BMI Quiz
Questions: 16 · 10 minutes
1. A muscular athlete has a BMI above the standard healthy-weight range. What can reasonably be concluded from BMI alone?
The athlete necessarily has excess body fat
The result may reflect greater muscle mass, so BMI alone cannot determine body composition
The athlete has a weight-related medical condition
BMI automatically decreases when fitness improves
2. Why is BMI generally described as a screening measure rather than a diagnosis?
It does not directly assess body composition, fat distribution, or individual health context
It cannot be calculated outside a medical setting
It is useful only when a person has symptoms
It measures fitness but not weight-related health
3. Why might a clinician consider waist circumference or other information alongside BMI?
Waist circumference converts BMI into a body-fat percentage
It can add information about central fat distribution that BMI does not show
Waist circumference replaces the need to consider symptoms or medical history
BMI is valid only when waist circumference is unavailable
4. Which calculation gives BMI when weight is measured in kilograms and height in metres?
Divide weight by the square of height
Divide weight by height without squaring it
Divide the square of height by weight
Multiply weight by the square of height
5. Using widely used standard adult categories, how is a BMI of 27 classified?
Underweight
Within the standard healthy-weight range
Obesity
Overweight
6. If an adult's weight increases by 10% while their height stays unchanged, how does their BMI change?
It increases by about 5%
It does not change because height is unchanged
It increases by 10%
It increases by 20% because height is squared
7. What does BMI stand for?
Body mass intake
Body measurement indicator
Basal metabolism index
Body mass index
8. An adult weighs 70 kg and is 1.75 m tall. What is their approximate BMI?
22.9
20.0
17.5
27.1
9. What does BMI directly express?
The percentage of body weight that is fat
The amount of fat surrounding internal organs
Weight in relation to height
A person's daily energy requirement
10. After several months of strength training, a person's weight and height are unchanged, but they have gained muscle and lost fat. What happens to their BMI?
It rises because muscle is denser than fat
It falls because body fat has decreased
It cannot be calculated after body composition changes
It remains the same because BMI uses only weight and height
11. An adult has a BMI within the standard healthy-weight range but has experienced rapid, unintentional weight loss. What is the best response?
Assume there is no concern because the current BMI is within range
Wait until the BMI crosses a category boundary
Seek professional guidance because symptoms and weight trends matter independently of the current BMI
Use BMI alone to determine the cause
12. A person enters a height of 175 into a metric BMI formula that expects metres. What should they do?
Convert 175 cm to 1.75 m before squaring the height
Divide 175 by the person's weight before using the formula
Square 175 and then convert the final BMI to metres
Use 175 directly because centimetres and metres give the same result
13. Someone is pregnant and notices that their calculated BMI is rising. What is the most accurate interpretation?
The increase directly shows that body fat is rising at the same rate
BMI becomes a direct measure of pregnancy health
Standard BMI interpretation is limited during pregnancy because expected body changes affect weight
The adult BMI categories should be made stricter during pregnancy
14. How is BMI usually interpreted for children and teenagers?
By subtracting age from the calculated adult BMI
By using the adult categories without adjustment
By comparing BMI only with the child's previous weight
By considering BMI relative to age- and sex-specific growth references
15. Person A weighs 80 kg and is 2.00 m tall. Person B weighs 60 kg and is 1.50 m tall. Who has the higher BMI?
Person A, because 80 kg is the greater weight
Person B, because their BMI is about 26.7 compared with Person A's 20.0
They have the same BMI because their weights are proportional to their heights
It cannot be determined without knowing their body-fat percentages
16. Two adults have the same weight, but one is taller. All else equal, who has the lower BMI?
The shorter adult
The taller adult
They necessarily have identical BMIs
It cannot be determined without their ages