forensics fire quiz

What is the primary goal of a fire investigator at a fire scene?

To determine the fires origin and cause

Why are many arson cases linked to another crime?

Fires are used to hide evidence of other crimes

What is the "chimney effect" in a fire scene?

A vertical path of heat and flames through openings

What is the most frequent reason juveniles commit arson?

Reckless vandalism

One of these is NOT essential to keep a fire burning. Which is it?

Hydrogen Gas

A very narrow V-pattern might suggest which of the following?

Use of an accelerant

Which of the following is NOT part of the fire triangle?

Hydrogen Gas

Which of the following is a dangerous myth in arson investigation?

All floor patterns indicate accelerant use

What role does ventilation play in fire behavior?

It provides oxygen that can make a fire worse

Which type of heat transfer occurs when hot gases rise and spread across the ceiling?

Convection

Which stage of fire development consumes the most available fuel?

Fully developed

____ are trails of accelerant used to spread fire from one area to another.

Streamers

How should fire evidence be stored to avoid contamination?

Metal containers

Which of the following is NOT a reliable method for detecting accelerants?

Smelling for gasoline

Which component of the fire triangle is most commonly targeted to extinguish a fire?

Heat

What is the legal definition of arson?

Intentionally and unlawfully setting a fire

What type of heat transfer occurs when heat moves through a solid, such as a metal beam?

Conduction

Which is a common myth that has led to wrongful arson convictions?

All floor burns indicate the use of accelerants

What is one of the first things fire investigators must identify?

The point where the fire began

Investigators typically work from areas of:

Least damage to most damage

Fire investigators use a document called NFPA 921 to guide their work. This guide was created to make sure fire investigations are based on evidence and follow a clear, step-by-step process rather than opinions or assumptions. Why is NFPA 921 important in the field of forensic science?

It outlines a standardized, scientific approach to fire investigations

What method explains heat transfer via air or smoke?

Convection

The ATF investigates fires involving explosives, incendiary devices, and federal property. Based on this, why would they lead a fire investigation?

They investigate explosives and federal crimes

Which burn pattern is typically used to identify the fire’s origin?

V-pattern

Which of the following is a common motive for arson

Crime concealment

When smoke and hot gases hit walls, what usually happens?

The fire spreads outward

The ATF investigates fires involving explosives, incendiary devices, and federal property. Based on this, why would they lead a fire investigation?

They investigate explosives and federal crimes