Chapter 13 Relay Pumping Operations Flashcards Preview

IFSTA Pumping Apparatus Driver/Operator > Chapter 13 Relay Pumping Operations > Flashcards

Flashcards in Chapter 13 Relay Pumping Operations Deck (24)
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1
Q

What is the maximum distance relay method?

A

A method that involves flowing a predetermined volume of water for the maximum distance that it can be pumped through a particular hose lay

2
Q

All fire department pumpers are rated to flow their maximum volume at:

A

150 psi (1 000 kPa).

3
Q

All fire department pumpers are rated to flow 70 percent of their maximum volume at:

A

200 psi (1 350 kPa).

4
Q

All fire department pumpers are rated to flow 50 percent of their maximum volume at:

A

250 psi (1 700 kPa).

5
Q

A relay pumping operation always begins with the:

A

source pumper.

6
Q

As a rule, ___ should be used at the source.

A

the largest capacity pumper

7
Q

If the relay is being supplied from draft, the ___ will have to develop a higher net pump discharge pressure than the other pumpers in the relay.

A

source pumper.

8
Q

Failure to keep water moving through the pump could result in ___, thus delaying the operation.

A

loss of prime

9
Q

The relay pumper should be waiting for water with the dump line or discharge ___ and the pump out of gear.

A

open

10
Q

If the waiting period for receiving water from the source pumper or another relay pumper is only going to be a few minutes, the pump on the waiting pumper may be ___ before receiving the water.

A

engaged

11
Q

Sometimes the relay can be started, or the hoselines filled, with water from the:

A

apparatus water tank.

12
Q

It is most desirable to maintain an intake pressure of:

A

20 to 30 psi (150 kPa to 200 kPa).

13
Q

If the relay pumper is receiving an intake pressure greater than ___, the valve to the dump line on the relay pumper must be adjusted to limit residual pressure to this maximum.

A

50 psi (350 kPa)

14
Q

When water reaches the attack pumper, the operator should:

A

bleed air from the line.

15
Q

Once the relay is in operation and the water is moving, all pump operators set their ___ to an appropriate level.

A

automatic pressure control devices

16
Q

If equipped with the newest and most sensitive pressure governors, the attack pumper should be set in the ___ mode while all others in the relay should be set in the ___ mode.

A

pressure; RPM

17
Q

If the intake relief valve is readily adjustable, it should be set to discharge at ___ above the static pressure of the water system it is attached to or above discharge pressure of the previous pumper in the relay.

A

10 psi (70 kPa)

18
Q

At no time should the relief valve be set for a higher amount than the safe working pressure of the:

A

hose.

19
Q

If the attack pumper is equipped with a readily adjustable intake relief valve, it should be set between ___ to establish a stable operating condition.

A

50 to 75 psi (350 kPa to 525 kPa)

20
Q

Small variations in pressure are not significant and as long as the intake relay pumper does not drop below 10 psi (70 kPa) or increase above ___, no attempt should be made to maintain exact pressures.

A

100 psi (700 kPa)

21
Q

Radios must be used ___ so as not to hamper fire fighting activities and efforts to establish water supply.

A

cautiously

22
Q

When pumpers are within sight of each other:

A

hand signals can be used.

23
Q

Relay operations should be shut down first from the:

A

fire scene.

24
Q

Starting with the ___, each operator should slowly decrease the throttle, open the dump line, and take the pump out of gear.

A

attack pumper