Ch. 12 Relay pumping

Question 1

ch. 12. pg.432
Once the water supply has been established, the source pumper should open a discharge or allow water to discharge through a dump line until the first relay pumper is ready for water. Failure to keep water moving through the pump may result in:
A. drop in residue pressure
B. delay in water supply to the relay
C. loss of prime or overheating the pump
D. failure to lift water front static water supply

Answer 1

C. loss of prime or overheating the pump

Question 2

ch. 12 pg. 432
When evaluating the relay pumping operation the overall capacity of the system is determined by:
A. The source pumper and hose diameter
B. hose diameter and distance of relay
C. source pumper and smallest pump in the relay
D. smallest pump and diameter of hose used in the relay.

Answer 2

D. smallest pump and diameter of hose.

Question 3

Ch. 12. pg 432
When relaying long distances the hose lays between each pumper should be equalized as possible.
If a pumper carrying 3 inch supply hose lays dual supply lines as part of the operation its portion of the lay is limited to:
A. 300 feet
B. 500 feet
C. 900 feet
D. 2050 feet.

Answer 3

C. 900 feet.

Question 4

Ch. 12 pg. 433 
Once the water supply has been established, and the relay system is in operation.  The D/O is advised to maintain  an intake pressure 20-30 psi.  Which apparatus is he operating in the system. 
A. source pumper 
B. Relay pumper 
C. attack pumper 
D. Tandum pumper.

Answer 4

B. Relay pumper.

Question 5

Ch. 12 pg. 433 
A relay pumping operation begins with the largest capacity pumper working from the water source. The relay pumper should be waiting on water.  Which of the following does the relay pumper not need to do: 
A. pump out of gear 
B.   open dump line 
C. open bleeder valve
D. open discharge

Answer 5

C. open the bleeder valve.

really a bleeder valve is a discharge. but ch 12 lists the other three.

Question 6

Ch. 12 pg. 432

When relaying long distances, the hose lays between each pumper should be:

Answer 6

as equalized as possible.

in cases where multiple diameters of hose are used the distances between pumpers must be adjusted accordingly.

Question 7

Ch. 12 pg. 428
Centrifugal pumps are rated to pump at their maximum volume at _______.
200 psi _____
250 psi _____

Answer 7

150 psi
70%
50%

Question 8

p.427 Tender and Large Diameter Hose
+Term used within ICS for a mobile piece of apparatus that has the primary function of supporting another operation.
+Relay supply hose size range

Answer 8

+Tender

+3 1/2 to 6 in

Question 9

p.427 Relay Pumping
+Need for relay pumping determined by?
Amount of water required will have a major impact on the__ of the relay system.
+Elevation pressure is only affected by?
+For relay pumpers,Intake relief valve should be set at__psi above the static pressure of the water system or __psi above the discharge of the previous pumper in the relay.
+For attack pumpers, the intake relief valve should be set between __psi and__psi to establish a stable operating condition.

Answer 9

\+Amount of water and distance
Design
\+Topography
10psi and 10psi
50 to 75 psi

Question 10

Ch. 12 pg. 430 
Minimum pump capacities to flow: 
pump capacity     -     Flow
1250 gpm   -            750 gpm 
1500 gpm  -             1000 gpm 
1750 gpm    -            1250 gpm.

Answer 10

gpm capacity of a pumper - 500 = flow capacity of the system.

Question 11

pumping ch. 14 pg. 490

the rate at which foam is applied depends on several variables, including: (4)

Answer 11

• the type of concentrate
• whether or not the fuel is on fire
• type of fuel involved (hydrocarbon / polar solvent)
• whether the fuel is contained or uncontained.