IAAI CFI STUDY GUIDE UPDATED
PRACTICE SOLUTION SET 2026
TESTED QUESTIONS WITH VERIFIED
ANSWERS GRADED A+
◉ If the current flowing out from an electrical panel is 12.5 amps, and it
then flows through an electrical load of 1500 watts, what is the
amperage of the remaining current flow of the return circuit?.
Answer: 12.5
◉ If a hair dryer draws 8.3amps (in a home with 120-volt service), what
is the wattage?
*Power (P) = current (I) x voltage (V)
Watts = amps x volts.
Answer: 1000
◉ The year of the first edition of NFPA 1033.
Answer: 1987
◉ The recommended distance for securing the perimeter of a blast scene
*That is, the distance from the furthest debris.
,Answer: 1.5 times
◉ What temperature in the upper gas layer causes the onset of
Flashover?.
Answer: 1100°F
◉ The temperature at which copper melts.
Answer: 1960°F
◉ The measurement of the radiant heat flux (from gas layer to the floor)
that indicates the onset of flashover.
Answer: 2 W/cm2
◉ The voltage between the two hot wires at the service entrance cables
in most single-family residences in the United States (single-phase
service with three wires).
Answer: 240 volts
◉ The revision cycle for NFPA 921 (timespan).
Answer: 3 years
◉ The flash point of power steering fluid.
Answer: 350°F
,◉ In high-pressure fuel-injected vehicles, this is the typical range of
pressure that is used to pump fuel from a fuel tank.
Answer: 35-70 p.s.i.
◉ The lower explosive and upper explosive limit of natural gas
(methane)?.
Answer: 5 and 17
◉ The ignition temperature of power steering fluid.
Answer: 680°F
◉ Any substance that can undergo combustion.
Answer: Fuel
◉ Two factors or situations leading to a fire that may show the nature of
the incident responsibility..
Answer: Act or Omission
◉ This concept should not be included in a summary report of findings..
Answer: Additional Investigative Recommendations
◉ A law that may govern the fire investigation of a boat.
Answer: Admiralty Law
, ◉ A type of device in a vehicle, which can cause an electrical overload
to factory installed wiring.
Answer: After-market Equipment
◉ Evidence of smoke or soot in the lungs, bronchi, and trachea is one of
the most significant factors in confirming that, at the time of the fire, the
victim was WHAT?.
Answer: Alive and Breathing
◉ Those who have the responsibility for monitoring safety conditions at
the fire or explosion scene.
Answer: All Team Members
◉ The melting temperature of aluminum.
Answer: 1220°F
◉ Which one of these is NOT considered a competent ignition source?
Metal-to-metal sparks,
Aluminum-to-pavement sparks,
Metal-to-pavement sparks,
Motor bearing sparks.
Answer: Aluminum-to-pavement sparks
PRACTICE SOLUTION SET 2026
TESTED QUESTIONS WITH VERIFIED
ANSWERS GRADED A+
◉ If the current flowing out from an electrical panel is 12.5 amps, and it
then flows through an electrical load of 1500 watts, what is the
amperage of the remaining current flow of the return circuit?.
Answer: 12.5
◉ If a hair dryer draws 8.3amps (in a home with 120-volt service), what
is the wattage?
*Power (P) = current (I) x voltage (V)
Watts = amps x volts.
Answer: 1000
◉ The year of the first edition of NFPA 1033.
Answer: 1987
◉ The recommended distance for securing the perimeter of a blast scene
*That is, the distance from the furthest debris.
,Answer: 1.5 times
◉ What temperature in the upper gas layer causes the onset of
Flashover?.
Answer: 1100°F
◉ The temperature at which copper melts.
Answer: 1960°F
◉ The measurement of the radiant heat flux (from gas layer to the floor)
that indicates the onset of flashover.
Answer: 2 W/cm2
◉ The voltage between the two hot wires at the service entrance cables
in most single-family residences in the United States (single-phase
service with three wires).
Answer: 240 volts
◉ The revision cycle for NFPA 921 (timespan).
Answer: 3 years
◉ The flash point of power steering fluid.
Answer: 350°F
,◉ In high-pressure fuel-injected vehicles, this is the typical range of
pressure that is used to pump fuel from a fuel tank.
Answer: 35-70 p.s.i.
◉ The lower explosive and upper explosive limit of natural gas
(methane)?.
Answer: 5 and 17
◉ The ignition temperature of power steering fluid.
Answer: 680°F
◉ Any substance that can undergo combustion.
Answer: Fuel
◉ Two factors or situations leading to a fire that may show the nature of
the incident responsibility..
Answer: Act or Omission
◉ This concept should not be included in a summary report of findings..
Answer: Additional Investigative Recommendations
◉ A law that may govern the fire investigation of a boat.
Answer: Admiralty Law
, ◉ A type of device in a vehicle, which can cause an electrical overload
to factory installed wiring.
Answer: After-market Equipment
◉ Evidence of smoke or soot in the lungs, bronchi, and trachea is one of
the most significant factors in confirming that, at the time of the fire, the
victim was WHAT?.
Answer: Alive and Breathing
◉ Those who have the responsibility for monitoring safety conditions at
the fire or explosion scene.
Answer: All Team Members
◉ The melting temperature of aluminum.
Answer: 1220°F
◉ Which one of these is NOT considered a competent ignition source?
Metal-to-metal sparks,
Aluminum-to-pavement sparks,
Metal-to-pavement sparks,
Motor bearing sparks.
Answer: Aluminum-to-pavement sparks
