AMMO-68 MILITARY MUNITIONS RULE
(MMR) PRACTICE EXAM | Military Munitions
Rule - AMMO 68 Answers | Actual Exam Update
| 100% Passed 2026/2027.
Exam Instructions:
Read each question carefully. Select the best answer for multiple-choice questions. For
True/False questions, select either True or False. For Select-All-That-Apply (SATA) questions,
select ALL correct options.
DOMAIN 1: HAZARD CLASSIFICATION & COMPATIBILITY GROUPS (12 Questions)
Sub-Topic: Hazard Division 1.1 vs. Division 1.3 (4 Questions)
Question 1 (Multiple-Choice)
A pallet contains 500 lbs of Composition B-filled artillery shells. During the DOT hazard
classification test, the material demonstrates a mass explosion hazard where the entire
quantity explodes nearly instantaneously. What is the correct Hazard Division classification
for this shipment?
A) Division 1.2 — Projection hazard but not a mass explosion
B) Division 1.3 — Fire and minor blast hazard
C) Division 1.1 — Mass explosion hazard [CORRECT]
D) Division 1.4 — Minor explosion hazard with no significant blast
Rationale: Division 1.1 is defined as substances and articles that have a mass explosion
hazard—a mass explosion being one that affects almost the entire quantity present virtually
instantaneously. This is codified in 49 CFR §173.50(a) and the UN Orange Book classification
system. Composition B, a high explosive filler, exhibits this characteristic.
Question 2 (Multiple-Choice)
A shipment of bulk propellant bags for artillery charges is being classified. During testing, the
material exhibits a fire hazard with minor blast or projection effects, but the blast effects are
confined to the package and no mass explosion occurs. Which Hazard Division applies?
A) Division 1.1 — Mass explosion hazard
,B) Division 1.2 — Projection hazard
C) Division 1.3 — Fire and minor blast/projection hazard [CORRECT]
D) Division 1.4 — No significant hazard
Rationale: Division 1.3 is defined as substances and articles that have a fire hazard and either
a minor blast hazard or a minor projection hazard, or both, but not a mass explosion hazard.
The key distinction from 1.1 is the absence of a mass explosion. This is specified in 49 CFR
§173.50(c) and the UN Recommendations on the Transport of Dangerous Goods.
Question 3 (True/False)
A Division 1.1 material is characterized by a fire hazard with minor blast effects, while a
Division 1.3 material presents a mass explosion hazard where the entire load explodes
simultaneously.
A) True
B) False [CORRECT]
Rationale: This statement is FALSE. The definitions are reversed. Division 1.1 is the mass
explosion hazard (entire quantity explodes nearly instantaneously), while Division 1.3 is the
fire and minor blast hazard. This distinction is critical for storage compatibility, quantity-
distance calculations, and emergency response under 49 CFR §173.50.
Question 4 (Select-All-That-Apply)
Which of the following characteristics distinguish a Division 1.1 (Mass Explosion Hazard) from
a Division 1.3 (Fire and Minor Blast Hazard)? (Select ALL that apply.)
A) Division 1.1 affects almost the entire quantity present virtually instantaneously [CORRECT]
B) Division 1.3 has a fire hazard with either minor blast or minor projection effects, but NOT a
mass explosion [CORRECT]
C) Division 1.1 requires the same storage separation distances as Division 1.3
D) Division 1.3 materials can be stored in the same magazine as Division 1.1 materials without
restriction
E) Division 1.1 materials produce a more severe blast wave than Division 1.3 materials
[CORRECT]
Rationale: The defining characteristics are codified in 49 CFR §173.50. Division 1.1 has a mass
explosion hazard affecting almost the entire quantity instantaneously, producing a severe
, blast wave. Division 1.3 has a fire hazard with minor blast/projection effects but no mass
explosion. Storage compatibility and quantity-distance requirements differ significantly
between these divisions per the ATF Orange Book and DoD 6055.09-STD.
Sub-Topic: Compatibility Group "S" (4 Questions)
Question 5 (Multiple-Choice)
A mixed pallet contains Compatibility Group C propellant charges and Compatibility Group S
practice grenades. According to the ATF Orange Book compatibility tables, why is Group S
permitted to be transported alongside Group C without increasing the overall explosive risk?
A) Group S items are inert and contain no explosive material
B) Group S is packaged to withstand a fire test without a dangerous explosion, allowing safe
mixing with Group C [CORRECT]
C) Group S items are classified as Division 1.6 and pose no hazard
D) Group S compatibility is determined by the net explosive weight only
Rationale: Compatibility Group S is defined as substances and articles that are packaged to
withstand a fire test without a dangerous explosion. This specific packaging characteristic
allows Group S items to be safely mixed with certain other compatibility groups, including
Group C propellants, without increasing the overall explosive risk. This is specified in the UN
Recommendations on the Transport of Dangerous Goods (Orange Book) and adopted in 49
CFR §173.52.
Question 6 (Multiple-Choice)
An ammunition shipment contains Compatibility Group C (propellant) and Compatibility
Group S (packaged articles). Which compatibility group placard must be displayed on the
transport vehicle according to 49 CFR §172.504(g)?
A) Group C only
B) Group S only
C) Group C, because it is the more hazardous compatibility group [CORRECT]
D) Group D, as the mixed compatibility group designation
Rationale: Per 49 CFR §172.504(g)(1), when explosive articles of compatibility groups C, D, or E
are transported together, the placard may display compatibility group E. However, when
mixed with Group S, the primary hazard is determined by the more hazardous group. Group C
(propellant) represents the greater explosive hazard, and the placard must reflect the
(MMR) PRACTICE EXAM | Military Munitions
Rule - AMMO 68 Answers | Actual Exam Update
| 100% Passed 2026/2027.
