Chapter 10 Operating Fire Pumps

Question 1

The driver must first make the_________ operational and then prepare to use at least one of__________ sources of water to supply the pumping operation:

Answer 1

Pump
Three

Pg 335

Question 2

Making the fire pump operational begins after:

Answer 2

The apparatus is properly positioned and the parking brake has been set.

Pg 336

Question 3

The initial water source is often the:

Answer 3

Apparatus water tank

Pg 337

Question 4

Upon exiting the cab and chocking the apparatus wheels, the driver then proceeds to the:

Answer 4

Pump panel

Pg 337

Question 5

It is necessary to transition to an external water supply before:

Answer 5

Depleting the onboard tank

Pg 338

Question 6

The two basic pressurized water supply sources that a driver will encounter are:

Answer 6

A fire hydrant or a supply hose from another pumper

Pg 339

Question 7

Drivers should maintain a residual pressure of at least_____ psi on their master intake gauge at all times during pumping operations:

Answer 7

20

Pg 340

Question 8

In order to make and informed hydrant selection a thorough knowledge of__________ is necessary

Answer 8

Water supply system

Pg 340

Question 9

Larger water mains have less_________ while smaller mains will have more

Answer 9

Sediment

Pg 340

Question 10

A forward lay consists of:

Answer 10

Stopping at the hydrant, dropping the end of one or more supply hoselines at the hydrant and proceeding to the fire location

Pg 341

Question 11

In a long lay with large flow demands, a pumper may need to be places at the:

Answer 11

Hydrant to make use of all available pressure

Pg 341

Question 12

Keep the distance as short as possible to avoid excess friction loss when using_______ or _________ hoselines to supply a pumper directly from a hydrant pressure

Answer 12

2 1/2 or 3”

Pg 344

Question 13

With a reverse lay hose is laid from:

Answer 13

The fire to the hydrant

Pg 344

Question 14

The reverse lay is the most direct method of:

Answer 14

Supplementing hydrant pressure or performing drafting operations

Pg 344

Question 15

Regardless of whether a particular apparatus is quipped with a check valve in the tank to pump line or a shutoff valve on the intake, the driver should:

Answer 15

Close the tank to pump valve after transitioning to an external water supply

Pg 345

Question 16

When the pump is full of water and the pressure in the system has stabilized with no water flowing , a reading of the pressure o the master intake gauge indicates the:

Answer 16

Static pressure in the water supply system

Pg 346

Question 17

Pumps supplying a relay operation of master stream are usually used to supply large amounts of water requiring the use of a ___________ setting of the pump

Answer 17

Parallel or volume setting

Pg 346

Question 18

A hose must be filled before______ can be established

Answer 18

Pressure

Pg 346

Question 19

If the master intake gauge reaches 20 psi the throttle must not be:

Answer 19

Increased further due to risk of cavitation

Pg 346

Question 20

When a pumper is hooked to a hydrant and is not discharging water, the pressure shown on the intake gauge is:

Answer 20

Static pressure

Pg 347

Question 21

When the pumper is discharging water, the intake gauge displays:

Answer 21

Residual pressure

Pg 347

Question 22

All changes in flow should be made slowly and smoothly to avoid:

Answer 22

Water hammer and pressure sures on water system

Pg 351

Question 23

Cavitation can be described as:

Answer 23

Water being discharged faster than it is coming into the pump

Pg 354

Question 24

The temp of the water, the height of the lift, and the amount of water being discharged affect the point at which:

Answer 24

Cavitation occurs

Pg 354

Question 25

The surest indication of cavitation may be:

Answer 25

A lack of reaction on the pressure gauge to increases in throttle Pg 354

Question 26

Although cavitation can occur when operating from a hydrant system, it often occurs during:

Answer 26

Drafting operations Pg 354

Question 27

The first consideration in establishing a drafting operation is:

Answer 27

Site selection Pg 354

Question 28

The most important factor in choosing the draft site is the:

