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IFSTA 7 question bank with complete solution verified 2025 updated Which product of combustion acts as a chemical asphyxiant by excluding oxygen from the blood, leading to hypoxia of the brain and tissues? A) Carbon dioxide (CO2) B) Carbon monoxide (CO) C) Aerosolized fuel particles D) Hydrogen...

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  • May 20, 2023
  • 15
  • 2022/2023
  • Exam (elaborations)
  • Questions & answers

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  • which product of combustion acts as a chemical asphyxiant by excluding oxygen from the blood
  • leading to hypoxia of the brain and tissues a
  • ifsta 7 question bank with complete solution verif

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  • IFSTA 7

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IFSTA 7 question bank with complete
solution verified 2023
Which product of combustion acts as a chemical asphyxiant by excluding oxygen from
the blood, leading to hypoxia of the brain and tissues?
A) Carbon dioxide (CO2)
B) Carbon monoxide (CO)
C) Aerosolized fuel particles
D) Hydrogen cyanide (HCN) - correct answer B

Combustion can occur within a range of concentration of fuel vapor and air; this range is
referred to as the:
A) vapor pressure range.
B) surface to mass range.
C) flammable (explosive) range.
D) oxidation (combustion) range. - correct answer C

Which statement describes the factor that MOST influences compartment fire
development?
A) Whether the fire is fuel-limited or ventilation-limited
B) Whether the fuel is cellulose-based or petroleum-based
C) Ratio of square footage to ceiling height of the compartment
D) Ambient temperature and wind speed outside the compartment - correct answer A

An extinguishing agent, such as dry chemical or Halon-replacement agent, terminates
the combustion reaction by:
A) cutting off the oxygen supply to the fuel.
B) interfering with the chemical chain reaction.
C) cooling the fuel below the ignition temperature.
D) reacting with the fuel to create a fire-resistant layer. - correct answer B

Materials that burn at normal oxygen levels will burn more intensely in _____
atmospheres.
A) flaming
B) nonflaming
C) oxygen-enriched
D) oxygen-deficient - correct answer C

Which situation would likely be granted an exception to the rule that prohibits filling an
unshielded air cylinder while a firefighter is wearing the SCBA?
A) The SCBA was manufactured within the past five to ten years.
B) A rapid intervention crew (RIC) is rescuing a trapped or incapacitated firefighter.
C) The firefighter filling the empty cylinder is wearing full structural personal protective
equipment.

, D) A firefighter with a higher rank than the firefighter wearing the SCBA cylinder is
available to perform the refill. - correct answer B

What is a general safety precaution to take when refilling an SCBA cylinder?
A) Wear full structural fire fighting PPE.
B) Fill the cylinder as quickly as possible.
C) Perform a hydrostatic test on the cylinder.
D) Check the hydrostatic test date of the cylinder. - correct answer D

Which piece of information must be included on the permanent compliance label inside
each piece of PPE?
A) Firefighter's name
B) Department name
C) Cleaning precautions
D) Wearing instructions - correct answer C

Which type of breathing air source would be found inside a high-rise building?
A) Stationary fill system
B) Auto-cascade fill system
C) High-rise specific cascade system
D) Firefighter Breathing Air Replenishment System - correct answer D

Annual SCBA inspections and maintenance should be performed by:
A) a company officer.
B) all available firefighters.
C) specially trained, factory-qualified technicians.
D) the highest-ranking fire department personnel. - correct answer C

After each use, the SCBA facepiece should be:
A) cleaned, dried, and placed out of service.
B) washed with warm water and a mild disinfectant.
C) sanitized using a machine built specifically for facepieces.
D) sent to the manufacturer for a commercial-grade cleaning. - correct answer B

When donning an unmounted SCBA, the SCBA unit should be:
A) stored in an outside compartment of the apparatus.
B) placed on the ground with all of the straps extended.
C) stored in a specialized compartment inside the apparatus.
D) placed behind the firefighter with all of the straps tightened. - correct answer B

Immediately prior to donning SCBA, firefighters should:
A) record inspections in the SCBA log.
B) perform a hydrostatic test on the cylinder.
C) check to make sure that the bypass valve is disabled.
D) check the cylinder gauge to make sure the cylinder is full. - correct answer D

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