FDNY E10 Blaster All Purpose Exam

FDNY E10 Blaster (All Purpose) Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of an FDNY E10 Blaster Certificate of

Fitness?

• To allow unrestricted demolition in NYC
• To authorize the safe handling and use of explosives
• To ensure individuals meet safety, knowledge, and legal requirements

for blasting operations

• To supervise structural collapse operations

Rationale: The Certificate of Fitness confirms the holder understands legal

and safety requirements for explosive use.

• Which authority regulates blasting operations in New York City?
• Department of Buildings only

B. NYPD

C. FDNY 1 / 4

• U.S. Department of Labor

Rationale: FDNY is the primary authority governing explosive safety and

blasting operations in NYC.

• Blasting caps are primarily used for what purpose?
• Ground stabilization
• Dust control
• Initiating explosive charges
• Waterproofing detonators

Rationale: Blasting caps are designed to initiate the detonation sequence.

• Which document must be present at a blasting site at all times?
• Employee attendance lists
• Approved blasting permit
• Crew meal vouchers
• Manufacturer’s explosives catalog

Rationale: FDNY requires the approved blasting permit to be on site for

inspection.

• What is the maximum number of people allowed in a blast area during

detonation?

• 20
• 10
• Only essential authorized personnel
• No limit with PPE 2 / 4

Rationale: Only essential crew members directly involved may remain in

the blast area.

• Which of the following best describes ANFO?
• Liquid-based detonator
• Electric delay system
• Ammonium nitrate/fuel oil mixture
• Primary explosive

Rationale: ANFO is a common industrial blasting agent composed of

ammonium nitrate and fuel.

• A misfire must be treated as what?
• A routine delay
• An emergency requiring hazard control and investigation
• A scheduling inconvenience
• A permit violation

Rationale: Misfires pose serious danger and must be investigated and

controlled per FDNY protocols.

• When must blasting warning signals be used?
• Only during night-time blasting
• Only when pedestrians are present
• Before, during, and after detonation
• Only when using electric caps

Rationale: Standard blasting signals warn everyone in the vicinity. 3 / 4

• The “all-clear” signal is used for what purpose?
• Start loading holes
• Notify FDNY
• Indicate the area is safe to enter after blasting
• Start drill operations

Rationale: The all-clear declares that post-blast inspection is complete and

safe.

• Which type of explosive is most sensitive to shock and friction?

A. ANFO

• Water gel
• Primary explosives
• Slurry explosives

Rationale: Primary explosives are highly sensitive and used in detonators.

• Which is required when transporting explosives within NYC?
• Personal vehicle
• Open-bed trucks
• FDNY-permitted vehicle
• Taxi service

Rationale: Specially permitted vehicles ensure controlled, legal transport.

• Blasting mats are used for what purpose?
• Noise enhancement
• Speeding up detonation
• / 4