SEMPER FIT NUTRITION EXAM
MarineNet-Aligned Practice Edition | 2025
70 Multiple-Choice Questions with Answers and Rationales
Original practice material — not actual or official MarineNet exam questions.
This is not an official exam or answer key and does not guarantee a passing grade. It is an
original study resource based on public Marine Corps nutrition and body-composition materials,
DoD supplement-safety guidance, and general nutrition science.
2025 policy basis: MCO 6110.3A with Administrative Change 4, DoD supplement guidance, and
official Semper Fit performance-nutrition resources. Follow current orders, medical guidance,
and OPSS notices.
Page 1 of 30
,Table of Contents
Section 1: Nutrition Fundamentals & Macronutrients (Questions 1–10) ...................................... 3
Section 2: Micronutrients, Hydration & Electrolytes (Questions 11–20) ...................................... 7
Section 3: Energy Balance, Body Composition & Weight Management (Questions 21–30)
...................................... 11
Section 4: Performance Nutrition & Nutrient Timing (Questions 31–40) ...................................... 15
Section 5: Supplements, Ergogenic Aids & Safety (Questions 41–50) ...................................... 19
Section 6: Operational Rations, Field Feeding & Austere Environments (Questions 51–60)
...................................... 23
Section 7: USMC Nutrition Standards, Education & Command Nutrition Leadership (Questions
61–70) ...................................... 27
Page 2 of 30
, Section 1: Nutrition Fundamentals & Macronutrients (Questions 1–10)
Q1: A Marine prepares for a long field movement and asks which macronutrient is the
main readily available fuel for moderate-to-high intensity work. Which is best?
A. Dietary fiber
B. Protein
C. Water
D. Carbohydrate [CORRECT]
Correct Answer: D
Rationale: Carbohydrate supports blood glucose and muscle glycogen, important fuels for
demanding activity; protein and fiber are not the body’s primary rapid exercise fuel. The other
options either misstate nutrition science or omit an important safety or mission consideration.
Q2: A Marine asks how many kilocalories are supplied per gram of carbohydrate, protein,
and fat, respectively. Which is correct?
A. About 4, 9, and 4 kcal per gram
B. About 9, 4, and 4 kcal per gram
C. About 4, 4, and 9 kcal per gram [CORRECT]
D. All provide about 4 kcal per gram
Correct Answer: C
Rationale: Carbohydrate and protein each provide about 4 kcal per gram, while fat provides
about 9; the other choices assign energy values incorrectly. The other options either misstate
nutrition science or omit an important safety or mission consideration.
Q3: A Marine is increasing protein intake to recover from strength training. What is
protein’s central role?
A. Provides amino acids for tissue repair, enzymes, and other body proteins [CORRECT]
B. Provides no energy and has no structural role
C. Directly supplies oxygen to working muscle
D. Replaces all carbohydrate used during hard exercise
Correct Answer: A
Rationale: Protein supplies amino acids for repair and many body functions; it is not a
substitute for carbohydrate or the oxygen-carrying role of hemoglobin. The other options either
misstate nutrition science or omit an important safety or mission consideration.
Page 3 of 30
MarineNet-Aligned Practice Edition | 2025
70 Multiple-Choice Questions with Answers and Rationales
Original practice material — not actual or official MarineNet exam questions.
This is not an official exam or answer key and does not guarantee a passing grade. It is an
original study resource based on public Marine Corps nutrition and body-composition materials,
DoD supplement-safety guidance, and general nutrition science.
2025 policy basis: MCO 6110.3A with Administrative Change 4, DoD supplement guidance, and
official Semper Fit performance-nutrition resources. Follow current orders, medical guidance,
and OPSS notices.
Page 1 of 30
,Table of Contents
Section 1: Nutrition Fundamentals & Macronutrients (Questions 1–10) ...................................... 3
Section 2: Micronutrients, Hydration & Electrolytes (Questions 11–20) ...................................... 7
Section 3: Energy Balance, Body Composition & Weight Management (Questions 21–30)
...................................... 11
Section 4: Performance Nutrition & Nutrient Timing (Questions 31–40) ...................................... 15
Section 5: Supplements, Ergogenic Aids & Safety (Questions 41–50) ...................................... 19
Section 6: Operational Rations, Field Feeding & Austere Environments (Questions 51–60)
...................................... 23
Section 7: USMC Nutrition Standards, Education & Command Nutrition Leadership (Questions
61–70) ...................................... 27
Page 2 of 30
, Section 1: Nutrition Fundamentals & Macronutrients (Questions 1–10)
Q1: A Marine prepares for a long field movement and asks which macronutrient is the
main readily available fuel for moderate-to-high intensity work. Which is best?
A. Dietary fiber
B. Protein
C. Water
D. Carbohydrate [CORRECT]
Correct Answer: D
Rationale: Carbohydrate supports blood glucose and muscle glycogen, important fuels for
demanding activity; protein and fiber are not the body’s primary rapid exercise fuel. The other
options either misstate nutrition science or omit an important safety or mission consideration.
Q2: A Marine asks how many kilocalories are supplied per gram of carbohydrate, protein,
and fat, respectively. Which is correct?
A. About 4, 9, and 4 kcal per gram
B. About 9, 4, and 4 kcal per gram
C. About 4, 4, and 9 kcal per gram [CORRECT]
D. All provide about 4 kcal per gram
Correct Answer: C
Rationale: Carbohydrate and protein each provide about 4 kcal per gram, while fat provides
about 9; the other choices assign energy values incorrectly. The other options either misstate
nutrition science or omit an important safety or mission consideration.
Q3: A Marine is increasing protein intake to recover from strength training. What is
protein’s central role?
A. Provides amino acids for tissue repair, enzymes, and other body proteins [CORRECT]
B. Provides no energy and has no structural role
C. Directly supplies oxygen to working muscle
D. Replaces all carbohydrate used during hard exercise
Correct Answer: A
Rationale: Protein supplies amino acids for repair and many body functions; it is not a
substitute for carbohydrate or the oxygen-carrying role of hemoglobin. The other options either
misstate nutrition science or omit an important safety or mission consideration.
Page 3 of 30
