CES CES Emergency Response & Incident Management 2

Question 1

What is the standard waiting time before approaching a misfired electric blast?

Accepted Answer

At least 30 minutes after the last attempt to fire, with the blasting machine disconnected and shorting clips applied to lead wires

Answer

Industry standards and ATF guidelines require waiting at least 30 minutes before approaching a misfired electric blast, with the circuit shunted to prevent stray current ignition.

Question 2

Which federal agency has primary jurisdiction over investigating explosive-related incidents at commercial mines?

Accepted Answer

Mine Safety and Health Administration (MSHA)

Answer

MSHA has jurisdiction over explosives incidents at mining operations under the Federal Mine Safety and Health Act, and is required to investigate fatal or serious injury events.

Question 3

What personal protective equipment (PPE) is specifically important when handling post-blast fumes and residues in an underground blast area?

Accepted Answer

Respiratory protection (SCBA or supplied air) to protect against toxic nitrogen oxide and carbon monoxide fumes

Answer

Post-blast gases including NOx and CO are toxic and may accumulate in underground excavations, requiring respiratory protection before re-entry.

Question 4

What is the purpose of 'hot seat' or 'blow-out' monitoring after an unexploded ordnance (UXO) encounter on a construction site?

Accepted Answer

To ensure UXO items are identified, marked, and the area evacuated before a licensed EOD specialist responds

Answer

When UXO is encountered, work stops immediately, the area is marked and evacuated, and a licensed EOD contractor is called — never attempt to move or disarm UXO without specialized training.

Question 5

Which NFPA standard provides guidance on emergency response to explosives incidents at storage magazines?

Accepted Answer

NFPA 495: Explosive Materials Code, which includes storage, safety distances, and emergency procedures

Answer

NFPA 495 governs the manufacture, transportation, distribution, storage, and use of explosive materials and includes emergency procedures for magazine incidents.

(CES) Certified Explosives Specialist Practice Test

(CES) Certified Explosives Specialist Practice Test

CES CES Emergency Response & Incident Management 2