___ psi

Pumpers should flow 50 % capacity at ___ psi

Pumpers capacities are set at draft with ___ ft of lift through ft of hard suction

Evevating water devices typically range in height from

Industrial pumpers are built according to NFPA ___ and ___

What NFPA # is the standard for automotive fire appratus

Most appratus or equipment failures can be prevented by performing routine maintinance checks on a regular basis

Exercising the volume the volume series control lever is NOT part of the daily apparatus inspection

Apparatus with tanks of MORE than ___ gal must have 2 inch tank fill line

Appratus with water tanks off 1000 gallons or LESS must have a tank fill line of at least ___ inch

PTO drives limit pump capacity to ___ gpm

Minimum pump capacity for pump design is ___ gpm

A rear mount pump is LESS safe for the driver operator

Appratus protecting structures during wild land fires should be parked OFF the roadway.

New Apparatus must be able to come to a complete stop from a speed of 20 MPH in a distance of ___ feet

The first element in learning to drive safely is a safety concious attitude.

The pressure governor functions by controlling engine speed when it senses excess pressure

Centrifugal pumps have no positive blockage between the intake and discharge sides

When operating from a hydrant with 2 1/2 or 3 " supply lines should be no longer than

Responding apparatus must stop for a loading or unloading school bus.

Apparatus with a large compliment of ground ladders but no real areal device is called

Inverters generally provide ___ watts

Vehicle mounted generators provide up to ___ watts

A midi-pumper chassis weighs ___ pounds

Pumpers with a capacity of 500gpm or less should be able to flow ___ gpm from a booster hose.

The best location for command is on the ___ of the building

A 750gpm pumper must have at least 2 ___ inch discharges

Steering wheel play should be no more that ___ degrees

The most common type of pump is the

Driver/Operator responsibilities are dictated by department ___ & ___

The section of the pump which gradually increases in cross-sectional dimension as it nears the pump discharge is

Back pressure due to elevation

If an exposed building has a sprinkler system the FD should connect to and charge the system

Portable generators generally supply ___ watts

Air horns will not work if the air pressure drops below ___ psi

The most common type of valve is the

If the main valve for a sprinkler system is shut off water will still reach the sprinkler heads

There is a one-way check valve to keep contaminated water out of the main water system

If firefighters connect to a standpipe they should remove pressure reducing valves

There is no shut off valve between the FDC and the standpipe connection

Inside/out method-buildings 6 or more stories, position the ___ ___ next to the building

Five stories or less position the ___ ___ next to the building

Hose should be pumped at pressures that do not exceed ___ % of the annual servce test

Intake hose for hydrant connection is typically ___-___ feet in length

Never connect hard suction hose to a hydrant

Firefighters should never be allowed to ride tailboard

One 1000gpm pumper should supply the FDC for every ___ sprinkler heads flowing

For fra

For drafting there should be a minimum of ___ inches of water around the strainer

First 6 months wash vehicles frequently with ___ water only

4 or 5 inch is the most common sizes of ___ supply line

Pumps are hydrostatically tested at ___ psi for ___ mintues

Pumps less than 750gpm capacity undergo same certification test EXCEPT FOR THE PUMPING ENGINE OVERLOAD TEST

Pumpers should be given a service test at least ___

NFPA does not require foam system testing annually but NFPA ___ requires operators to know how to perform test

NFPA 1002 is the

Emergency vehicles traveling the same route shouldn stay ___ -___ feet apart

Nozzle pressue for smooth bore hand line is

Nozzle pressure for smooth bore master stream is

What psi are fog nozzles operated at

Air tempature should not be above ___ degrees F during apparatus testing

1 1/2 inch hose 50 feet long full of water weighs how many pounds

There is an additional ___ % friction loss due to sinuosity or zigzagging of hose

Most accidents occur while backng

For non-emergency operation the engine should warm-up for how many minutes

Parallel volume=

Series=

Water flows through hose lines at how many feet per minute

RPM's when drafting is ___ to ___

When leaving apparatus running you should set the RPM's between ___ & ___

Daily engine start up just to check apparatus is not reccommended

Most common size water tank on a class A pumper is

Given the same size hose, if the tip size is reduced and pressure is increased but flow stays the same what happens to friction loss?

