CES Fundamentals & Core Principles 3

Question 1

What is the Von Neumann spike in the context of detonation physics?

Accepted Answer

The peak pressure immediately behind the shock front before chemical reaction completes

Answer

The Von Neumann spike is the extremely high pressure spike at the leading shock front of a detonation, just ahead of the reaction zone.

Question 2

Which regulatory agency primarily governs the manufacture, storage, and transportation of commercial explosives in the United States?

Accepted Answer

ATF

Answer

The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) has primary jurisdiction over licensing, storage, and record-keeping for commercial explosives under 18 U.S.C. Chapter 40.

Question 3

What is meant by the 'sympathetic detonation' of an explosive?

Accepted Answer

Detonation triggered by the shock wave from an adjacent detonating charge

Answer

Sympathetic detonation occurs when the shock wave from one detonating explosive initiates an adjacent explosive without direct contact.

Question 4

What is the purpose of stemming in a blasting operation?

Accepted Answer

To confine the explosive gases and increase energy coupling to the rock

Answer

Stemming confines the detonation gases within the borehole, improving energy transfer to the surrounding rock and reducing airblast.

Question 5

Which factor most directly determines the stand-off distance required between an explosive magazine and inhabited buildings?

Accepted Answer

The maximum quantity-distance (Q-D) tables based on net explosive weight

Answer

Quantity-distance (Q-D) tables correlate the net explosive weight (NEW) stored to required separation distances from structures and public areas.

(CES) Certified Explosives Specialist Practice Test

(CES) Certified Explosives Specialist Practice Test

CES Fundamentals & Core Principles 3