Pump Ops Chpt 10 Flashcards Preview

Chapa 1 pump ops > Pump Ops Chpt 10 > Flashcards

Flashcards in Pump Ops Chpt 10 Deck (48):
1

Making the pump operational referred to as "_________" begins after the apparatus is properly positioned and the parking brake has been set

Putting the pump into gear

2

Typically the least desirable hydrants are those located on "_________" that are served by smaller mains from only one direction.

Dead end mains

3

A _________ consists of stopping at the hydrant, dropping the end if one or more supply hose lines at the hydrant, and then proceeding to the fire location

Forward hose lay

4

Some deportments use a __________ to aid the process of making a forward lay. This valve allows the original supply line that was laid by the first pumper to be immediately charged using hydrant pressure

Four-hydrant valve

5

This allows the second arriving pumper, located at the hydrant, to be connected without interrupting the flow of water to the original supply line. The second pumper is then able to boost the pressure to the supply line using a second intake connection on the valve.

Four way hydrant valve

6

With the ________, hose is laid from the fire to the water source

Reverse lay

7

Load the hose with the make coupling to come out of the bed first when using hose with threaded couplings for a

Reverse lay

8

A common two pumper operation provides for an attack pumper and a war supply pumper. The _______ reports directly to the incident scene to begin initial operations using water from it's onboard water tank. The ________ lays a supply line front he attack pumper back to the water source.

First pumper (attack pumper)

Second (water supply)

9

When the pump is full of water and the pressure in the system has the stabilized with no water flowing, a reading on the master intake gauge indicates the ________ in the water supply system.

Static pressure

10

Pumps supplying a relay operation or master stream are usually used to supply large amounts of water, requiring the use of the _______ setting of the transfer valve

Parallel volume

11

When a pumper is connected to a hydrant and is not discharging water, the pressure shown on the intake gauge is ___________.

Static pressure

12

When the pumper is discharging water, the intake gauge displays the _______.

Residual pressure

13

When using the _______, the driver /operator must note the static pressure of the water system before any pump discharges are open or know the usual static pressure in the water supply system under normal circumstances.

Square-lines-method

14

However, it is possible to evacuate some of the air inside the pump creating a _______, which allows atmospheric pressure acting on the surface of the water to force the water into the fire pump.

Pressure differential (partial vacuum)

15

The amount of _______ in the intake hose depends on the diameter and the length of the hose as well as the intake strainer and any adapter use.

Friction loss

16

With the pump moving water, the vacuum reading on the master intake gauge will provide an indication of the remaining capacity if the pump. Most pumps are able to develop a vacuum capacity of approximately _______ of mercury

22 inches

17

In theory,________ can be described as water being discharged faster than it is coming into the pump. This condition occurs when air cavities are created in the pump or bubbles pass through the pump.

Cavitation

18

In order for a pumper to approach it's rated capacity using a traditional strainer, there must be at least _______ of water over the strainer

24 inches

19

These strainers are designed to sit directly on the bottom of a tank or pool and allow water to be effectively drafted down to a depth of approximately 2inches

2 inches low level strainers

20

Each time _______ is pumped through the apparatus, the pump and piping should be thoroughly flushed with fresh water soon afterwards.

Non potable water

21

All fire pumps meeting NFPA and underwriters laboratories inc. requirements are rated to pump their capacity at ______ of lift.

10 feet

22

A pumper. In good working order can lift water a maximum of _____.

25 feet

23

To create an effective fire stream, a lift no greater than ______ is recommended. Working with this lift, the pump operates at about 60 percent of its rated capacity.

20 feet

24

When the pump has been made operational, priming the pump will begin the operation. For two stage pumps, the transfer valve must be in the ___________. A pump in series pressure position may trap air that will need to be removed.

Parallel volume position

25

Most priming pumps are intended to work most effectively when the engine is set at rate between ______ and _____.

1000 and 1200 rpm

26

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

Blockage

27

The installation of all occupancies with ______ should be identified in preincedent planning.

Automatic sprinkler systems

28

If a sprinkler system is to be supplied at the FDC, the driver/operator should slowly develop the amount of pressure required to supply the system, after the need to supply the system has been confirmed. Multi stage pumps should be operated in ________.

Parallel volume position

29

Allow for quicker access to water supply for attack hose lines in multi floor or single buildings with large floor areas.

Standpipe systems

30

Add approximately _____ for each floor above the fire department connection that will have operating fire streams

5 psi

31

When a standpipe system is known to be equipped with _____, the elevation pressure used must be based on the total height of the standpipe or zone being used.

Pressure reducing valves

32

Driver operators should maintain a residual pressure of at least ____ on their master intake gauges at all times during pumping operations.

20 psi

32

The ____ is the most direct method of supplementing hydrant pressure or performing drafting operations

Reverse lay

32

To use the percentage method, first calculate the drop in pressure as a

Percentage

33

The _____ is a quick and easy way to calculate available water using psi and gpm

First digit method

34

The ability to overcome losses in pressure is limited to atmospheric pressure at sea level 14.7psi. The inches of mercury measurement is used in drafting since the changes in pressure are so minute. This pressure decreases approximately _____ for each 1000 ft of altitude gain.

0.5 psi

35

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

Drafting operations

36

The first consideration in establishing a drafting operation is

Site selection

37

If the draft is being established to supply water tenders for a shuttle operation, there may be several options. A site may be selected by:

Amount of water
Type or quality of water
Accessibility of water

38

The most important factor in choosing the draft site is the

Amount of water available

39

When using a portable tank or swimming pool for drafting operations, a _______ is the appliance of choice

Low level strainer

40

Accessibility to a water source is an important factor in selecting a

Drafting site

41

If the apparatus features a ______, the engine rpm should be kept as low as possible without causing the engine to stall.

Vacuum type primer

42

The most common inability to prime is an ______ that prevents the primer from developing enough vacuum to successfully draft water

Air leak

43

The most common cause for an air leak is an

Open drain

44

The most common place for blockage to occur is in the

Strainer

45

Several types of problems may occur during drafting operations. They all fall into the following general categories

Air leak on the intake side of the pump
Whirlpool allowing air to enter the pump
Air leakage due to defective pump packing

46

Many manual standpipe systems are designed to be pumped at a pressure of ____ at the FDC

150 psi