A pumper should have one 2 1/2 inch discharge for every ___gpm of capacity

Most accidents involving emergency apparatus happens at intersections

Oil Gage fluttering is a indication of low oil levels. Stop and check oil level

Intake gauge shows 15mmg, how much lift do you have?

Drop engine pressure to ___ psi before operating chane over valve

Air leak is the most likely the cause of not being able to draft. An intake is the most likely location of the leak.

Generally 350 gpm is the maximum amount of water that can safely flow through a handline nozzle.

What is critical velocity for a 2 1/2 hose

What is critical velocity for a 3 inch hose

Low engine temperature is bad because cold oil provides poor lubrication.

Centrifugal pumps build up pressure in the volute

Gated intake ball-valves are located to the side and slightly below the steamer intake.

According to NFPA 1901 class A pumpers must have what 3 items

Discharge guages are calibrated to what psi

The pressure remaining on a system when water is flowing

The pressure on a system when water is not flowing

The foward velocity pressure at a discharge opening when water is flowing

If a nozzle is shut down quickly where does the water hammer go

What 3 ways is water pressure created

What kind of pressure is created by a pump

A pressure governor works by adjusting engine RPM,s based on changes on the incoming pressure

If an engine is overheating while pumping the operator should open the auxilary engine cooler

What kind of pumping is intake to intake and is used to take advantage of excess hydrant flow

What kind of pumping is discharge to intake

What type of staging is used on incidents involving 2 or more units providing like functions

What type of staging is used on all multi-alarm and mutual aid calls

A diesel engine loses horsepower when temps are over what degree

When returning to the fire station the driver should allow engine temp to stablize before shutting the engine off

During drafting operations if your discharge pressure drops below ___ psi you should pause for a moment until pressure comes back up to avoid losing prime.

A vacum test is performed to ensure there is no air leaks in the pump

Pressure is simply forced measured in

HEad pressure is another name for back pressure created by elevation.

With the same size hose friction loss varies with the square of the velocity of the flow

With centrifugal pumps the discharge can be shut down for short periods of time without damaging the impellers from overheating

When placing the PTO into gear you should put the trunk transmission into neutral or park.

Where the flow velocity is increased to a point where there is turbulence in the entire stream and flow can't be ncreased anymore.

Riding tailboard should not be allowed

Positive displacment pumps CAN pump air

The 2 1/2 gated intake is usually located to the side and slightly below the steamer intake.

A tank fill line should be provided from the discharge side of the pump. This allows the tank to be filled without making any additional connections during drafting operations.

What is the most common reason for loss of prime

Discharging more water than you are taking in

noise in the pump, no ncrease in pressure when RPM's are increased, pressure gauges fluctuating, and hose stream fluctuating are all signs of what

An adapter called an INCREASER has female threads on the smaller end and male threads on the larger end

Relay pumpinng operations are determined by hose size, length of the hose lay, pumper capacity, and amount of water needed.

Start up oil pressure may be higher than normal operating oil pressure

Sudden engine temp ncrease is a sign of trouble, shut down immediately and check the problem

Fluids have no set shape and cannot be pulled or lifted but must be pushed by having pressure applied

The pressure found on a water distribution system during normal consuption demands

What are the 3 main factors that influence a centrifugal pump

Fluids have no established shape, They will conform to the shape of the vessel in which they are contained. They have very little adhesive quality and cannot be pulled or lifted. They must be pushed by having pressure applied and confined in some manner to direct the blow.

An increaser is used to attach a larger hose line to a smaller one. It has a female threads on the smaller side and male threads on the larger side.

How many feet is dependable lift

Theoretical lift is how many feet

Parallel operation is the same as volume or capacity

Relief valves eliminate excess pressure by allowing the pressure to bypass to the intake side of the pump.

Pressure governors eliminate excessive pressure by controlling engine speed (RPM's)

Pressure operation is the same as series

Triple-combination pumpers have what

A volute is a spiral, divergent chamber of a centrifugal pump in which the velocity energy given to water by the impeller bladders is converted to pressure.

