US ARMY EXPLOSIVE SAFETY FAMILIARIZATION EXAM
2026/2027 | 100% Correct Answers with Complete Solutions |
AR 385-64 & DoD Ammunition Safety Standards | Pass
Guaranteed - A+ Graded
Domain 1: Explosive Safety Fundamentals (15 Questions)
Q1: A military ammunition storage area is being established near a populated area.
Which principle of explosive safety requires that the potential damage from an
accidental explosion be limited by controlling the quantity of explosives and the
distance between storage locations and exposed sites?
A. Inherent safety design through engineering controls
B. Quantity-Distance (Q-D) principle [CORRECT]
C. Administrative controls through standard operating procedures
D. Personal protective equipment utilization
Correct Answer: B
Rationale: The Quantity-Distance (Q-D) principle is the fundamental concept in explosive
safety that limits the quantity of explosives stored or handled at any one location and
establishes minimum separation distances between explosive locations and exposed
sites (personnel, facilities, public traffic routes). This principle is codified in AR 385-64,
Chapter 5, and DoD 6055.09-M, Volume 1, which establish specific Q-D tables based on
hazard classification and NEW (Net Explosive Weight).
Why distractors are incorrect:
● A: While engineering controls are important, inherent safety design is not the
specific principle governing separation distances and quantity limitations.
, ● C: Administrative controls supplement but do not replace Q-D requirements; they
cannot substitute for physical separation.
● D: PPE is the last line of defense and provides no protection against blast
overpressure, fragmentation, or thermal effects from significant explosive
detonations.
Q2: During a safety inspection, an EOD technician identifies an area where HD 1.1
materials are stored without proper separation from HD 1.3 materials. According to AR
385-64, what is the primary hazard associated with HD 1.1 materials that necessitates
strict Q-D compliance?
A. Mass detonation with blast overpressure, fragmentation, and thermal effects capable
of propagating across entire storage area [CORRECT]
B. Mass fire hazard with minor blast or fragmentation effects limited to immediate
storage location
C. Moderate fire hazard with no blast effects and minimal fragmentation projection
D. Explosion with projection hazard but no mass detonation capability
Correct Answer: A
Rationale: HD 1.1 (Hazard Division 1.1) materials have a mass explosion hazard where
the entire quantity of explosives can detonate essentially simultaneously, producing
blast overpressure, thermal effects, and high-velocity fragments. AR 385-64, Table 5-1
and DoD 6055.09-M, Volume 1, Chapter 2 establish that HD 1.1 requires the greatest
separation distances due to this mass detonation capability. The K-factor (damage
relationship factor) for HD 1.1 is significantly higher than other divisions, requiring
greater distances for equivalent NEW.
Why distractors are incorrect:
● B: Describes HD 1.3 (mass fire hazard), not HD 1.1.
● C: Describes HD 1.4 (moderate fire hazard with no significant blast).
● D: Describes HD 1.2 (explosion with projection hazard but no mass detonation).
,Q3: An ammunition supply point is calculating the Net Explosive Weight (NEW) for a
storage structure containing multiple ammunition items. Which definition of NEW is
correct per AR 385-64 when determining quantity-distance relationships?
A. The total weight of all ammunition items including packaging, containers, and pallets
B. The total weight of explosive material contained in ammunition without packaging,
plus the weight of exposed propellant [CORRECT]
C. The weight of the explosive filler only, excluding all propellants and pyrotechnic
materials
D. The gross weight of the ammunition item as listed in the technical manual
Correct Answer: B
Rationale: Per AR 385-64, Glossary, Section II, NEW is defined as "the total weight of
explosive material expressed in pounds, including the weight of all explosives and
propellants in ammunition, explosives, or explosive devices." This includes the explosive
filler, propellant weight, and pyrotechnic compositions, but excludes packaging,
containers, and inert components. NEW is the critical value used in Q-D calculations
because it represents the actual explosive energy available for detonation. DoD
6055.09-M, Volume 1, Chapter 2 provides detailed guidance on NEW calculations for
mixed hazard storage.
Why distractors are incorrect:
● A: Includes non-explosive packaging weight, which would artificially inflate Q-D
requirements.
● C: Incorrectly excludes propellants, which are significant explosive materials
requiring Q-D consideration.
● D: Gross weight includes inert components and packaging, not representative of
actual explosive hazard.
, Q4: A safety officer is reviewing storage compatibility at an ammunition depot.
According to DoD 6055.09-M, which storage compatibility group consists of articles
containing both a substance from Compatibility Group A (primary explosive) and a
substance from Compatibility Group B (detonator)?
A. Compatibility Group C
B. Compatibility Group D
C. Compatibility Group E [CORRECT]
D. Compatibility Group F
Correct Answer: C
Rationale: Compatibility Group E consists of articles containing both a primary
explosive substance (Group A) and a detonating explosive substance (Group B), such as
certain types of detonators or primers. Per DoD 6055.09-M, Volume 1, Chapter 2, and AR
385-64, Chapter 5, Section III, ammunition items are assigned to 13 compatibility groups
(A through H, J, K, L, N, S) based on their explosive characteristics and storage
compatibility. Group E items require storage segregation considerations because they
combine the sensitivity of primary explosives with the detonation capability of
secondary explosives.
Why distractors are incorrect:
● A: Group C consists of propellant explosives with certain specific characteristics
(bulk bagged propellants).
● B: Group D consists of detonating explosives (secondary explosives) without
primary explosives.
● D: Group F consists of articles containing both a detonating explosive and a
flammable liquid or gel.
