Fire Apparatus Driver/Operator Chapter 12 + 13

Play an AI-generated podcast conversation about this lesson

What is the approximate pressure drop for every 1,000 ft above sea level?

1 psi

2 psi

3 psi

0.5 psi (correct)

How long should the primer be operated and held for on a pump over 1000 gpm?

30 seconds max

1 minute max

2 minutes max

45 seconds max (correct)

What is the atmospheric pressure at sea level in psi?

14.7 psi (correct)

16.2 psi

12.5 psi

10.0 psi

How high can a column of water be lifted for dependable fire flow?

15 ft Signup and view all the answers

For pumps up to 2000 gpm, what is the lift requirement through hard suction hose?

6 ft Signup and view all the answers

What is the role of the water supply officer in an incident?

Ensure an adequate water supply to mitigate the incident Signup and view all the answers

What is the ideal depth requirement for a floating strainer?

24 inches of water Signup and view all the answers

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. Signup and view all the answers

When a pump is cavitating, what happens when the throttle is increased?

The discharge pressure does not respond and it can make things worse Signup and view all the answers

What is the most commonly used strainer for deep water sources when you are confident it will not touch the bottom?

Barrel strainer Signup and view all the answers

What is the ideal strainer for water sources in which the depth or bottom quality is unknown?

Floating strainer Signup and view all the answers

How much water should be present in all directions when using a barrel strainer?

24 inches Signup and view all the answers

What is the practical limit for lifting water for most fire pumpers?

15 ft Signup and view all the answers

When should the drafting operation be stopped?

When the operation is complete or by order of the IC or water supply officer Signup and view all the answers

What is one of the most common errors during drafting?

Failure to prime the pump Signup and view all the answers

What is the term used by NIMS for a water carrier?

Tender Signup and view all the answers

What is the maximum flow rate for most portable pumps?

250 gpm Signup and view all the answers

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 Signup and view all the answers

What is the difference between a fill site and a static water source for drafting?

The distance from the incident Signup and view all the answers

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 Signup and view all the answers

What is the ideal ground condition for a dump site?

Relatively level and firm Signup and view all the answers

How many portable tanks should a dump site ideally hold in addition to the source pumper?

2 to 3 Signup and view all the answers

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 Signup and view all the answers

Under what conditions can more than one tender be filled at a time?

When using a LDH hydrant manifold or a pumper from draft Signup and view all the answers

What is the recommended capacity for portable tanks carried on tenders?

As much water as the capacity of the tender Signup and view all the answers

What is the recommended maximum pressure to pump medium size hoses for offloading water?

50 psi Signup and view all the answers

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 Signup and view all the answers

Why is using a blowup ball important in portable tank operations?

To prevent whirlpools in shallow water Signup and view all the answers

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 Signup and view all the answers

Why is it preferred to use one tank for dumping and another for drafting?

Water turbulence from dumping could cause a loss of prime Signup and view all the answers

What traffic plan is considered most efficient for water shuttle operations?

A semi-circular direction flow Signup and view all the answers

What is the role of the source pumper in a relay pumping operation?

Supplies water to the entire incident Signup and view all the answers

What should be done when a relay operation needs to extend beyond 800 ft?

Add more pumpers Signup and view all the answers

What is the friction loss variable in a 5" line when flowing 1,000 gpm?

7 psi per 100' Signup and view all the answers

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 Signup and view all the answers

What is the role of the attack pumper in a relay pumping operation?

Providing water to all the hoselines attacking the fire Signup and view all the answers

What makes a relay pumping operation complex?

It involves at least two pumpers to form a relay Signup and view all the answers

Which pumper in a relay operation should have the largest fire pump?

Source pumper Signup and view all the answers

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 Signup and view all the answers

What is the recommended minimum personal protective equipment (PPE) for individuals involved in a relay operation?

Turnout pants, boots, helmet, and gloves Signup and view all the answers

What should the attack pumper do when shutting down a relay operation?

Ensure the tank is full and then slowly throttle down Signup and view all the answers

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 Signup and view all the answers

What is the primary function of a calculated flow relay?

To determine the quantity of water needed based on flow calculations Signup and view all the answers

When do pressure fluctuations become a concern in a relay pumping operation?

When the pressure fluctuation exceeds 200 psi Signup and view all the answers