AMMO 18 EXAMS SCRIPT 2026 QUESTIONS AND
ANSWERS SURE A+
✔✔HC/D 1.1 - ✔✔Mass explosion hazard - bombs and 155mm projectiles
✔✔HC/D 1.2 - ✔✔Fragmentation hazard - fuzes and 20mm cartridges
✔✔HC/D 1.3 - ✔✔Fire hazard - propellant, artillery charges
✔✔HC/D 1.4 - ✔✔Moderate fire hazard - small arms ammunition, smoke or flash-bang
grenades
✔✔HC/D 1.5 - ✔✔Very insensitive explosives - blasting agents
There are currently no Navy explosives classified as HC/D 1.5
✔✔HC/D 1.6 - ✔✔Extremely insensitive articles - no mass explosive hazard
HC/D 1.6 materials are not used by the military.
✔✔Group A - Storage Compatibility Group - ✔✔Group A includes initiating (primary)
explosives. Bulk initiating explosives that have the necessary sensitivity to heat, friction,
or percussion to make them suitable for use as initiating elements in an explosive train.
Examples: Wet or dry lead azide, wet or dry lead styphnate, wet or dry mercury
fulminate, and dry PETN.
✔✔Group B - Storage Compatibility Group - ✔✔Group B includes detonators and
similar initiating devices that do not contain two or more independent safety features.
Also included in this group are items that contain initiating (primary) high explosives
designed to start or continue the functioning of an explosive train
, ✔✔Group C - Storage Compatibility Group - ✔✔Group C includes bulk propellants,
propelling charges, and devices containing propellant.
✔✔Group D - Storage Compatibility Group - ✔✔Group D includes bulk black powder,
bulk secondary HE, and ammunition containing secondary HE without a propelling
charge and without its own means of initiation (i.e., initiating device is present or the
device has two or more effective protective features).
✔✔Group E - Storage Compatibility Group - ✔✔Group E includes ammunition and
explosives containing HE (secondary explosives) without its own means of initiation and
either containing, or with, a solid propelling charge.
✔✔Group F - Storage Compatibility Group - ✔✔Group F includes ammunition and
explosives containing HE with its own means of initiation (i.e., the initiating device
present has less than two effective protective features, and with or without a solid
propelling charge.)
✔✔Group G - Storage Compatibility Group - ✔✔Group G includes pyrotechnics,
fireworks, illuminating, incendiary, smoke (excluding white phosphorous), and tear
producing agents
✔✔Group H - Storage Compatibility Group - ✔✔Group H includes ammunition
containing both explosives and white phosphorous or other material that is
spontaneously combustible on contact with the atmosphere.
✔✔Group J - Storage Compatibility Group - ✔✔Group J includes ammunition that
contains both explosives and flammable liquid or gels.
✔✔Group K - Storage Compatibility Group - ✔✔Group K includes ammunition
containing both explosives and toxic chemical agents specifically designed for
incapacitating effects more severe than lachrymation. Examples: artillery or mortar
(fuzed or un-fuzed), grenades, and rockets or bombs filled with a lethal or incapacitating
chemical agent.
✔✔Group L - Storage Compatibility Group - ✔✔Group L includes ammunition not
included in other compatibility groups, having characteristics that present a special risk
that does not permit storage with other types of AE, other kinds of explosives, or
dissimilar AE. Includes damaged or suspect ammunition from any group.
✔✔Group N - Storage Compatibility Group - ✔✔Group N includes ammunition
containing only extremely insensitive detonating substance (EIDS). Storage
compatibility group N does not currently exist in U.S. inventory.
ANSWERS SURE A+
✔✔HC/D 1.1 - ✔✔Mass explosion hazard - bombs and 155mm projectiles
✔✔HC/D 1.2 - ✔✔Fragmentation hazard - fuzes and 20mm cartridges
✔✔HC/D 1.3 - ✔✔Fire hazard - propellant, artillery charges
✔✔HC/D 1.4 - ✔✔Moderate fire hazard - small arms ammunition, smoke or flash-bang
grenades
✔✔HC/D 1.5 - ✔✔Very insensitive explosives - blasting agents
There are currently no Navy explosives classified as HC/D 1.5
✔✔HC/D 1.6 - ✔✔Extremely insensitive articles - no mass explosive hazard
HC/D 1.6 materials are not used by the military.
✔✔Group A - Storage Compatibility Group - ✔✔Group A includes initiating (primary)
explosives. Bulk initiating explosives that have the necessary sensitivity to heat, friction,
or percussion to make them suitable for use as initiating elements in an explosive train.
Examples: Wet or dry lead azide, wet or dry lead styphnate, wet or dry mercury
fulminate, and dry PETN.
✔✔Group B - Storage Compatibility Group - ✔✔Group B includes detonators and
similar initiating devices that do not contain two or more independent safety features.
Also included in this group are items that contain initiating (primary) high explosives
designed to start or continue the functioning of an explosive train
, ✔✔Group C - Storage Compatibility Group - ✔✔Group C includes bulk propellants,
propelling charges, and devices containing propellant.
✔✔Group D - Storage Compatibility Group - ✔✔Group D includes bulk black powder,
bulk secondary HE, and ammunition containing secondary HE without a propelling
charge and without its own means of initiation (i.e., initiating device is present or the
device has two or more effective protective features).
✔✔Group E - Storage Compatibility Group - ✔✔Group E includes ammunition and
explosives containing HE (secondary explosives) without its own means of initiation and
either containing, or with, a solid propelling charge.
✔✔Group F - Storage Compatibility Group - ✔✔Group F includes ammunition and
explosives containing HE with its own means of initiation (i.e., the initiating device
present has less than two effective protective features, and with or without a solid
propelling charge.)
✔✔Group G - Storage Compatibility Group - ✔✔Group G includes pyrotechnics,
fireworks, illuminating, incendiary, smoke (excluding white phosphorous), and tear
producing agents
✔✔Group H - Storage Compatibility Group - ✔✔Group H includes ammunition
containing both explosives and white phosphorous or other material that is
spontaneously combustible on contact with the atmosphere.
✔✔Group J - Storage Compatibility Group - ✔✔Group J includes ammunition that
contains both explosives and flammable liquid or gels.
✔✔Group K - Storage Compatibility Group - ✔✔Group K includes ammunition
containing both explosives and toxic chemical agents specifically designed for
incapacitating effects more severe than lachrymation. Examples: artillery or mortar
(fuzed or un-fuzed), grenades, and rockets or bombs filled with a lethal or incapacitating
chemical agent.
✔✔Group L - Storage Compatibility Group - ✔✔Group L includes ammunition not
included in other compatibility groups, having characteristics that present a special risk
that does not permit storage with other types of AE, other kinds of explosives, or
dissimilar AE. Includes damaged or suspect ammunition from any group.
✔✔Group N - Storage Compatibility Group - ✔✔Group N includes ammunition
containing only extremely insensitive detonating substance (EIDS). Storage
compatibility group N does not currently exist in U.S. inventory.
