Chapter 12 Flashcards
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.
25.When shutting down the relay, beginning with the attack pumper and coordinating with other pumpers in the relay, each driver/operator should: (434)
A.slowly increase the throttle and close the dump line valve.
B.slowly increase the throttle and open the dump line valve.
C.slowly decrease the throttle and close the dump line valve.
D.slowly decrease the throttle and open the dump line valve.
D.slowly decrease the throttle and open the dump line valve.
26.What should be done to prevent water hammer? (434)
A.Close all valves slowly.
B.Close all valves quickly.
C.Avoid closing valves during operations.
D.Close valves half-way, wait, then close fully.
A.Close all valves slowly.
27.The open relay method consists of: (435)
A.multiple pumpers of exactly the same size operating in a relay.
B.using a natural water source for supplying relay pumpers.
C.only one source pumper, relay pumper and fire attack pumper.
D.deploying portable folding drop tanks at each intake for pumpers in the relay operation.
D.deploying portable folding drop tanks at each intake for pumpers in the relay operation.
28.Which is an advantage when operating in an open relay? (435)
A.Requires less experienced personnel
B.Decreases operational costs of incidents
C.Eliminates pressure surges and inconsistent supply
D.Increases amount of water available for fire suppression
C.Eliminates pressure surges and inconsistent supply
29.Which is a characteristic of the open relay method? (435)
A.Increases number of personnel required for the relay
B.Provides significant cost savings for long-term operations
C.Requires no adapters or other appliances to connect intake hoses in the system
D.Requires a variety of adapters or other appliances to connect intake hoses in the system
C.Requires no adapters or other appliances to connect intake hoses in the system
30.When medium diameter hose(MDH) is used in relay operations, generally: (435)
A.multiple hoselines are laid.
B.it is supplemented with small diameter hose (SDH).
C.it must be supplemented with large diameter hose (LDH).
D.the MDH will still require only one supply line to meet fireground requirements.
A.multiple hoselines are laid.
31.When large diameter hose (LDH) is used in relay operations: (435)
A.it is supplemented with small diameter hose (SDH).
B.it is supplemented with medium diameter hose (MDH).
C.the LDH often requires only one supply line to meet fireground requirements.
D.multiple supply lines are still required to meet fireground requirements.
C.the LDH often requires only one supply line to meet fireground requirements.
32.What is the purpose of relay relief valves? (435)
A.Enhance firefighter safety
B.Require fewer personnel for the system
C.Allow equipment to exceed recommendations
D.Allow faster operation of the parts of the relay
A.Enhance firefighter safety
33.Pressure relief valves reduce the possibility of damage to the pump and other water supply components that may be caused by water hammer when valves are operated too quickly or: (435)
A.water supply fluctuates.
B.valves are operated too slowly.
C.intake pressures rise dramatically.
D.intake pressures decrease dramatically.
C.intake pressures rise dramatically.
34.When pressure relief valves are preset to allow a predetermined amount of pressure into the fire pump and then the incoming pressure exceeds the preset level, the valve will: (435)
A.automatically close.
B.initiate a warning light that is seen in the cab.
C.close slowly and remain closed until excess pressure/water is stabilized.
D.open and dump excess pressure/water until water is entering the pump at the correct pressure.
D.open and dump excess pressure/water until water is entering the pump at the correct pressure.
35.Many screw-on intake pressure relief valves are also equipped with a gate valve that allows the: (435)
A.pump to be manually shut off.
B.water supply to the pump to be shut off.
C.water supply to the pump to be doubled.
D.pump to signal when water is no longer required.
B.water supply to the pump to be shut off.
36.What is the function of bleeder valves? (435)
A.Allow water supply to the pump to be shut off
B.Allow air to bleed off as incoming supply hose is charged
C.Break the large diameter hose (LDH) into two or more hoselines
D.Allow excess water to bleed off as incoming supply hose is charged
B.Allow air to bleed off as incoming supply hose is charged
37.Which valves allow later arriving pumpers to tie into the relay and boost pressure and volume after it has already started flowing, without interrupting the water supply? (436)
A.Gate valves
B.Bleeder valves
C.Inline relay valves
D.Periphery relay valves
C.Inline relay valves
38.When would a discharge manifold be used to break down the large diameter hose (LDH) into two or more hoselines that may then be connected to different pumpers? (436)
A.During LDH relay operations with limited water supply
B.During LDH relay operations in which personnel are limited
C.During LDH relay operations in which the attack pumper is of large capacity
D.During LDH relay operations that must supply more than one attack pumper
D.During LDH relay operations that must supply more than one attack pumper
1.The pumper that takes water from a hydrant or static source at the beginning of a relay operation is the: (426)
A.fill pumper.
B.relay pumper.
C.initial pumper.
D.water supply pumper.
D.water supply pumper.
2.The pumper that receives water from the source pumper, raises the pressure, and then supplies water to the next apparatus is the: (427)
A.fill pumper.
B.relay pumper.
C.initial pumper.
D.secondary pumper.
B.relay pumper.
3.The factor that MOST determines the need for relay operations is: (427)
A.the number of pumpers needed for the scene.
B.whether the fire is likely to increase significantly.
C.the value of the property involved in the incident.
D.the distance between the incident scene and the water source.
D.the distance between the incident scene and the water source.
4.Which statement about pressure during relay pumping operations for the attack pumper is MOST accurate? (434)
A.Driver/operator should experience no variation in pressure
B.Driver/operator should expect large variations in pressure
C.Driver/operator should expect small variations in pressure
D.Driver/operator will not be able to determine pressure variations
C.Driver/operator should expect small variations in pressure
5.Which should be the first apparatus discontinued when relay operations are no longer needed? (434)
A.Pumpers at the fire scene
B.Pumpers at the water supply
C.Relay pumpers that are first in line
D.Relay pumpers that are last in line
A.Pumpers at the fire scene
6.Which relay method requires no adapters or other appliances to connect intake hoses in the system? (435)
A.Open relay
B.Closed relay
C.Ground relay
D.Portable relay
A.Open relay
7.Which valve opens and dumps excess pressure/water until water is entering pump at correct pressure? (435)
A.Correction valve
B.Inline relay valve
C.Pressure relief valve
D.Pump discharge valve
C.Pressure relief valve
8.Which valve is placed along the length of a supply hose and permits a pumper to connect to the valve to boost pressure in the hose? (436)
A.Correction valve
B.Inline relay valve
C.Pressure relief valve
D.Pump discharge valve
B.Inline relay valve
