Chapter 10 Operating Fire Pumps Flashcards Preview

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Flashcards in Chapter 10 Operating Fire Pumps Deck (55):
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:

Pump
Three

Pg 335

2

Making the fire pump operational begins after:

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

Pg 336

3

The initial water source is often the:

Apparatus water tank

Pg 337

4

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

Pump panel

Pg 337

5

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

Depleting the onboard tank

Pg 338

6

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

A fire hydrant or a supply hose from another pumper

Pg 339

7

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

20

Pg 340

8

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

Water supply system

Pg 340

9

Larger water mains have less_________ while smaller mains will have more

Sediment

Pg 340

10

A forward lay consists of:

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

Pg 341

11

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

Hydrant to make use of all available pressure

Pg 341

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

2 1/2 or 3"

Pg 344

13

With a reverse lay hose is laid from:

The fire to the hydrant

Pg 344

14

The reverse lay is the most direct method of:

Supplementing hydrant pressure or performing drafting operations

Pg 344

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:

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

Pg 345

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:

Static pressure in the water supply system
Pg 346

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

Parallel or volume setting

Pg 346

18

A hose must be filled before______ can be established

Pressure

Pg 346

19

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

Increased further due to risk of cavitation

Pg 346

20

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

Static pressure

Pg 347

21

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

Residual pressure

Pg 347

22

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

Water hammer and pressure sures on water system

Pg 351

23

Cavitation can be described as:

Water being discharged faster than it is coming into the pump

Pg 354

24

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

Cavitation occurs

Pg 354

25

The surest indication of cavitation may be:

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

Pg 354

26

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

Drafting operations

Pg 354

27

The first consideration in establishing a drafting operation is:

Site selection

Pg 354

28

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

Amount of water available

Pg 355

29

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

24"

Pg 355

30

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

Float freely unconstrained by the rigidity of the intake hose:

Pg 355

31

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

Low lever strainer

Pg 356

32

Each time nonpotable water is pumped through the apparatus:

The pump and piping should be thoroughly flushed with fresh water

Pg 356

33

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

10'

Pg 357

34

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

20

Pg 357

35

Other important variable to consider during draft site selection include:

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

Pg 357

36

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

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

37

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

Tie a rope to the end of the strainer

Pg 358

38

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

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

Pg 358

39

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

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

Pg 358

40

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

Parallel (volume) position

Pg 358

41

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

1,000 and 1,200 rpm

Pg 359

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

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

43

The entire priming action typically requires_______ to________ seconds.

10-15

Pg 359

44

The most common inability to prime is a :

Air leak that prevents
Pg 359

45

The most common cause of an air leak is:

An open drain or valve

Pg 359

46

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

Water is flowing and the gauge is stabilized

Pg 360

47

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

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

Pg 360

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:

A blockage is developing

Pg 361

49

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

Strainer

Pg 361

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:

Strainer located at the intake pump

Pg 361

51

Sprinkler systems are designed to support the flow of a:

Specified number of fire sprinklers based on the hazard being protected

Pg 362

52

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

The interior crews

Pg 363

53

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

Parallel or volume

Pg 363

54

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

150
Pg 363

55

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

185