Arson Lab Analysis H

What are the key elements of fire investigation?

I. How fire is defined

II. How fire is developed

III. How fire behaves

IV. How to build a case supported by evidence & reasoning

• I and II only

• I, II, and III only

• II, III, and IV only

• I, II, and IV only

•   I, II, III, and IV

Which phases of matter can burn?

• Gases only

• Liquids only

• Solids only

• Gases and solids only

• Gases, liquids, and solids

Which of these must be present to start a fire?

I.                     oxygen

II.                   fuel

III.                 soot

IV.                heat 

• I and II only

•    I, II, and III only

• II, III, and IV only

• I, II, and IV only

• I, II, III, and IV

What type of fuel releases the most smoke and soot?

• wood in campfire

•   synthetic furniture

• furniture natural fibers

• gasoline in a car engine

• wax burning from a candle

What is the order for the phases of a fire represented in the picture?

• Ignition, decay, growth, full development

• Growth, decay, ignition, full development

• Full development, ignition, growth, decay

• Decay, full development, ignition, growth

• Growth, decay, full development, ignition

Which of the following choices correctly identifies the photos, moving from left to right?

• Thermal plume, ceiling jet, hot gas layer

• Ceiling jet, hot gas layer, thermal plume

• Hot gas layer, thermal plume, ceiling jet

• Thermal plume, hot gas layer, ceiling jet

• Ceiling jet, thermal plume, hot gas layer

What does the graph indicate about vented and unvented fires?

• Vented and unvented fires burn with the same level of heat.

• Unvented and vented fires burn with the same level of oxygen.

• Vented fires decrease in intensity before unvented.

• Unvented fires burn at higher temperatures than vented fires.

• Vented fires burn at higher temperatures than unvented fires.

What is identified in the picture?

• Point of origin

•   Pyrolytic exposure

• Line of demarcation

• Soot meridian

• Line of heat wave

Which of the following best describes the area of origin?

• V-shaped pattern formed by thermal plume

• Char and soot damage is heaviest in the area of origin

•   It is the only area that is burned in the room

• There is no furniture left in the area where the fire started

•   There is a hole in the floor at the point of origin

What was the cause of the fire in the mystery investigation?

• Toaster

• Cabinet

• Various electronics

• Coffee maker

• Stove top