Registered Dietetic Technician Test Registered Dietetic Technician Test Food Science & Dietary Planning 2 — Questions and Answers
Question 1: Which type of dietary fiber is most effective at lowering LDL cholesterol?
- Insoluble fiber
- Soluble fiber (Correct answer)
- Resistant starch
- Cellulose
Correct answer: Soluble fiber
Soluble fiber, such as beta-glucan found in oats, forms a gel in the digestive tract that binds bile acids and lowers LDL cholesterol.
Question 2: In food service, the FIFO inventory method stands for:
- First In, First Out (Correct answer)
- Fast Items, Frequent Orders
- First Ingredient, Final Output
- Fixed Inventory, Flexible Orders
Correct answer: First In, First Out
FIFO (First In, First Out) ensures older stock is used before newer stock, reducing spoilage and food waste.
Question 3: Which temperature range is considered the 'danger zone' for bacterial growth in foods according to the USDA?
- 0°F to 32°F (–18°C to 0°C)
- 32°F to 70°F (0°C to 21°C)
- 40°F to 140°F (4°C to 60°C) (Correct answer)
- 140°F to 165°F (60°C to 74°C)
Correct answer: 40°F to 140°F (4°C to 60°C)
The USDA defines the temperature danger zone as 40°F–140°F, where bacteria multiply rapidly in potentially hazardous foods.
Question 4: Which nutrient is the primary fuel source for the brain under normal dietary conditions?
- Fatty acids
- Ketone bodies
- Glucose (Correct answer)
- Amino acids
Correct answer: Glucose
Glucose derived from carbohydrates is the brain's preferred and primary fuel source under normal metabolic conditions.
Question 5: An adequate intake (AI) value is established when:
- Sufficient data exist to set a Recommended Dietary Allowance (RDA)
- Evidence is insufficient to establish an RDA but a value is still needed (Correct answer)
- The nutrient has no known deficiency risk
- The tolerable upper intake level has been exceeded
Correct answer: Evidence is insufficient to establish an RDA but a value is still needed
The AI is used as a reference intake when evidence is too limited to establish a full RDA, based on observed or estimated adequate intakes.
Question 6: Which mineral is a key component of hemoglobin and essential for oxygen transport in red blood cells?
- Zinc
- Copper
- Iron (Correct answer)
- Manganese
Correct answer: Iron
Iron is a central component of the hemoglobin molecule, binding oxygen in the lungs and releasing it to tissues throughout the body.
Registered Dietetic Technician Test Registered Dietetic Technician Test Food Science & Dietary Planning 2
Which type of dietary fiber is most effective at lowering LDL cholesterol?