44 Questions
What is the approximate pressure drop for every 1,000 ft above sea level?
0.5 psi
How long should the primer be operated and held for on a pump over 1000 gpm?
45 seconds max
What is the atmospheric pressure at sea level in psi?
14.7 psi
How high can a column of water be lifted for dependable fire flow?
15 ft
For pumps up to 2000 gpm, what is the lift requirement through hard suction hose?
6 ft
What is the role of the water supply officer in an incident?
Ensure an adequate water supply to mitigate the incident
What is the ideal depth requirement for a floating strainer?
24 inches of water
How can you identify a suspected vacuum leak in a pump?
Place an EMS glove over an uncapped discharge and pull the primer. If the glove sucks in, there is a leak.
When a pump is cavitating, what happens when the throttle is increased?
The discharge pressure does not respond and it can make things worse
What is the most commonly used strainer for deep water sources when you are confident it will not touch the bottom?
Barrel strainer
What is the ideal strainer for water sources in which the depth or bottom quality is unknown?
Floating strainer
How much water should be present in all directions when using a barrel strainer?
24 inches
What is the practical limit for lifting water for most fire pumpers?
15 ft
When should the drafting operation be stopped?
When the operation is complete or by order of the IC or water supply officer
What is one of the most common errors during drafting?
Failure to prime the pump
What is the term used by NIMS for a water carrier?
Tender
What is the maximum flow rate for most portable pumps?
250 gpm
What is the benefit of a fill site at a static water source?
It allows the pumper drafting water to supply tenders at a remote location
What is the difference between a fill site and a static water source for drafting?
The distance from the incident
What is the ideal requirement for establishing a suitable drafting site for a portable pump?
24 inches of water in all directions around the strainer
What is the ideal ground condition for a dump site?
Relatively level and firm
How many portable tanks should a dump site ideally hold in addition to the source pumper?
2 to 3
What is the ideal dump site in relation to the source pumper and tenders?
Close enough for the source pumper to supply the attack pumper without a relay, but not so close that tenders cannot access it
Under what conditions can more than one tender be filled at a time?
When using a LDH hydrant manifold or a pumper from draft
What is the recommended capacity for portable tanks carried on tenders?
As much water as the capacity of the tender
What is the recommended maximum pressure to pump medium size hoses for offloading water?
50 psi
What type of line is a jet siphon attached to and at what pressure is it pumped?
1.5 or 1.75" line, 100 to 125 psi
Why is using a blowup ball important in portable tank operations?
To prevent whirlpools in shallow water
What is the purpose of nurse tender operation in fire service?
Offloading a tender into another tender or pumper as a form of a water source
Why is it preferred to use one tank for dumping and another for drafting?
Water turbulence from dumping could cause a loss of prime
What traffic plan is considered most efficient for water shuttle operations?
A semi-circular direction flow
What is the role of the source pumper in a relay pumping operation?
Supplies water to the entire incident
What should be done when a relay operation needs to extend beyond 800 ft?
Add more pumpers
What is the friction loss variable in a 5" line when flowing 1,000 gpm?
7 psi per 100'
When is a relay operation needed to boost water pressure?
If the discharge pressure will exceed 80 psi for LDH or 175 psi for MDH
What is the role of the attack pumper in a relay pumping operation?
Providing water to all the hoselines attacking the fire
What makes a relay pumping operation complex?
It involves at least two pumpers to form a relay
Which pumper in a relay operation should have the largest fire pump?
Source pumper
What is the primary purpose of relay valves in a fire service relay operation?
To hook up into a relay without shutting down the entire operation
What is the recommended minimum personal protective equipment (PPE) for individuals involved in a relay operation?
Turnout pants, boots, helmet, and gloves
What should the attack pumper do when shutting down a relay operation?
Ensure the tank is full and then slowly throttle down
When may pumpers be added to an existing relay in a fire service operation?
When there is not enough pressure or flow to meet the demands of the attack pumper
What is the primary function of a calculated flow relay?
To determine the quantity of water needed based on flow calculations
When do pressure fluctuations become a concern in a relay pumping operation?
When the pressure fluctuation exceeds 200 psi
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