Answer 28

Amount of water available Pg 355

Question 29

In order for a pumper to approach its rated capacity using a traditional strainer there must be _______ inches of water over the strainer:

Answer 29

24" Pg 355

Question 30

In order for a floating strainer to work properly it must:

Answer 30

Float freely unconstrained by the rigidity of the intake hose: Pg 355

Question 31

When using a portable tank of swimming pool for drafting operations a____________is the appliance of choice:

Answer 31

Low lever strainer Pg 356

Question 32

Each time nonpotable water is pumped through the apparatus:

Answer 32

The pump and piping should be thoroughly flushed with fresh water Pg 356

Question 33

All fire pumps meeting nfpa and UL requirements are rated to pump their capacity at ________ of lift

Answer 33

10' Pg 357

Question 34

The create an effective fire stream a lift of no more than_______ feet is recommende

Answer 34

20 Pg 357

Question 35

Other important variable to consider during draft site selection include:

Answer 35

The stability of the ground surface, the convenience of connecting hoselines, and the safety of the driver Pg 357

Question 36

If the area around the final drafting spot is limited. You should:

Answer 36

Stop the vehicle, connect the intake hose and strainer, then slowly drive into place while firefighters carry the hose and strainer and place it in the desired location Pg 358

Question 37

To aid in handling of hose and proper strainer position you should:

Answer 37

Tie a rope to the end of the strainer Pg 358

Question 38

It is usually easier to connect the hose to the intake fitting by first:

Answer 38

Putting the strainer into the water then placing the apparatus into position Pg 358

Question 39

If the bottom slopes steeply from the waters edge place a:

Answer 39

Roof ladder in the water and lay the intake hose on it Pg 358

Question 40

To prime a two stage pump the transfer valve must be in the:

Answer 40

Parallel (volume) position Pg 358

Question 41

Most priming pumps are intended to work most effectively when the engine is set at a rate between:

Answer 41

1,000 and 1,200 rpm Pg 359

Question 42

As the air is evacuated from the pump the master intake gauge will register a vacuum reading. This reading should equal _______ inch of mercury for 1 foot of lift required

Answer 42

1" for three feet of lift it will read 3" Pg 359

Question 43

The entire priming action typically requires_______ to________ seconds.

Answer 43

10-15 Pg 359

Question 44

The most common inability to prime is a :

Answer 44

Air leak that prevents | Pg 359

Question 45

The most common cause of an air leak is:

Answer 45

An open drain or valve Pg 359

Question 46

The driver should not attempt to set the discharge pressure to the desired value until:

Answer 46

Water is flowing and the gauge is stabilized Pg 360

Question 47

Using tank water to establish prime can only be successful if:

Answer 47

An adequate seal is established when the tank to pump valve is closed Pg 360

Question 48

While the pump is operating a gradual increase in the vacuum may be noted with no change in the flow rate. This is an indication that:

Answer 48

A blockage is developing Pg 361

Question 49

The most common place for a blockage to occur is in the:

Answer 49

Strainer Pg 361

Question 50

Aside from the strainer a blockage can occur in the_______. If this happens pumping operations must be stopped while the intake hose is removed and the blockage cleared:

Answer 50

Strainer located at the intake pump Pg 361

Question 51

Sprinkler systems are designed to support the flow of a:

Answer 51

Specified number of fire sprinklers based on the hazard being protected Pg 362

Question 52

When interior attack crews are operating hoselines from a combination sprinkler/standpipe system with sprinklers flowing set the pressure for:

Answer 52

The interior crews Pg 363

Question 53

When supplying a sprinkler system multistage pumps should be set in_______ mode

Answer 53

Parallel or volume Pg 363

Question 54

If not specific info is avail the general guideline is to discharge_______ psi into the fdc

Answer 54

150 | Pg 363

Question 55

Do not use pump discharge pressures in excess of ______ psi unless the standpipe system, hose, and appliances are designed for it

Answer 55

185