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IFSTA Exam Prep > Ch 10. Operating Fire Pumps > Flashcards

Ch 10. Operating Fire Pumps Flashcards

1
Q

What are the steps for putting the pump into operation?

A

1.Open tank to pump valve,
2.Open discharges to hose lines being used,
3. Open the valves fill hose with water, 4. Increase the throttle,
5. Once water is flowing adjust pressure, 6. Monitor all gauges

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2
Q

When the pump is an operation, what is the responsibility of the driver/operator if a flow meter is in use?

A

Adjust the throttle until the desired flow rate is achieved

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3
Q

What steps are necessary to transition from tank water to a water supply?

A
  1. Connect the supply line into inappropriate intake.
  2. Make the connection to the intake with the gate valve closed.
  3. Open the hydrant/supply line to supply water to the closed intake valve. Open bleeder valve to allow air to escape. Open intake.
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4
Q

Operating the pump with a residual pressure below ________ psi while being supplied by other apparatus is dangerous.

A

20 psi

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5
Q

Why must water supply systems (municipal) maintain a residual pressure of at least 20 psi?

A

Contamination from sources outside the main may occur at lower pressures.
This may cause the supply hose to collapse, interrupting the supply of water.

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6
Q

What are the least desirable hydrant locations?

A

Dead and hydrants

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7
Q

Why might a fire hydrant be too close to the incident to use?

A

Creates a safety hazard for apparatus and personnel

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8
Q

What type of Lay is the most direct method of supplementing hydrant pressure or performing drafting operations?

A

Reverse lay

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9
Q

What is a potential problem with choosing to make a long forward lay with large flow demands?

A

An additional pumper maybe needed, placed at the hydrant to make use of all available pressure

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10
Q

When should the driver/operator close the tank to pump valve?

A

After transitioning to an external water supply

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11
Q

What exceptional circumstance may require a series “pressure” setting of the transfer valve?

A

Supplying the upper floors of a high-rise

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12
Q

Percentage method:

What equation is used to determine available like volumes from a hydrant?

A

(SP-RP) 100 / SP = % drop

0-10% = 3x like volume
11-15% = 2x like volume
16-20% = 1x like volume
>20% = zero like volume

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13
Q

During prolonged pumping operations, a bypass circulator may not provide sufficient cooling. What additional measures maybe used to avoid overheating?

A

Open a discharge drain valve.
Partially opened the tank fill valve or tank to pump line.
Use hose line to spray pump panel.

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14
Q

When a pumper is connected to a hydrant and is not discharging water the pressure shown on the intake gauge is the _________?

A

Static pressure

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15
Q

Like available water: First Digit Method

What is the first digit method for calculating available water using psi and GPM

A



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16
Q

During drafting operations, the amount of friction loss is____________ to the amount of water moving through the hose or appliance.

A

Proportional

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17
Q

How much vacuum capacity are most pumps capable of producing?

A

22 inches of mercury

18
Q

How much water should be above a traditional strainer in order for a pumper to approach it’s rated capacity during drafting operations?

A

At least 24 inches

19
Q

What can help lesson the chances of a whirlpool during drafting operations?

A

Floating in object above the strainer

20
Q

What type of appliance should be used when drafting from a swimming pool?

A

A low level strainer

21
Q

During drafting operations, water below 35°F or above 90°F may adversely impact the ability of the pump to ________

A

Reach capacity

22
Q

What should be done following pumping operations using non-potable water?

A

The pumps and piping should be flushed with fresh water after using non-potable water

23
Q

All fire pumps are required to pump their capacity at _______feet of lift

A

10

24
Q

To create an effective fire stream during drafting operations, a lift of no more than _________ is recommended. 

A

20 feet

25
Q

When should the pump be placed an operation during a drafting operation?

A

After all connections have been made and the apparatus is in its final position

26
Q

The transfer valve must be in parallel “volume” position when priming:

A

Two stage pumps

27
Q

The engine rpm should be kept as low as possible without causing the engine to stall when using a:

A

Vacuum type primer

28
Q

The priming action should not be halted until a steady stream of water is discharged &:

A

All air has been removed

29
Q

What is the most common cause of an air leak when priming the pump?

A

Open drain or valve

30
Q

After successfully priming the pump, the discharge valve should not be opened to quickly because:

A

Air may enter the pump causing loss of prime

31
Q

When should the throttle setting be increased before attempting to open any discharges when drafting?

A

After successfully priming the pump

32
Q

After successfully priming the pump, the driver/operator should not attempt to set the discharge pressure to the desired value until what condition is met?

A

Water is flowing and discharge gauge is stabilized

33
Q

What is most likely indicated by a gradual increase in the vacuum with no change in flow rate while the pump is operating from a draft?

A

Blockage developing

34
Q

When no specific information is available when supplying a sprinkler system via a fire department connection, the general guideline is to discharge at what psi?

A

150 psi

35
Q

When supporting an automatic sprinkler system via a fire department connection, a fire fighter should be sent to check what?

A

A fire fighter should be sent to check sprinkler control valves as soon as practical

36
Q

What type of standpipe system is likely to be usable as soon as the hose line is stretched in the valve is opened?

A

A wet standpipe

37
Q

What types of standpipe system should be supplied by a fire department pumper to supplement the systems water supply?

A

Both wet and dry systems

38
Q

What type of standpipe system is likely to experience a time delay and have trapped and compressed air released when the valve is open?

A

A dry standpipe

39
Q

What type of troubleshooting process should a driver/operator use during pumper operations to trace a problem back to its source?

A

A logical process

40
Q

 it is not possible to pour water into the pump from a draft. However it is possible to evacuate some of the air inside the pump creating a:

A

Pressure differential (partial vacuum)

41
Q

Atmosphere pressure at sea level is:

A

14.7 psi

Decreases by .5 psi for every 1000 feet of altitude gain

IFSTA Exam Prep (20 decks)

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