Question

1. both nfpa and osha define an oxygen - deficient atmosphere as one containing less than ____ percent oxygen.

a. 15.5
b. 18
c. 19.5
d. 21

1. open - circuit scba uses compressed:

a air.
b. gases.
c. oxygen.
d. carbon dioxide.

1. scba facepiece fit tests should occur ___ to ensure that the facepiece still creates an airtight seal.

a. after each use
b. weekly
c. monthly
d. annually

1. what is one scba equipment limitation?

a. cannot be donned quickly
b. decreased mobility of the wearer
c. unique facial features of the wearer
d. no indicators of low pressure in the scba unit

1. scba stored in cases can be donned using the over - the - head method or the ____ method.

a. coat
b. seat mount
c. compartment
d. external mount

1. when donning an scba facepiece:

a. tighten the straps by pulling them outward and to the side.
b. ensure the protective hood is over the facepiece harness or straps.
c. ensure the facepiece harness or straps seal over the protective hood.
d. tighten the top straps first, then the temple straps, and finish with the lower straps.

1. when wearing scba in an idlh atmosphere, responders should:

a. exit the idlh before the low air alarm activates.
b. ensure air supply duration is the same for everyone.
c. exit the idlh once the air supply switches to the reserve cylinder.
d. deactivate scba once visibility improves in the area to conserve air.

1. what is an example of an emergency exit indicator?

a. changes in oxygen level
b. the situation is stabilized
c. an air cylinder needs replaced
d. a change in operational strategy

1. at the first sign of any exit indicator, team members must:

a. leave as a group or in pairs.
b. leave using different egress paths.
c. begin to monitor the situation to see if it worsens.
d. let those with the lowest amount of air supply exit first.

Explanation:

• Question 9: NFPA and OSHA standards define an oxygen - deficient atmosphere as having less than 19.5% oxygen.
• Question 10: Open - circuit SCBA uses compressed air.
• Question 11: SCBA facepiece fit tests should occur annually to ensure an airtight seal.
• Question 12: One limitation of SCBA is decreased wearer mobility.
• Question 13: SCBA in cases can be donned via the over - the - head or coat method.
• Question 14: When donning, tighten top, temple, then lower straps.
• Question 15: In IDLH, exit before low - air alarm.
• Question 16: An air cylinder needing replacement is an emergency exit indicator.
• Question 17: At exit signs, leave as a group/pair.

Answer:

1. C. 19.5
2. A. air
3. D. annually
4. B. Decreased mobility of the wearer
5. A. coat
6. D. tighten the top straps first, then the temple straps, and finish with the lower straps
7. A. exit the IDLH before the low air alarm activates
8. C. An air cylinder needs replaced
9. A. leave as a group or in pairs