Exam Instructions:
Read each question carefully. Select the best answer for multiple-choice questions. For
True/False questions, select either True or False. For Select-All-That-Apply (SATA) questions,
select ALL correct options.
DOMAIN 1: HAZARD CLASSIFICATION & COMPATIBILITY GROUPS (12 Questions)
Sub-Topic: Hazard Division 1.1 vs. Division 1.3 (4 Questions)
Question 1 (Multiple-Choice)
A pallet contains 500 lbs of Composition B-filled artillery shells. During the DOT hazard
classification test, the material demonstrates a mass explosion hazard where the entire
quantity explodes nearly instantaneously. What is the correct Hazard Division classification
for this shipment?
A) Division 1.2 — Projection hazard but not a mass explosion
B) Division 1.3 — Fire and minor blast hazard
C) Division 1.1 — Mass explosion hazard [CORRECT]
D) Division 1.4 — Minor explosion hazard with no significant blast
Rationale: Division 1.1 is defined as substances and articles that have a mass explosion
hazard—a mass explosion being one that affects almost the entire quantity present virtually
instantaneously. This is codified in 49 CFR §173.50(a) and the UN Orange Book classification
system. Composition B, a high explosive filler, exhibits this characteristic.
Question 2 (Multiple-Choice)
A shipment of bulk propellant bags for artillery charges is being classified. During testing, the
material exhibits a fire hazard with minor blast or projection effects, but the blast effects are
confined to the package and no mass explosion occurs. Which Hazard Division applies?
A) Division 1.1 — Mass explosion hazard
,B) Division 1.2 — Projection hazard
C) Division 1.3 — Fire and minor blast/projection hazard [CORRECT]
D) Division 1.4 — No significant hazard
Rationale: Division 1.3 is defined as substances and articles that have a fire hazard and either
a minor blast hazard or a minor projection hazard, or both, but not a mass explosion hazard.
The key distinction from 1.1 is the absence of a mass explosion. This is specified in 49 CFR
§173.50(c) and the UN Recommendations on the Transport of Dangerous Goods.
Question 3 (True/False)
A Division 1.1 material is characterized by a fire hazard with minor blast effects, while a
Division 1.3 material presents a mass explosion hazard where the entire load explodes
simultaneously.
A) True
B) False [CORRECT]
Rationale: This statement is FALSE. The definitions are reversed. Division 1.1 is the mass
explosion hazard (entire quantity explodes nearly instantaneously), while Division 1.3 is the
fire and minor blast hazard. This distinction is critical for storage compatibility, quantity-
distance calculations, and emergency response under 49 CFR §173.50.
Question 4 (Select-All-That-Apply)
Which of the following characteristics distinguish a Division 1.1 (Mass Explosion Hazard) from
a Division 1.3 (Fire and Minor Blast Hazard)? (Select ALL that apply.)
A) Division 1.1 affects almost the entire quantity present virtually instantaneously [CORRECT]
B) Division 1.3 has a fire hazard with either minor blast or minor projection effects, but NOT a
mass explosion [CORRECT]
C) Division 1.1 requires the same storage separation distances as Division 1.3
D) Division 1.3 materials can be stored in the same magazine as Division 1.1 materials without
restriction
E) Division 1.1 materials produce a more severe blast wave than Division 1.3 materials
[CORRECT]
Rationale: The defining characteristics are codified in 49 CFR §173.50. Division 1.1 has a mass
explosion hazard affecting almost the entire quantity instantaneously, producing a severe
, blast wave. Division 1.3 has a fire hazard with minor blast/projection effects but no mass
explosion. Storage compatibility and quantity-distance requirements differ significantly
between these divisions per the ATF Orange Book and DoD 6055.09-STD.
Sub-Topic: Compatibility Group "S" (4 Questions)
Question 5 (Multiple-Choice)
A mixed pallet contains Compatibility Group C propellant charges and Compatibility Group S
practice grenades. According to the ATF Orange Book compatibility tables, why is Group S
permitted to be transported alongside Group C without increasing the overall explosive risk?
A) Group S items are inert and contain no explosive material
B) Group S is packaged to withstand a fire test without a dangerous explosion, allowing safe
mixing with Group C [CORRECT]
C) Group S items are classified as Division 1.6 and pose no hazard
D) Group S compatibility is determined by the net explosive weight only
Rationale: Compatibility Group S is defined as substances and articles that are packaged to
withstand a fire test without a dangerous explosion. This specific packaging characteristic
allows Group S items to be safely mixed with certain other compatibility groups, including
Group C propellants, without increasing the overall explosive risk. This is specified in the UN
Recommendations on the Transport of Dangerous Goods (Orange Book) and adopted in 49
CFR §173.52.
Question 6 (Multiple-Choice)
An ammunition shipment contains Compatibility Group C (propellant) and Compatibility
Group S (packaged articles). Which compatibility group placard must be displayed on the
transport vehicle according to 49 CFR §172.504(g)?
A) Group C only
B) Group S only
C) Group C, because it is the more hazardous compatibility group [CORRECT]
D) Group D, as the mixed compatibility group designation
Rationale: Per 49 CFR §172.504(g)(1), when explosive articles of compatibility groups C, D, or E
are transported together, the placard may display compatibility group E. However, when
mixed with Group S, the primary hazard is determined by the more hazardous group. Group C
(propellant) represents the greater explosive hazard, and the placard must reflect the
