Chapter 6 SCBA and PASS

Question 1

Wearing vs Using mask:

Answer 1

Wearing a mask is having the harness on, using is having facepiece donned

Question 2

All members shall use SCBA when;

Answer 2

• Performing interior structural firefighting operations
• Performing interior structural emergency operations when toxic substances or smoke are present
• Operating at outside positions where exposed to smoke or toxic substances
• Operating in confined spaces, as defined in training bulletin MASK
• If a member of a company, using a SCBA, leaves a contaminated area, he mush be accompanied to a safe area by another member using a SCBA
• The only maintenance that we can do on the SCBA is O-Ring change and batteries

Question 3

When are masks inspected:

Answer 3

1. Immediately after roll call 0900 and 1800
2. Immediately before Multi-Unit Drills
3. After every use

Question 4

Full cylinder PSI is:

Answer 4

Full cylinder is 4500PSI

Question 5

Cylinder Tank Size/Work Time/Exit Time

Answer 5

Tank Size Work Time Exit Time
30 mins 11mins 6 mins
45 mins 16 mins 9 mins
60 mins 22 mins 12 mins

Question 6

Hoop Wrapped Cylinder –

Answer 6

An aluminum cylinder which is partially wrapped with layers of fiberglass. The fiberglass wrapping starts at the widest portion of the cylinder neck and ends just before the flat bottom. The neck and bottom of the cylinder are not wrapped.

Question 7

Polar Wrapped Cylinder –

Answer 7

An aluminum cylinder which is fully wrapped with layers of fiberglass, including both the neck and round bottom of the cylinder

Question 8

The vibralert will activate in three situations:

Answer 8

1. When you first turn on the SCBA
2. When the cylinder have a ¼ of a tank left (1050 PSI)
3. When there is a malfunction in the PRA

Question 9

Regulator

Answer 9

Pressure slight above atmospheric (positive pressure), Spray bar, Sponge rubber washer, Snap lock, Vibralert, Manual Shut off

Question 10

Pressure Reducer Assembly (PRA) -

Answer 10

Reduces the operating pressure to 100 PSI before entering the regulators low pressure hose. The regulator then controls the pressure within the face piece to slightly above atmospheric

Question 11

Low Pressure Hose –

Answer 11

The low pressure hose conveys breathing air from the pressure reducer assembly to the regulator assembly. Pressure within this hose is around 100 PSI.

Question 12

Purge valve should be in the ___ o’clock position.

Answer 12

12 o’clock position. Purge is also used to clean the facepiece.

Question 13

When one member forcibly strikes another member with ____ distinct blows on the shoulder and then pulls that member in a specific direction, the second member will recognize that the other member knows of an emergency and should promptly follow in that direction.

Answer 13

Four distinct blows on the shoulder

Question 14

Sharing facepieces is PROHIBITED except for:

Answer 14

life saving purposes