Chapter 12 Flashcards
(46 cards)
1.Which pumper takes water from a hydrant or static source at the beginning of a relay operation? (426)
A.Relay pumper
B.Primary pumper
C.Fire attack pumper
D.Water supply pumper
D.Water supply pumper
2.In a relay operation, which should be the pumper with the largest pumping capacity? (426)
A.Relay pumper
B.Primary pumper
C.Fire attack pumper
D.Water supply pumper
D.Water supply pumper
3.In a relay operation, which pumper receives water from the source pumper, raises the pressure, and supplies water to the next apparatus? (427)
A.Relay pumper
B.Primary pumper
C.Secondary pumper
D.Water supply pumper
A.Relay pumper
4.Which pumper may be of smaller capacity due to its ability to use acquired energy of previous pumpers in the relay? (427)
A.Relay pumper
B.Primary pumper
C.Secondary pumper
D.Fire attack pumper
A.Relay pumper
5.Which pumper is responsible for supplying attack lines and appliances required for fire suppression? (427)
A.Relay pumper
B.Primary pumper
C.Secondary pumper
D.Fire attack pumper
D.Fire attack pumper
6.Which is MOST likely a factor in determining the need for relay pumping operations? (427)
A.Number of personnel available at the scene
B.Likelihood of nearby exposures catching fire
C.Whether or not fire is a multiple-alarm incident
D.Distance between incident scene and the water source
D.Distance between incident scene and the water source
7.The distance of the relay is an important operational consideration because the longer the hose lay, the: (428)
A.more friction loss will be encountered.
B.larger the maximum lift will be achieved.
C.more the diameter of hose must be decreased.
D.greater the total volume of water that will be required.
A.more friction loss will be encountered.
8.Which can be done if the amount of flow through a relay operation needs to be increased? (428)
A.Transition to a different water source
B.Decrease the time spent on relay operations
C.Increase the time spent on relay operations
D.Increase the diameter of the supply hose or the number of hoselines
D.Increase the diameter of the supply hose or the number of hoselines
9.Centrifugal pumps are rated to pump at their maximum volume capacity at _____ at draft. (428)
A.100 psi (700 kPa)
B.150 psi (1 050 kPa)
C.250 psi (1 750 kPa)
D.275 psi (1 925 kPa)
B.150 psi (1 050 kPa)
10.When pumpers in the relay operation increase their pump discharge pressure,: (428)
A.volume will always be increased.
B.personnel may be unable to keep up with volume.
C.increased stress on the pump may cause volume to decrease.
D.a point will be reached where increased pressure will not increase volume.
D.a point will be reached where increased pressure will not increase volume.
11.In relay operations, elevation pressure: (428)
A.is less than simple friction loss when water must be pumped uphill.
Bis greater than simple friction loss if water must be pumped downhill.
C.is affected both by the amount of water being moved and by the topography.
D.is not affected by the amount of water being moved, only by the topography.
A.is less than simple friction loss when water must be pumped uphill.
12.Placing additional pumpers in the system will increase flow during a relay operation because it shortens the length of hose each pumper must supply and allows pumpers to: (428)
A.periodically take breaks and check all equipment.
B.vary the amount of water provided by each pumper.
C.operate at higher pressures and maximum flows within the relay operation.
D.operate at lower pressures and maximum flows within the relay operation.
D.operate at lower pressures and maximum flows within the relay operation.
13.When relaying long distances: (432)
A.equalize spacing between pumpers as much as possible.
B.spacing between pumpers should be determined by most convenient location.
C.pumpers in the front of the relay should be further apart than pumpers toward the end of the relay.
D.pumpers in the front of the relay should be closer together than pumpers toward the end of the relay.
A.equalize spacing between pumpers as much as possible.
14.Putting a relay into operation begins with: (432)
A.the largest capacity pumper working from the water source.
B.the smallest capacity pumper working from the water source.
C.a pumper with average capacity working from the water source.
