13. Relay Pump Operations

Question 1

To establish any type of relay You will need at least __ fire pumpers hose lines and personnel

Answer 1

2

Question 2

One fire pumper is located at a water source it is called the __ pumper

Answer 2

Source pumper

Question 3

___ pumper is the most important pumper in a relay because it is located at a water source it supplies the water to the entire incident

Answer 3

Source

Should be the largest fire pump

Question 4

Fire pumper is located at the fire scene serves as the workhorse at the incident

Answer 4

Attack pumper

Question 5

___ psi per 100 ft when flowing 1000 gpm in a 5 inch hoseline

Answer 5

7 psi

Question 6

A good rule of thumb is that if the discharge pressure will exceed __ psi for LDH or ___ psi for a medium size hose, a relay pumper is needed to boost the water pressure

Answer 6

80 psi

175 psi

Question 7

Ideally no relay operation should extend for more than __ feet

Answer 7

800 ft

Question 8

You should add ___ psi for residual pressure to prevent cavitation

Answer 8

20

Question 9

The most common type of relay, as it uses actual flow calculations to determine the quantity of water required

Answer 9

Calculated flow relay

Question 10

Standardize the supply pressures based on prior experience for relay pumping operations

Answer 10

Constant pressure relays

Question 11

Notes

Goal is to maintain 20 psi of residual pressure

Answer 11

Check valve in tank to pump

Question 12

When shutting down the relay pumping operation, the __ pumper acts first

Answer 12

Attack

Question 13

A __ valve let a pumper connect into the relay without shutting down the entire relay operation

Answer 13

Relay valve