IFSTA 12 Relay Pumping

Question 1

define relay operation

3rd 425

Answer 1

Two or more pumpers used to move water over a long distance by operating series also known as relay pumping

Question 2

define large diameter hose

3rd 427

Answer 2

3 1/2 inch to 6 inches in diameter

Question 3

what considerations are taken to determine the need of a relay pumping operation
3rd 427

Answer 3

Total volume of water needed

distance between incident scene and water source

Question 4

fire department pumpers are ready to flow their maximum volume at what pressure
3rd 429

Answer 4

150 psi

Question 5

pumpers are rated to flow 70% of their max volume at what pressure
3rd 429

Answer 5

200 psi

Question 6

fire department poppers are rated the flow 50% of the maximum volume at what pressure
3rd 429

Answer 6

250 psi

Question 7

The overall capacity of a relay operation system is determined by what
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Answer 7

Apparatus for the smallest pump and the smallest diameter of hose used in the relay

Question 8

attack engines should set their pressure governors in what mode during a relay operation
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Answer 8

Pressure mode

Question 9

source and relay pumpers should set their pressure governors to what mode during a relay operation
3rd 433

Answer 9

RPM mode

Question 10

For relay pumpers equipped with adjustable intake relief valves how many psi above the static pressure of the water system should they be set
3rd 434

Answer 10

10

Question 11

attack pumpers equipped with adjustable intakes should have them set at what range
3rd 434

Answer 11

50-75 psi

Question 12

define open relay method

3rd 435

Answer 12

Method of relay pumping where portable folding tanks are deployed at each intake for pumpers in the relay operation. operating from the portable tank eliminates the pressure surges and inconsistent supplies