Qualifications for fire appratus driver/operators can be found in NFPA 1002

The first element in learning to drive safely is to develop the proper attitude

Riding the tailboard is not safe and must be discontinued

Whenever possible, the driver/operator should avoid backing up. If needed, have one person on each side of the backing apparatus

Intersections are the most likely palace for an accident involving an emergency vehicle

The transfer valve on a two stage pump should be operated at a net pressure greater that how many psi

Additional impellers used in series are for extra high pressure

Major characteristics of centrifugal pumps include all of the fallowing
a. They will not prime themselves
b. The impeller turns
c. There is no positive blockage through the pump

The pressure gauge mounted on a pumper must be calibrated to measure 600 psi unless the pumper is equipped to supply high pressure fog streams. Compound gauges are calibrated from 0 to 30 inches of vacum on the negative side.

When pumping from a hydrant or in a relay, it is not desirable to reduce the incoming pressure below what psi

Indications of pump cavitation include all of the fallowing
1. Hose streams and pressure gauges fluctuating
2. Popping or sputtering sound as water leaves the nozzle
3. Gravel sounds comng from the pump
4. Lack of reaction on the pressure gauge to changes in the setting of the throttle.

The sequence of operations for putting a fire pump into gear and getting water into the pump will vary with
A. Local dept policies
B. Design of the apparatus
C. Type of priming devices

For stationary pumping of PTO pumps, Place the transmission in neutral

During drafting operations in order for a pumper to approach its total rated capacity, there must be a minimum of how many inches of water over the strainer.

All class A pumpers are rated to pump their capacity at how many feet of lift

Most pumps prime well between ___ & ___

Atmospheric pressure at sea level is

One inch of mercury equals ___psi or ___ feet of water

Head pressure is the same as back pressure.

How many psi for solid stream hand line

Nozzle pressure on a solid stream master stream is how many psi

Master streams are considered to be all streams with a gallon flow greater that ___ gpm

Friction loss is that part of total pressure that is used to overcome friction (or resistance) while forcing water through pipes, fitting, adapters, and fire hoses.

Ordinary sinuosity produces up to ___% friction loss

When the same size hose is used, the friction loss will vary approximately with the square of the velocity of the flow.

For a given velocity of flow, the friction loss per hose is approximately the same no matter what the pressure on the water may be.

When applying pressure on the water in a hose, there is a limit to the velocity or speed at which the stream can travel. If the velocity is increased beyond these limits, the friction becomes so great that the entire stream is agitated be restistance. The agitation causes a point of turbulence called critical velocity.

When pumping in relay, supply 20 psi residual to the intake of the next engine plus friction loss.

Standpipe systems may be wet or dry

In most standpipe systems "hose lines" are usually unlined linen hose. Firefighters should disconnect these lines and remove pressure reducing valves if they are present and use their own hose lines or nozzles.

Standpipe systems are rarely built to withstand more than 225 psi

Fire boats are most suited for pumping through large master stream devices and providing additional water to on shore operations

A closed, curved tube that when pressure is applied to open end of tube it will tend to straighten inself.

2 types of guages
A. Pressure gauge-read only positive pressures
B. Compound gauge-read both positive and negative pressures due to having bourdon tubes.

Positive displacment pumps can pump air unlike centrifugal pumps. For this reason, positive displacment pumps are used for priming pumps and centrifugal pumps are used as main fire pumps

What are 2 types of positive pumps

Piston pumps are susceptible to wear, as the pistion wears, water can escape to the intake side of the pump therefore reducing pump capacity

Rotary vane pumps are constructed with movable elements that automatically compensate for wear and maintain a tighter fit with closer clearance as the pump is used. Rotor is mounted off center in housing. Distance between rotor and housing is greater on intake side than discharge size.

Main parts of a centrifugal pump
IMPELLER
Eye
Vanes
Hub
Shroud

CASING
Volute
Stripping edge
Discharge

Answer questions about making the pump operational
1. Putting the pump into gear
2. Involves parking the apparatus, putting the brake and chockes, and putting the PTO in the right position before one can pump the truck.

Engage the disengage a power take off (PTO) or front mount pump during pump and roll operations

Manual engage
1. full stop
2. push in the clutch
3. Place transmiission into neutral
4. Operate the push/pull PTO
5. Place drive transmisson into gear
6. Release parking brake
7. Engage clutch

Automatic engage
1. Full stop
2. Drive transmission into neutral
3. Operate PTO
4. Place into drive
5. Release brake