Standard Basic Relay Operation

Question 1

Relay Officer drives his vehicle from the water source to the incident using his odometer to measure the distance in ____.

Answer 1

tenths of a mile.

Question 2

He requests ___ apparatus with 3½” hose per tenth of a mile or Portion thereof plus one company for the hydrant

Answer 2

one triple

Question 3

A standard ___ hose bed will cover 528’ (1/10 mile) with sufficient slack hose to make connections at each end.

Answer 3

600’

Question 4

Triple engines with ____ only should not be used except at the hydrant.

Answer 4

2½” hose

Question 5

If the necessity arises to use them in the relay, they should lay 600’ of ___. The total capacity of the relay will be limited to ___ gpm.

Answer 5

two 2½” lines / 700

Question 6

All pump operators will build pressure as their suction gauge pressure increases. On flat terrain, all pumps will maintain ____ engine pressure using their gate pressure gauge.

Answer 6

180 psi

Question 7

The delivery to each succeeding pump in the line will be ____ positive pressure.

Answer 7

900 gpm at 10 psi

Question 8

Remember, in a relay situation, shutdowns are always initiated at the ____.

Answer 8

source of supply

Question 9

Older reserve apparatus with 2½” discharge gates, depending on the design of the gate, will experience as much as ____ friction loss in the gate when 900 gpm is flowing.

Answer 9

50 psi

Question 10

Do not use shutoff butts. They will restrict the flow of water to approximately ____.

Answer 10

450 gpm

Question 11

When 3½” hose is used and large quantities of water are desired, four-way valves should not be used in the line due to the ____.

Answer 11

added restriction

Question 12

Do not use ___ bypasses in conjunction with 3½” hose lays.

Answer 12

2½”