D.the pumper with the most experienced crew working from the water source.
A.the largest capacity pumper working from the water source.
15.When drafting from a static source, the source pumper: (432)
A.must have the same pump discharge pressure as other pumpers in the relay operation.
B.may need to develop a higher pump discharge pressure than other pumpers in the relay operation.
C.may need to develop a lower pump discharge pressure than other pumpers in the relay operation.
D.must vary pump discharge pressure to within a range used by other pumpers in the relay operation.
B.may need to develop a higher pump discharge pressure than other pumpers in the relay operation.
16.The overall capacity of the relay system is determined by the: (432)
A.average of all pumps and hose used in the relay.
B.largest pump and the largest diameter of hose used in the relay.
C.largest pump and the smallest diameter of hose used in the relay.
D.smallest pump and the smallest diameter of hose used in the relay.
D.smallest pump and the smallest diameter of hose used in the relay.
17.Loss of prime or overheating of the pump is MOST likely the result of: (432)
A.extended relay operations.
B.not taking periodic breaks during relay operations.
C.moving too much water through the pump when using a static water supply.
D.failure to keep water moving through the pump when using a static water supply.
D.failure to keep water moving through the pump when using a static water supply.
18.When the source and relay pumpers are ready, the discharge supplying the hoseline on the source pumper is: (433)
A.closed and the valve on the dump line is closed.
B.opened and the valve on the dump line is opened.
C.closed while the valve on the dump line is opened.
D.opened while the valve on the dump line is closed.
D.opened while the valve on the dump line is closed.
19.As a relay pumper, it is advisable for driver/operators to maintain an intake pressure of: (433)
A.10 to 20 psi (70 to 140 kPa).
B.20 to 30 psi (140 to 210 kPa).
C.30 to 40 psi (210 to 280 kPa).
D.40 to 50 psi (280 to 350 kPa).
B.20 to 30 psi (140 to 210 kPa).
20.Apparatus equipped with pressure governors should be set in: (433)
A.rpm mode when acting as the attack pumper and while working as a relay pumper.
B.pressure mode when acting as the attack pumper and while working as a relay pumper.
C.rpm mode when acting as the attack pumper and pressure mode while working as a relay pumper.
D.pressure mode when acting as the attack pumper and rpm mode while working as a relay pumper.
D.pressure mode when acting as the attack pumper and rpm mode while working as a relay pumper.
21.When relay pumpers are equipped with an adjustable intake relief valve, one guideline is that it should be set to: (434)
A.the same discharge pressure as the previous pumper in the relay.
B.10 psi (70 kPa) above the discharge pressure of the previous pumper in the relay.
C.10 psi (70 kPa) below the discharge pressure of the previous pumper in the relay.
D.within ten percent of the discharge pressure of the previous pumper in the relay.
B.10 psi (70 kPa) above the discharge pressure of the previous pumper in the relay.
22.Attack pumpers equipped with an adjustable intake relief valve should be set: (434)
A.at exactly 50 psi (350 kPa) to establish a stable operating condition.
B.at exactly 75 psi (525 kPa) to establish a stable operating condition.
C.between 50 and 75 psi (350 and 525 kPa) to establish a stable operating condition.
D.between 75 and 100 psi (525 and 700 kPa) to establish a stable operating condition.
C.between 50 and 75 psi (350 and 525 kPa) to establish a stable operating condition.
23.The driver/operator of the attack pumper should not attempt to correct minor fluctuations as long as the intake pressure: (434)
A.varies within a range of ten percent.
B.does not drop below 20 psi (140 kPa).
C.does not drop below 40 psi (280 kPa).
D.varies within a range of twenty percent.
B.does not drop below 20 psi (140 kPa).
24.When need for relay pumping has ended, the operation should be discontinued: (434)
A.from the fire scene first.
B.from the relay pumpers first.
C.by all pumpers at the same time.
D.from all relay pumpers then the attack pumper.
A.from the fire scene first.
