HESI A2 Sample Questions
Mathematics
- What is 3/8 as a decimal?
a) 0.375
b) 0.325
c) 0.425
d) 0.475
Explanation: To convert 3/8 to a decimal, divide 3 by 8. 3 ÷ 8 = 0.375.
- A patient needs 500 mg of a medication. The medication is available in 250 mg tablets. How many tablets should be given?
a) 1 tablet
b) 2 tablets
c) 3 tablets
d) 4 tablets
Explanation: Divide the required dose (500 mg) by the tablet strength (250 mg): 500 ÷ 250 = 2 tablets.
- If a nurse works 36 hours and earns $18 per hour, how much is earned?
a) $628
b) $648
c) $668
d) $688
Explanation: Multiply hours worked (36) by hourly rate ($18): 36 × 18 = 648.
- What is 25% of 80?
a) 20
b) 25
c) 15
d) 30
Explanation: To find 25% of 80, multiply 80 by 0.25: 80 × 0.25 = 20.
- Convert 2.5 liters to milliliters.
a) 250 mL
b) 2500 mL
c) 25 mL
d) 25000 mL
Explanation: 1 liter = 1000 milliliters, so 2.5 liters = 2.5 × 1000 = 2500 mL.
Reading Comprehension
Passage: Hand washing is critical in healthcare settings to prevent infections. Nurses must wash their hands for at least 20 seconds using soap and water, ensuring all surfaces are cleaned.
What is the minimum time nurses should wash their hands?
a) 10 seconds
b) 15 seconds
c) 20 seconds
d) 30 seconds
Explanation: The passage explicitly states that nurses must wash their hands for at least 20 seconds.
- What is the main purpose of hand washing in healthcare?
a) To improve hygiene standards
b) To prevent infections
c) To maintain appearance
d) To save water
Explanation: The passage highlights that hand washing is critical to prevent infections.
- What materials are required for effective hand washing?
a) Water and sanitizer
b) Soap and water
c) Alcohol and towel
d) Gloves and soap
Explanation: The passage specifies using soap and water for hand washing.
- Passage: The heart pumps blood through the body, delivering oxygen to organs.
What is the primary function of the heart described in the passage?
a) To filter blood
b) To produce oxygen
c) To pump blood
d) To store blood
Explanation: The passage directly states that the heart pumps blood.
- What does the heart deliver to organs?
a) Nutrients
b) Oxygen
c) Carbon dioxide
d) Hormones
Explanation: The passage mentions the heart delivers oxygen to organs.
Vocabulary
- What does the term "prognosis" mean?
a) Diagnosis of a disease
b) Predicted outcome of a disease
c) Treatment plan
d) Medical history
Explanation: Prognosis refers to the expected course or outcome of a disease.
- What is the meaning of "acute" in a medical context?
a) Chronic
b) Mild
c) Sudden onset
d) Long-term
Explanation: Acute describes conditions with a sudden and severe onset.
- What does "benign" mean in medical terminology?
a) Harmful
b) Non-cancerous
c) Infectious
d) Chronic
Explanation: Benign refers to non-cancerous growths or conditions.
- What is the definition of "edema"?
a) Swelling due to fluid retention
b) Bone fracture
c) Muscle strain
d) Nerve damage
Explanation: Edema is the accumulation of fluid in tissues, causing swelling.
- What does "palpate" mean?
a) To listen with a stethoscope
b) To examine by touch
c) To measure blood pressure
d) To take a temperature
Explanation: Palpate means to examine a part of the body by touching or pressing.
Grammar
- Choose the correct sentence.
a) The patient were feeling better after treatment.
b) The patient was feeling better after treatment.
c) The patient feeling better after treatment.
d) The patient are feeling better after treatment.
Explanation: "Patient" is singular, so the singular verb "was" is correct.
- Which sentence is grammatically correct?
a) She don’t need no assistance.
b) She doesn’t need any assistance.
c) She don’t need any assistance.
d) She doesn’t needs no assistance.
Explanation: "Doesn’t" is correct for third-person singular, and "any" is appropriate in a negative sentence.
- Identify the correct pronoun in the sentence: The nurse gave ___ the chart.
a) he
b) him
c) his
d) himself
Explanation: "Him" is the correct object pronoun for receiving the chart.
- Which sentence uses correct punctuation?
a) The doctor said, “Take this medication daily”.
b) The doctor said, “Take this medication daily.”
c) The doctor said “Take this medication daily.”
d) The doctor said, “Take this medication daily”.
Explanation: The period should be inside the quotation marks in American English.
- What is the correct form of the verb? The nurses ___ the patient’s chart daily.
a) reviews
b) review
c) reviewing
d) reviewed
Explanation: "Nurses" is plural, so the plural verb "review" is correct in present tense.
Biology
- What is the primary source of energy for cells?
a) Glucose
b) Protein
c) Lipids
d) Water
Explanation: Glucose is broken down during cellular respiration to produce ATP, the cell’s primary energy source.
- What is the function of mitochondria?
a) Protein synthesis
b) Energy production
c) Waste removal
d) Cell division
Explanation: Mitochondria are the powerhouse of the cell, producing ATP through cellular respiration.
- Which molecule carries genetic information?
a) RNA
b) DNA
c) Protein
d) Lipid
Explanation: DNA contains the genetic blueprint for an organism’s traits.
