HESI A2 Reading Comprehension V1 & V2 | Latest
Update 2026/2027 | 200 Practice Questions &
Detailed Answers | Actual Q&A with Verified
Answers | A+ Graded
SECTION 1: MAIN IDEA AND SUPPORTING DETAILS (Questions 1–40)
1. The main idea of a passage is best defined as:
A. The topic sentence of the first paragraph
B. The central point the author wants to convey
C. The most interesting fact in the text
D. The concluding statement of the final paragraph
Answer: B. The central point the author wants to convey
Rationale: The main idea represents the overarching message or primary concept the author intends to
communicate throughout the passage. While it may appear in topic or concluding sentences, it is not
confined to a single location and encompasses the entire text's purpose.
2. Which of the following would be considered a supporting detail rather than the main idea?
A. The significance of climate change on global ecosystems
B. Rising temperatures cause polar ice caps to melt
C. Human activities impact the environment
D. Climate change presents unprecedented challenges
Answer: B. Rising temperatures cause polar ice caps to melt
Rationale: This statement provides specific evidence that supports the broader main idea about climate
change's impact. Supporting details offer concrete examples, facts, or data that substantiate the central
claim of the passage.
,3. When identifying the main idea, which question should the reader ask?
A. What is the author's favorite topic?
B. What is the passage mostly about?
C. How many paragraphs are in the text?
D. Who published this article?
Answer: B. What is the passage mostly about?
Rationale: Asking what the passage is mostly about helps readers distinguish between the central theme
and peripheral information. This question directs attention to the overarching concept rather than
minor details or structural elements.
4. In a passage about the benefits of exercise, which sentence likely contains the main idea?
A. Running burns approximately 100 calories per mile
B. Regular physical activity improves cardiovascular health
C. Many people enjoy morning workouts
D. Exercise equipment can be expensive
Answer: B. Regular physical activity improves cardiovascular health
Rationale: This statement presents a broad claim about exercise's benefits that can be supported by
specific details. The other options provide supporting evidence, personal preferences, or tangential
information rather than the central thesis.
5. Supporting details in a passage serve which primary function?
A. To confuse the reader
B. To provide evidence and clarification
C. To lengthen the text
D. To introduce new topics
Answer: B. To provide evidence and clarification
,Rationale: Supporting details substantiate the main idea by offering facts, examples, statistics, or
explanations that clarify and reinforce the central point.
6. A passage states: "Regular exercise improves cardiovascular health by strengthening the heart muscle
and improving blood circulation." What is the main idea?
A. Exercise strengthens the heart
B. Regular exercise improves cardiovascular health
C. Blood circulation is important
D. The heart muscle needs exercise
Answer: B. Regular exercise improves cardiovascular health
Rationale: The sentence presents a broad claim about exercise's benefit to cardiovascular health. The
other statements are supporting details that explain how this improvement occurs.
7. In the passage about hand hygiene, what is the most effective method for preventing
healthcareassociated infections?
A. Wearing sterile gloves at all times
B. Isolating all infected patients
C. Performing proper hand hygiene
D. Using strong disinfectants on surfaces
Answer: C. Performing proper hand hygiene
Rationale: The passage explicitly states that "proper hand hygiene remains the single most effective
intervention for preventing pathogen transmission." Options A, B, and D are not mentioned as the most
effective method.
8. What is the primary purpose of the inflammatory response described in the passage?
A. To permanently repair damaged tissue within minutes
B. To prevent all types of infections from entering the body
C. To protect the body by initiating a localized response to injury
D. To increase carbon dioxide levels in the blood
, Answer: C. To protect the body by initiating a localized response to injury
Rationale: The passage states that inflammation is a "protective process" triggered by injury, involving
vessel dilation and white blood cell migration to the affected area. Option A is incorrect because repair
is not immediate or permanent; Option B is too absolute ("prevent all"); Option D is unrelated to
inflammation.
9. Based on the rainforest passage, what is one consequence of cutting down trees?
A. Decreased oxygen production
B. Reduced global warming
C. Lower carbon dioxide levels
D. Increased rainfall in the Amazon
Answer: A. Decreased oxygen production
Rationale: The passage explains that trees "take in carbon dioxide and give off oxygen," so cutting them
reduces oxygen release and increases CO₂, which contributes to warming. Options B and C are opposite
of the text; D is not mentioned.
10. According to the passage on hypertension, why is it called the "silent killer"?
A. Because it causes sudden death
B. Because it has no symptoms
C. Because it affects millions of people
D. Because it is not detectable
Answer: B. Because it has no symptoms
Rationale: The passage states that hypertension is called the "silent killer" because it has no symptoms.
Regular blood pressure screening is essential for early detection.
11. Read the passage: "The nurse carefully measured the medication, doublechecked the dosage, and
administered it to the patient. The patient's vital signs improved within 30 minutes." What is the main
idea?