Q5: During an explosive safety site plan review, engineers must determine the inhabited
building distance (IBD) for an above-ground magazine storing 10,000 lbs NEW of HD 1.1
2026/2027 | 100% Correct Answers with Complete Solutions |
AR 385-64 & DoD Ammunition Safety Standards | Pass
Guaranteed - A+ Graded
Domain 1: Explosive Safety Fundamentals (15 Questions)
Q1: A military ammunition storage area is being established near a populated area.
Which principle of explosive safety requires that the potential damage from an
accidental explosion be limited by controlling the quantity of explosives and the
distance between storage locations and exposed sites?
A. Inherent safety design through engineering controls
B. Quantity-Distance (Q-D) principle [CORRECT]
C. Administrative controls through standard operating procedures
D. Personal protective equipment utilization
Correct Answer: B
Rationale: The Quantity-Distance (Q-D) principle is the fundamental concept in explosive
safety that limits the quantity of explosives stored or handled at any one location and
establishes minimum separation distances between explosive locations and exposed
sites (personnel, facilities, public traffic routes). This principle is codified in AR 385-64,
Chapter 5, and DoD 6055.09-M, Volume 1, which establish specific Q-D tables based on
hazard classification and NEW (Net Explosive Weight).
Why distractors are incorrect:
● A: While engineering controls are important, inherent safety design is not the
specific principle governing separation distances and quantity limitations.
, ● C: Administrative controls supplement but do not replace Q-D requirements; they
cannot substitute for physical separation.
● D: PPE is the last line of defense and provides no protection against blast
overpressure, fragmentation, or thermal effects from significant explosive
detonations.
Q2: During a safety inspection, an EOD technician identifies an area where HD 1.1
materials are stored without proper separation from HD 1.3 materials. According to AR
385-64, what is the primary hazard associated with HD 1.1 materials that necessitates
strict Q-D compliance?
A. Mass detonation with blast overpressure, fragmentation, and thermal effects capable
of propagating across entire storage area [CORRECT]
B. Mass fire hazard with minor blast or fragmentation effects limited to immediate
storage location
C. Moderate fire hazard with no blast effects and minimal fragmentation projection
D. Explosion with projection hazard but no mass detonation capability
Correct Answer: A
Rationale: HD 1.1 (Hazard Division 1.1) materials have a mass explosion hazard where
the entire quantity of explosives can detonate essentially simultaneously, producing
blast overpressure, thermal effects, and high-velocity fragments. AR 385-64, Table 5-1
and DoD 6055.09-M, Volume 1, Chapter 2 establish that HD 1.1 requires the greatest
separation distances due to this mass detonation capability. The K-factor (damage
relationship factor) for HD 1.1 is significantly higher than other divisions, requiring
greater distances for equivalent NEW.
Why distractors are incorrect:
● B: Describes HD 1.3 (mass fire hazard), not HD 1.1.
● C: Describes HD 1.4 (moderate fire hazard with no significant blast).
● D: Describes HD 1.2 (explosion with projection hazard but no mass detonation).
,Q3: An ammunition supply point is calculating the Net Explosive Weight (NEW) for a
storage structure containing multiple ammunition items. Which definition of NEW is
correct per AR 385-64 when determining quantity-distance relationships?
A. The total weight of all ammunition items including packaging, containers, and pallets
B. The total weight of explosive material contained in ammunition without packaging,
plus the weight of exposed propellant [CORRECT]
C. The weight of the explosive filler only, excluding all propellants and pyrotechnic
materials
D. The gross weight of the ammunition item as listed in the technical manual
Correct Answer: B
Rationale: Per AR 385-64, Glossary, Section II, NEW is defined as "the total weight of
explosive material expressed in pounds, including the weight of all explosives and
propellants in ammunition, explosives, or explosive devices." This includes the explosive
filler, propellant weight, and pyrotechnic compositions, but excludes packaging,
containers, and inert components. NEW is the critical value used in Q-D calculations
because it represents the actual explosive energy available for detonation. DoD
6055.09-M, Volume 1, Chapter 2 provides detailed guidance on NEW calculations for
mixed hazard storage.
Why distractors are incorrect:
● A: Includes non-explosive packaging weight, which would artificially inflate Q-D
requirements.
● C: Incorrectly excludes propellants, which are significant explosive materials
requiring Q-D consideration.
● D: Gross weight includes inert components and packaging, not representative of
actual explosive hazard.
, Q4: A safety officer is reviewing storage compatibility at an ammunition depot.
According to DoD 6055.09-M, which storage compatibility group consists of articles
containing both a substance from Compatibility Group A (primary explosive) and a
substance from Compatibility Group B (detonator)?
A. Compatibility Group C
B. Compatibility Group D
C. Compatibility Group E [CORRECT]
D. Compatibility Group F
Correct Answer: C
Rationale: Compatibility Group E consists of articles containing both a primary
explosive substance (Group A) and a detonating explosive substance (Group B), such as
certain types of detonators or primers. Per DoD 6055.09-M, Volume 1, Chapter 2, and AR
385-64, Chapter 5, Section III, ammunition items are assigned to 13 compatibility groups
(A through H, J, K, L, N, S) based on their explosive characteristics and storage
compatibility. Group E items require storage segregation considerations because they
combine the sensitivity of primary explosives with the detonation capability of
secondary explosives.
Why distractors are incorrect:
● A: Group C consists of propellant explosives with certain specific characteristics
(bulk bagged propellants).
● B: Group D consists of detonating explosives (secondary explosives) without
primary explosives.
● D: Group F consists of articles containing both a detonating explosive and a
flammable liquid or gel.
Q5: During an explosive safety site plan review, engineers must determine the inhabited
building distance (IBD) for an above-ground magazine storing 10,000 lbs NEW of HD 1.1