- What is the role of ribosomes?
a) Energy production
b) Protein synthesis
c) DNA replication
d) Cell membrane support
Explanation: Ribosomes translate mRNA into proteins.
- What is the process by which cells divide to produce identical daughter cells?
a) Meiosis
b) Mitosis
c) Binary fission
d) Budding
Explanation: Mitosis produces two identical daughter cells for growth and repair.
Chemistry
- What is the pH of a neutral solution?
a) 0
b) 7
c) 14
d) 10
Explanation: A neutral solution, like pure water, has a pH of 7.
- What type of bond involves the sharing of electrons?
a) Ionic
b) Covalent
c) Hydrogen
d) Metallic
Explanation: Covalent bonds involve the sharing of electrons between atoms.
- What is the atomic number of carbon?
a) 6
b) 8
c) 12
d) 14
Explanation: The atomic number of carbon is 6, indicating 6 protons.
- What gas is produced during photosynthesis?
a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Hydrogen
Explanation: Photosynthesis produces oxygen as a byproduct.
- What is the chemical formula for water?
a) H2O
b) CO2
c) NaCl
d) O2
Explanation: Water is composed of two hydrogen atoms and one oxygen atom, H2O.
Anatomy and Physiology
- Which organ is primarily responsible for filtering blood?
a) Liver
b) Kidneys
c) Lungs
d) Heart
Explanation: The kidneys filter waste products from the blood to form urine.
- What is the function of the alveoli in the lungs?
a) Pump blood
b) Gas exchange
c) Filter air
d) Produce mucus
Explanation: Alveoli are tiny sacs where oxygen and carbon dioxide are exchanged.
- Which bone is located in the upper arm?
a) Radius
b) Ulna
c) Humerus
d) Femur
Explanation: The humerus is the bone of the upper arm, connecting the shoulder to the elbow.
- What muscle type is under voluntary control?
a) Cardiac
b) Smooth
c) Skeletal
d) Involuntary
Explanation: Skeletal muscles are under conscious control, unlike cardiac and smooth muscles.
- What is the primary function of red blood cells?
a) Fight infection
b) Carry oxygen
c) Clot blood
d) Produce antibodies
Explanation: Red blood cells contain hemoglobin, which transports oxygen.
Physics
- What is the unit of force?
a) Joule
b) Newton
c) Watt
d) Volt
Explanation: The Newton (N) is the SI unit of force.
- What is the formula for calculating speed?
a) Speed = Distance × Time
b) Speed = Distance ÷ Time
c) Speed = Time ÷ Distance
d) Speed = Force × Distance
Explanation: Speed is calculated by dividing distance by time.
- What type of energy is stored in a stretched spring?
a) Kinetic
b) Potential
c) Thermal
d) Chemical
Explanation: A stretched spring stores elastic potential energy.
- What is the acceleration due to gravity on Earth?
a) 9.8 m/s²
b) 7.8 m/s²
c) 10.8 m/s²
d) 8.8 m/s²
Explanation: The standard acceleration due to gravity on Earth is approximately 9.8 m/s².
- What is the primary source of energy for Earth’s climate system?
a) Moon
b) Sun
c) Wind
d) Oceans
Explanation: The Sun provides the primary energy driving Earth’s climate.
Additional Mixed Questions
- Convert 98.6°F to Celsius.
a) 37°C
b) 36°C
c) 38°C
d) 39°C
Explanation: Use the formula (F - 32) × 5/9: (98.6 - 32) × 5/9 = 37°C.
- What is the term for a substance that speeds up a chemical reaction?
a) Catalyst
b) Reactant
c) Product
d) Inhibitor
Explanation: A catalyst increases the rate of a chemical reaction without being consumed.
- Which part of the brain controls balance?
a) Cerebrum
b) Cerebellum
c) Medulla
d) Thalamus
Explanation: The cerebellum is responsible for coordination and balance.
- What is 15% of 200?
a) 20
b) 25
c) 30
d) 35
Explanation: 15% of 200 = 200 × 0.15 = 30.
- What does “distal” mean in anatomical terms?
a) Closer to the point of attachment
b) Farther from the point of attachment
c) Toward the midline
d) Away from the surface
Explanation: Distal describes a position farther from the point of attachment or origin.
- Which sentence is correct?
a) The doctor and nurse was preparing the patient.
b) The doctor and nurse were preparing the patient.
c) The doctor and nurse is preparing the patient.
d) The doctor and nurse prepares the patient.
Explanation: The subject “doctor and nurse” is plural, so “were” is correct.
- What is the function of the pancreas?
a) Filters blood
b) Produces insulin
c) Stores bile
d) Pumps blood
Explanation: The pancreas produces insulin to regulate blood sugar.
- What is the chemical symbol for sodium?
a) Na
b) S
c) N
d) So
Explanation: Na is the chemical symbol for sodium on the periodic table.
- What is the process of breaking down food into nutrients?
a) Digestion
b) Circulation
c) Respiration
d) Excretion
Explanation: Digestion is the process of breaking down food into absorbable nutrients.
- If a patient’s chart shows a pulse rate of 80 beats per minute, how many beats occur in 15 seconds?
a) 20 beats
b) 15 beats
c) 25 beats
d) 30 beats
Explanation: Divide 80 beats per minute by 60 seconds to get beats per second (80 ÷ 60 = 1.33), then multiply by 15 seconds: 1.33 × 15 = 20 beats.
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