CES Communication & Documentation 3

Question 1

A shot report for a quarry blast should include the specific gravity of the rock being blasted primarily because it affects which calculation?

Accepted Answer

Powder factor and energy requirements

Answer

Rock specific gravity directly influences powder factor calculations and the amount of explosive energy needed to fragment the material.

Question 2

In a seismograph report following a blast, the value most directly used to evaluate potential structural damage to nearby buildings is:

Accepted Answer

Peak particle velocity (PPV)

Answer

Peak particle velocity (PPV) is the standard measurement used to assess ground vibration impact on structures according to USBM RI 8507.

Question 3

A certified explosives specialist discovers a discrepancy between the quantity of explosive received and the quantity recorded in the magazine inventory. The first required action is to:

Accepted Answer

Conduct an internal count and document the discrepancy

Answer

Before any reporting or action, the specialist must conduct a recount and document the discrepancy to establish the accurate facts.

Question 4

Which document serves as the primary legal authorization allowing a licensed explosives user to transport explosives on public roads?

Accepted Answer

The DOT hazmat transportation permit

Answer

DOT hazmat transportation regulations govern the movement of explosives on public roads, and carriers must comply with DOT placarding and permit requirements.

Question 5

When documenting a blast hole pattern in a blaster's log, which measurement is MOST important for post-blast analysis of fragmentation results?

Accepted Answer

Burden and spacing dimensions

Answer

Burden and spacing dimensions directly control fragmentation and are the primary variables analyzed to optimize future blast designs.

(CES) Certified Explosives Specialist Practice Test

(CES) Certified Explosives Specialist Practice Test

CES Communication & Documentation 3