Community Health HESI Practice Exam
2026/2027 | Public Health Nursing
Questions, Scenarios & Rationales Study
Guide
• This question Community Health HESI Practice Exam 2026/2027 covers all major
public health nursing domains — epidemiology, disease prevention, maternal
health, occupational health, disaster nursing, environmental health, and more —
with detailed EXPERT RATIONALE to reinforce understanding.
• Study by attempting each question independently, then check the bold correct
answer and EXPERT RATIONALE beneath it for maximum retention and exam
readiness.
COMMUNITY HEALTH HESI PRACTICE EXAM 2026/2027
PUBLIC HEALTH NURSING — QUESTIONS WITH EXPERT RATIONALE
1. Which of the following BEST defines epidemiology?
A. The study of individual patient care and clinical outcomes
B. The science that studies the distribution and determinants of health-related
states in populations
C. The examination of cellular and molecular disease processes
D. The clinical pharmacological management of infectious diseases
E. The study of hospital-acquired infections only
✓ Correct Answer: B. The science that studies the distribution and
determinants of health-related states in populations
EXPERT RATIONALE: Epidemiology is the study of distribution (who, where, when)
and determinants (why, how) of health-related events in populations, applied to
control health problems. It forms the foundation of public health practice.
,2. The number of new cases of a disease occurring in a population during a
specific time period is called:
A. Prevalence
B. Mortality rate
C. Incidence
D. Morbidity ratio
E. Attack rate
✓ Correct Answer: C. Incidence
EXPERT RATIONALE: Incidence refers to the number of new cases of a disease
arising in a population during a specified time period. It measures the risk of
developing the disease and is the key measure in outbreak investigations.
3. Prevalence differs from incidence in that prevalence:
A. Counts only new cases in a population
B. Measures the speed of disease spread
C. Includes both new and existing cases of a disease at a given point in time
D. Applies only to chronic diseases
E. Is calculated per 1,000 live births
✓ Correct Answer: C. Includes both new and existing cases of a disease at a
given point in time
EXPERT RATIONALE: Prevalence measures the total number of existing cases (new
and old) in a population at a specific point or period, while incidence counts only
new cases. Prevalence reflects disease burden; incidence reflects disease risk.
4. A community health nurse is investigating an outbreak of salmonella in a
community. This type of investigation is an example of:
,A. Descriptive epidemiology
B. Analytic epidemiology
C. Experimental epidemiology
D. Clinical epidemiology
E. Social epidemiology
✓ Correct Answer: A. Descriptive epidemiology
EXPERT RATIONALE: Descriptive epidemiology characterizes the distribution of
disease by person, place, and time. Outbreak investigations that describe who is
affected, where, and when are classic examples. Analytic epidemiology tests
hypotheses about causation.
5. In a community of 50,000 people, 500 new cases of tuberculosis are
reported in one year. What is the incidence rate per 100,000?
A. 500
B. 1,000
C. 100
D. 250
E. 750
✓ Correct Answer: B. 1,000
EXPERT RATIONALE: Incidence rate = (Number of new cases ÷ Population at risk) ×
100,000 = (500 ÷ 50,000) × 100,000 = 1,000 per 100,000 population.
6. Which measure of disease frequency is MOST appropriate to assess the
burden of a chronic disease like diabetes in a community?
A. Incidence rate
B. Attack rate
, C. Case fatality rate
D. Prevalence rate
E. Secondary attack rate
✓ Correct Answer: D. Prevalence rate
EXPERT RATIONALE: Prevalence is most useful for measuring the burden of
chronic diseases because it captures all existing cases. Chronic diseases persist for
long periods, making prevalence the better measure of total disease burden in
planning community health services.