A. The nurse measured medication
Update 2026/2027 | 200 Practice Questions &
Detailed Answers | Actual Q&A with Verified
Answers | A+ Graded
SECTION 1: MAIN IDEA AND SUPPORTING DETAILS (Questions 1–40)
1. The main idea of a passage is best defined as:
A. The topic sentence of the first paragraph
B. The central point the author wants to convey
C. The most interesting fact in the text
D. The concluding statement of the final paragraph
Answer: B. The central point the author wants to convey
Rationale: The main idea represents the overarching message or primary concept the author intends to
communicate throughout the passage. While it may appear in topic or concluding sentences, it is not
confined to a single location and encompasses the entire text's purpose.
2. Which of the following would be considered a supporting detail rather than the main idea?
A. The significance of climate change on global ecosystems
B. Rising temperatures cause polar ice caps to melt
C. Human activities impact the environment
D. Climate change presents unprecedented challenges
Answer: B. Rising temperatures cause polar ice caps to melt
Rationale: This statement provides specific evidence that supports the broader main idea about climate
change's impact. Supporting details offer concrete examples, facts, or data that substantiate the central
claim of the passage.
,3. When identifying the main idea, which question should the reader ask?
A. What is the author's favorite topic?
B. What is the passage mostly about?
C. How many paragraphs are in the text?
D. Who published this article?
Answer: B. What is the passage mostly about?
Rationale: Asking what the passage is mostly about helps readers distinguish between the central theme
and peripheral information. This question directs attention to the overarching concept rather than
minor details or structural elements.
4. In a passage about the benefits of exercise, which sentence likely contains the main idea?
A. Running burns approximately 100 calories per mile
B. Regular physical activity improves cardiovascular health
C. Many people enjoy morning workouts
D. Exercise equipment can be expensive
Answer: B. Regular physical activity improves cardiovascular health
Rationale: This statement presents a broad claim about exercise's benefits that can be supported by
specific details. The other options provide supporting evidence, personal preferences, or tangential
information rather than the central thesis.
5. Supporting details in a passage serve which primary function?
A. To confuse the reader
B. To provide evidence and clarification
C. To lengthen the text
D. To introduce new topics
Answer: B. To provide evidence and clarification
,Rationale: Supporting details substantiate the main idea by offering facts, examples, statistics, or
explanations that clarify and reinforce the central point.
6. A passage states: "Regular exercise improves cardiovascular health by strengthening the heart muscle
and improving blood circulation." What is the main idea?
A. Exercise strengthens the heart
B. Regular exercise improves cardiovascular health
C. Blood circulation is important
D. The heart muscle needs exercise
Answer: B. Regular exercise improves cardiovascular health
Rationale: The sentence presents a broad claim about exercise's benefit to cardiovascular health. The
other statements are supporting details that explain how this improvement occurs.
7. In the passage about hand hygiene, what is the most effective method for preventing
healthcareassociated infections?
A. Wearing sterile gloves at all times
B. Isolating all infected patients
C. Performing proper hand hygiene
D. Using strong disinfectants on surfaces
Answer: C. Performing proper hand hygiene
Rationale: The passage explicitly states that "proper hand hygiene remains the single most effective
intervention for preventing pathogen transmission." Options A, B, and D are not mentioned as the most
effective method.
8. What is the primary purpose of the inflammatory response described in the passage?
A. To permanently repair damaged tissue within minutes
B. To prevent all types of infections from entering the body
C. To protect the body by initiating a localized response to injury
D. To increase carbon dioxide levels in the blood
, Answer: C. To protect the body by initiating a localized response to injury
Rationale: The passage states that inflammation is a "protective process" triggered by injury, involving
vessel dilation and white blood cell migration to the affected area. Option A is incorrect because repair
is not immediate or permanent; Option B is too absolute ("prevent all"); Option D is unrelated to
inflammation.
9. Based on the rainforest passage, what is one consequence of cutting down trees?
A. Decreased oxygen production
B. Reduced global warming
C. Lower carbon dioxide levels
D. Increased rainfall in the Amazon
Answer: A. Decreased oxygen production
Rationale: The passage explains that trees "take in carbon dioxide and give off oxygen," so cutting them
reduces oxygen release and increases CO₂, which contributes to warming. Options B and C are opposite
of the text; D is not mentioned.
10. According to the passage on hypertension, why is it called the "silent killer"?
A. Because it causes sudden death
B. Because it has no symptoms
C. Because it affects millions of people
D. Because it is not detectable
Answer: B. Because it has no symptoms
Rationale: The passage states that hypertension is called the "silent killer" because it has no symptoms.
Regular blood pressure screening is essential for early detection.
11. Read the passage: "The nurse carefully measured the medication, doublechecked the dosage, and
administered it to the patient. The patient's vital signs improved within 30 minutes." What is the main
idea?
A. The nurse measured medication
