I-C-07 Drafting Evolution 05/18/2021

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Questions and Answers

What is the minimum depth of water required around the strainer during a drafting evolution?

24 inches (correct)

30 inches

18 inches

12 inches

What is the role of the Unit OIC upon arrival at the scene?

To connect the drafting hose immediately

To prepare the discharge valves for operation

To assess the vicinity and call for a drafting evolution (correct)

To secure all equipment in the back of the apparatus

What must be removed from the apparatus when performing a drafting operation, according to standard procedures?

Hydraulic lines

External intake valve (correct)

Tank valve

Drafting hose

What is the impact on pump capacity when using the BIV for drafting?

Reduced to 50-80% of maximum capacity Signup and view all the answers

When should the D/O set the apparatus to 1,000 RPMs?

If manufacturer recommendations are unknown Signup and view all the answers

What action should FFs #3 and #4 take to secure the hose connections?

Tap the swivel of the hose coupling with a rubber mallet Signup and view all the answers

How can successful priming of the pump be indicated?

Movement of the drafting hose Signup and view all the answers

What is the purpose of securing the rope from the strainer to the apparatus?

To prevent the strainer from floating away Signup and view all the answers

Which factor is NOT important when selecting the drafting site?

Visibility from the road Signup and view all the answers

What is the recommended time for an apparatus with a pump rating of 1,500 GPM or more to achieve a successful prime?

45 seconds Signup and view all the answers

What should be done if the pump is at idle and there is no indication of successful priming?

Wait an additional 30 seconds before troubleshooting Signup and view all the answers

What is required before the D/O can begin pumping water from the drafting operation?

Set the apparatus into pump mode Signup and view all the answers

How should the drafting hose be secured to the ladder?

With a series of half hitches around the hose Signup and view all the answers

What is the primary purpose of utilizing a flotation device when drafting from a water source?

To stabilize the suction strainer and reduce the whirlpool effect. Signup and view all the answers

Which equipment is essential when drafting from a well pipe?

A suction strainer, if one is not already integrated. Signup and view all the answers

What technique should be used to measure the well pipe's adequacy for water drafting?

Utilizing the rope previously dropped into the well to confirm water depth. Signup and view all the answers

What safety hazards should be considered when locating field wells?

Potential overgrown vegetation and missing covers over well openings. Signup and view all the answers

Which of the following should NOT be done after a drafting operation is completed?

Leave the drafting hose connected to the apparatus intake. Signup and view all the answers

What is the primary role of the Driver/Operator during a drafting operation?

To recognize and troubleshoot drafting problems promptly. Signup and view all the answers

When attaching the well pipe to the suction strainer, what must be ensured beforehand?

That the strainer is submerged below at least 24 inches of water. Signup and view all the answers

What should be checked before dismounting from the apparatus at the drafting site?

The presence of obstructions and water depth in the field well. Signup and view all the answers

What must firefighters do to secure the well pipe after it is lowered into the well?

Use webbing to tie it off to a secure anchor point. Signup and view all the answers

Which factor may indicate a cavitation issue during drafting operations?

High idling position of the pump causing overheating. Signup and view all the answers

What is the protocol for breaking vacuum seals after drafting operations are complete?

Use a rubber mallet to carefully break the seal. Signup and view all the answers

When receiving a drafting order, what is the first action the Driver/Operator should take?

Stop the apparatus short of the drafting site. Signup and view all the answers

What could indicate that the suction strainer is malfunctioning during drafting?

An inconsistent and erratic water flow. Signup and view all the answers

What is the primary function of the hard suction hose in drafting operations?

To create a negative pressure in the pump Signup and view all the answers

How does a lift greater than 10 feet affect the pump's capacity during drafting?

It reduces the pump’s maximum GPM capacity Signup and view all the answers

Who has the authority to decide whether personal flotation devices should be worn?

The Incident Commander or Unit OIC Signup and view all the answers

What happens if the driver/operator exits the apparatus during drafting operations?

The wheels of the apparatus must be chocked Signup and view all the answers

What effect does the friction loss have on drafting operations?

It can negatively affect pump performance Signup and view all the answers

Which position is referred to as the Unit Officer-in-Charge during suppression operations?

The designated officer positioned at #1 Signup and view all the answers

What constitutes the lift in drafting operations?

The difference in elevation between the static water source and the pump center Signup and view all the answers

What may Unit Officers-in-Charge (OICs) need to do regarding the standard procedures?

Modify them to respond to special or unusual circumstances Signup and view all the answers

Study Notes

Drafting Operations Overview

Drafting evolutions are essential when an adequate water supply is unavailable at an incident.
Primary equipment used includes a hard suction hose and various drafting apparatus.
The drafting operatives consist of a Unit Officer-in-Charge (OIC), Driver/Operator (D/O), and two Firefighters (FFs).

Crew Positions

Unit OIC (#1): Officer supervising operations.
Driver/Operator (#2): Responsible for operating the apparatus.
Firefighter (#3): Positioned behind D/O, assists with operations.
Firefighter (#4): Positioned behind Unit OIC, assists with operations.

Safety Procedures

The D/O must chock wheels and engage the emergency brake before exiting the apparatus.
Personal flotation devices (PFDs) are mandatory for non-swimmers near water.

Drafting Concepts

Drafting is based on creating a negative pressure in the pump to draw water from a static source.
Lift height affects capability; a lift over 10 feet decreases GPM (gallons per minute) capacity.
Friction loss can further hinder pump performance.

Equipment Needed

Essential drafting equipment includes roof ladders, drafting hose sections, suction strainers, rubber mallets, and supplies for securing connections.

Site Arrival and Setup

The Unit OIC identifies a stable drafting site with at least 24 inches of water for strainer usage.
The D/O halts the apparatus 20 feet from the drafting site for safety.
Firefighters must check for hazards and ensure the site is operational.

Hose and Ladder Management

The D/O closes tank and discharge valves before drafting.
A roof ladder is used to elevate the drafting hose with the strainer submerged at least 24 inches below the surface.

Hook-Up and Priming Process

Once hoses are connected, the Unit OIC signals the D/O to adjust location.
Proper connection of drafting hoses is critical, including securing the strainer rope to the apparatus.
The D/O must engage the pump after completing the hook-up.

Pumping Procedures

The D/O sets engine RPM according to manufacturer guidelines.
Pump priming should achieve results within 45 seconds (60 seconds for front intakes).
Successful priming is marked by water discharge and changes in gauges.

Troubleshooting Drafting Issues

Common issues include open valves, loose connections, and obstruction of the strainer.
Cavitation results from air leaks or insufficient water supply.
Overheating indicates inadequate water flow.

Completion and Shutdown Procedures

Operations should not cease until directed by the Incident Commander (IC).
Upon completion, the D/O must gradually idle, close discharge valves, and open drain valves to break the vacuum.
The apparatus should backflush upon accessing municipal water supply after drafting operations.

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Description

This quiz covers essential drafting techniques used in firefighting, particularly when a reliable water supply is absent. It also outlines the riding positions for personnel on a suppression apparatus, emphasizing the roles of the Unit Officer-in-Charge and other firefighters. Test your knowledge on these vital procedures and enhance your firefighting skills.