1|Page
IAAI CFI Exam Study Guide | Certified Fire
Investigator Exam Prep | Practice Questions & Detailed
Review
1. A liquid with a flash point ABOVE 100°F is classified as what type of liquid?
A) Flammable Liquid
B) Combustible Liquid
C) Combustible Liquid
D) Ignitable Liquid
2. 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?
A) 0 amps
B) 12.5 amps
C) 12.5 amps
D) 1500 amps
3. If a hair dryer draws 8.3 amps in a home with 120-volt service, what is the wattage using the
formula Power = current x voltage?
A) 830 watts
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B) 996 watts
C) 1000 watts
D) 1200 watts
4. What year was the first edition of NFPA 1033 published?
A) 1977
B) 1982
C) 1987
D) 1992
5. What is the recommended distance for securing the perimeter of a blast scene measured from
the furthest debris?
A) Equal distance
B) 1.25 times
C) 1.5 times
D) 2.0 times
6. What temperature in the upper gas layer causes the onset of Flashover?
A) 900°F
B) 1000°F
C) 1100°F
D) 1200°F
7. At what temperature does copper melt?
A) 1500°F
B) 1760°F
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C) 1960°F
D) 2100°F
8. What measurement of radiant heat flux from the gas layer to the floor indicates the onset of
flashover?
A) 1 W/cm²
B) 1.5 W/cm²
C) 2 W/cm²
D) 2.5 W/cm²
9. What is the voltage between the two hot wires at the service entrance cables in most single-
family residences in the United States with single-phase service and three wires?
A) 120 volts
B) 208 volts
C) 240 volts
D) 277 volts
10. What is the revision cycle time span for NFPA 921?
A) 2 years
B) 2.5 years
C) 3 years
D) 5 years
11. What is the flash point of power steering fluid?
A) 200°F
B) 275°F
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C) 350°F
D) 400°F
12. In high-pressure fuel-injected vehicles, what is the typical range of pressure used to pump
fuel from a fuel tank?
A) 15-30 p.s.i.
B) 25-50 p.s.i.
C) 35-70 p.s.i.
D) 50-100 p.s.i.
13. What are the lower explosive limit and upper explosive limit of natural gas (methane)?
A) 3 and 15
B) 4 and 16
C) 5 and 17
D) 6 and 18
14. What is the ignition temperature of power steering fluid?
A) 450°F
B) 550°F
C) 680°F
D) 750°F
15. Any substance that can undergo combustion is defined as what?
A) Oxidizer
B) Heat source
IAAI CFI Exam Study Guide | Certified Fire
Investigator Exam Prep | Practice Questions & Detailed
Review
1. A liquid with a flash point ABOVE 100°F is classified as what type of liquid?
A) Flammable Liquid
B) Combustible Liquid
C) Combustible Liquid
D) Ignitable Liquid
2. 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?
A) 0 amps
B) 12.5 amps
C) 12.5 amps
D) 1500 amps
3. If a hair dryer draws 8.3 amps in a home with 120-volt service, what is the wattage using the
formula Power = current x voltage?
A) 830 watts
,2|Page
B) 996 watts
C) 1000 watts
D) 1200 watts
4. What year was the first edition of NFPA 1033 published?
A) 1977
B) 1982
C) 1987
D) 1992
5. What is the recommended distance for securing the perimeter of a blast scene measured from
the furthest debris?
A) Equal distance
B) 1.25 times
C) 1.5 times
D) 2.0 times
6. What temperature in the upper gas layer causes the onset of Flashover?
A) 900°F
B) 1000°F
C) 1100°F
D) 1200°F
7. At what temperature does copper melt?
A) 1500°F
B) 1760°F
,3|Page
C) 1960°F
D) 2100°F
8. What measurement of radiant heat flux from the gas layer to the floor indicates the onset of
flashover?
A) 1 W/cm²
B) 1.5 W/cm²
C) 2 W/cm²
D) 2.5 W/cm²
9. What is the voltage between the two hot wires at the service entrance cables in most single-
family residences in the United States with single-phase service and three wires?
A) 120 volts
B) 208 volts
C) 240 volts
D) 277 volts
10. What is the revision cycle time span for NFPA 921?
A) 2 years
B) 2.5 years
C) 3 years
D) 5 years
11. What is the flash point of power steering fluid?
A) 200°F
B) 275°F
, 4|Page
C) 350°F
D) 400°F
12. In high-pressure fuel-injected vehicles, what is the typical range of pressure used to pump
fuel from a fuel tank?
A) 15-30 p.s.i.
B) 25-50 p.s.i.
C) 35-70 p.s.i.
D) 50-100 p.s.i.
13. What are the lower explosive limit and upper explosive limit of natural gas (methane)?
A) 3 and 15
B) 4 and 16
C) 5 and 17
D) 6 and 18
14. What is the ignition temperature of power steering fluid?
A) 450°F
B) 550°F
C) 680°F
D) 750°F
15. Any substance that can undergo combustion is defined as what?
A) Oxidizer
B) Heat source
