Which of the following scenarios could lead

Which of the following scenarios could lead

Subject: Biology    / General Biology
Question

1.

Which of the following scenarios could lead to the phenomenon known as self-ignition?

Bacterial action in a haystack

Lightening striking a house

Faulty wiring in a home

A clock used as a time delay mechanism

Overheating of a car engine

1.

This analytical tool operates on similar principles to liquid chromatography and is gaining use as a tool to analyze explosives.

GC

CE

IR

HPTLC

MS

1.

If a fire that is burning with a limited supply of oxygen is suddenly ventilated, this may occur:

Incomplete combustion

Flame point

Flash point

Explosion

Flashback

1.

Which method of isolating fire residues involves the use of charcoal strips?

Headspace

Adsorption

Absorption

Solvent extraction

Gas chromatography

1.

A paint can has two tubes that can trap accelerants. Air is pumped through one tube into the can; headspace vapors are pulled out through the other tube. What technique does this describe?

Solid phase extraction

Headspace

Thin Layer Chromatography

Adsorption-Elution

Steam distillation

1.

High explosives:

Have detonation rates of 2,000 to 3,000 fps

Take place at optimal efficiency

Require the use of an explosives trains

Include black powder and ANFO

Possess a fuel and oxygen that are chemically combined

1.

Which of the following conditions is not necessary for a fire to occur?

Heat

Oxygen

Fuel

Accerlerant

Chain reaction

1.

Select the true statement.

A high order explosion may occur due to old, out-of-date explosives.

Fragmentation effects are generally the least damaging of the effects of an explosion

A vapor trace analyzer is a type of specialized GC that is optimized for explosives analysis

Black powder is comprised of sulfur nitrate, potassium and charcoal

Explosions are always more damaging than fires

1.

A number of characteristics are used to locate the point of origin of a fire. The destruction of a surface due to heat or other factors is called what?

Low burning

V-patterns burning

Charring

Spalling

Material distortion

1.

Infrared spectrophotometryâ¦

Is similar in some ways to HPLC

Can differentiate TNT and DNT

Provides only a tentative identification

Employs Greiss reagents

Has problems analyzing explosives due to high temperatures