Foam

Question 1

What is the foam application rate?

Answer 1

The foam application rate is 6.5 L/min/m2.

Question 2

What is the Foam % for class of fire (3% / 6%) ?

Answer 2

0.5% for deep seated Class A fires

3% for hydrocarbons

6% for polar solvents (alcohol resistant)

Question 3

What are the Low and medium foam expansion rates?

Answer 3

Low: 2:1 to 20:1

Medium: 20:1 to 200:1

Question 4

What are 3 foam laying techniques?

Answer 4

1- Laying foam in front of the fire and allowing it to flow over the fire

2 - Using a wall or other solid object to bank the foam onto the fire

3- Lobbing the foam onto the fire by pointing the branch upwards

Question 5

Name two types of Foam systems

Answer 5

Foam Major system
- delivers foam through any and every outlet that is open
- 0.1%-10% injection range
- 159 L/min system capacity
- 3800 L/min maximum delivery flow (3% induction)
- 2650 L/min maximum delivery flow (6% induction)

Question 6

What are the uses for foam?

Answer 6

Contributes to cooling and removing oxygen from the fire.

Ensure there is enough foam concentrate available to complete the task.

Mixture of foam concentrate, water and air. Aspirated from the branch

.

Question 7

What are the advantages of Foam

Answer 7

1 - Reduces dangers of re-ignition providing enough foam to begin with due to smothering
2 - required less water as it’s lighter than water
3 - can flood a compartment

Question 8

List the two (2) delivery capability of the MKV Pumper/Pumper Tanker that relate to the fitted foam systems (Foam Major Systems).

Answer 8

1) The Foam Major - delivers up to 2650 litres per minute of premix foam solution
inducted at 6%

2) The Foam Major -delivers up to 3800 litres per minute of premix foam solution
inducted at 3 %.

Question 9

Approximate the flow rate through a hose reel at the following pressures.

1000 kPa
2000 kPa
3000 kPa

Answer 9

1000 kPa - 100 LPM
2000 kPa - 200 LPM
3000 kPa - 300 LPM

Question 10

Approximate the combined flow rate through two (2) hose reels at 3000 kPa.

Answer 10

470 L/min

Question 11

List three (3) signs that indicate to the operator that the low water level warning system has activated.

Answer 11

• Audible tones, which activate for 20 seconds.
• Flashing amber strobes on roof of appliance
• Amber dashboard light.
• Amber light on the primary panel