CES Explosive Materials & Chemical Composition

Question 1

What defines a high explosive?

Accepted Answer

They detonate with a supersonic shock wave

Answer

A high explosive is characterized by its ability to detonate, meaning it undergoes a rapid chemical reaction that propagates at a supersonic velocity, creating a powerful shock wave. This shock wave is responsible for the destructive force and shattering effect associated with high explosives. Unlike low explosives, which deflagrate (burn rapidly), high explosives produce a much more intense and localized blast.

Question 2

What is the primary component of TNT?

Accepted Answer

Trinitrotoluene

Answer

TNT stands for Trinitrotoluene, which is its primary chemical component and the source of its explosive properties. It is a well-known chemical compound widely used as an explosive agent in military, industrial, and mining applications. The name itself directly indicates its chemical composition.

Question 3

Why is ammonium nitrate used in explosives?

Accepted Answer

It is a strong oxidizer and cost-effective

Answer

Ammonium nitrate is a strong oxidizer, meaning it readily provides oxygen to fuel combustion, making it a key component in many explosive mixtures like ANFO. Its widespread use is also due to its relatively low cost and availability, making it an economical choice for large-scale blasting operations. While not explosive on its own, it significantly enhances the explosive power of other fuels.

Question 4

What characteristic makes an explosive 'primary'?

Accepted Answer

They are highly sensitive and initiate other explosives

Answer

Primary explosives are highly sensitive compounds that require very little energy to initiate detonation, making them ideal for use as initiators in blasting caps or detonators. Their extreme sensitivity allows them to reliably trigger less sensitive, more powerful secondary explosives. This characteristic is crucial for creating a controlled explosive train.

Question 5

Which chemical is commonly mixed with ammonium nitrate in ANFO?

Accepted Answer

Fuel oil

Answer

ANFO stands for Ammonium Nitrate Fuel Oil, indicating that fuel oil is the other primary component mixed with ammonium nitrate. The fuel oil acts as the combustible material, while ammonium nitrate provides the oxygen for the explosive reaction. This mixture creates a powerful and cost-effective blasting agent widely used in mining and construction.

(CES) Certified Explosives Specialist Practice Test

(CES) Certified Explosives Specialist Practice Test

CES Explosive Materials & Chemical Composition