7. The epidemiological triad consists of:
A. Host, vector, and reservoir
B. Agent, host, and environment
C. Person, place, and time
D. Primary, secondary, and tertiary prevention
E. Incidence, prevalence, and mortality
✓ Correct Answer: B. Agent, host, and environment
EXPERT RATIONALE: The epidemiological triad is the traditional model of infectious
disease causation, consisting of an agent (cause), a host (susceptible individual),
and the environment (external factors). Breaking any component of the triad
prevents disease.
8. Sensitivity of a screening test refers to:
A. The ability of the test to correctly identify those without the disease
B. The probability that a positive test is truly positive
C. The ability of the test to correctly identify those who have the disease
D. The consistency of the test results over time
2026/2027 | Public Health Nursing
Questions, Scenarios & Rationales Study
Guide
• This question Community Health HESI Practice Exam 2026/2027 covers all major
public health nursing domains — epidemiology, disease prevention, maternal
health, occupational health, disaster nursing, environmental health, and more —
with detailed EXPERT RATIONALE to reinforce understanding.
• Study by attempting each question independently, then check the bold correct
answer and EXPERT RATIONALE beneath it for maximum retention and exam
readiness.
COMMUNITY HEALTH HESI PRACTICE EXAM 2026/2027
PUBLIC HEALTH NURSING — QUESTIONS WITH EXPERT RATIONALE
1. Which of the following BEST defines epidemiology?
A. The study of individual patient care and clinical outcomes
B. The science that studies the distribution and determinants of health-related
states in populations
C. The examination of cellular and molecular disease processes
D. The clinical pharmacological management of infectious diseases
E. The study of hospital-acquired infections only
✓ Correct Answer: B. The science that studies the distribution and
determinants of health-related states in populations
EXPERT RATIONALE: Epidemiology is the study of distribution (who, where, when)
and determinants (why, how) of health-related events in populations, applied to
control health problems. It forms the foundation of public health practice.
,2. The number of new cases of a disease occurring in a population during a
specific time period is called:
A. Prevalence
B. Mortality rate
C. Incidence
D. Morbidity ratio
E. Attack rate
✓ Correct Answer: C. Incidence
EXPERT RATIONALE: Incidence refers to the number of new cases of a disease
arising in a population during a specified time period. It measures the risk of
developing the disease and is the key measure in outbreak investigations.
3. Prevalence differs from incidence in that prevalence:
A. Counts only new cases in a population
B. Measures the speed of disease spread
C. Includes both new and existing cases of a disease at a given point in time
D. Applies only to chronic diseases
E. Is calculated per 1,000 live births
✓ Correct Answer: C. Includes both new and existing cases of a disease at a
given point in time
EXPERT RATIONALE: Prevalence measures the total number of existing cases (new
and old) in a population at a specific point or period, while incidence counts only
new cases. Prevalence reflects disease burden; incidence reflects disease risk.
4. A community health nurse is investigating an outbreak of salmonella in a
community. This type of investigation is an example of:
,A. Descriptive epidemiology
B. Analytic epidemiology
C. Experimental epidemiology
D. Clinical epidemiology
E. Social epidemiology
✓ Correct Answer: A. Descriptive epidemiology
EXPERT RATIONALE: Descriptive epidemiology characterizes the distribution of
disease by person, place, and time. Outbreak investigations that describe who is
affected, where, and when are classic examples. Analytic epidemiology tests
hypotheses about causation.
5. In a community of 50,000 people, 500 new cases of tuberculosis are
reported in one year. What is the incidence rate per 100,000?
A. 500
B. 1,000
C. 100
D. 250
E. 750
✓ Correct Answer: B. 1,000
EXPERT RATIONALE: Incidence rate = (Number of new cases ÷ Population at risk) ×
100,000 = (500 ÷ 50,000) × 100,000 = 1,000 per 100,000 population.
6. Which measure of disease frequency is MOST appropriate to assess the
burden of a chronic disease like diabetes in a community?
A. Incidence rate
B. Attack rate
, C. Case fatality rate
D. Prevalence rate
E. Secondary attack rate
✓ Correct Answer: D. Prevalence rate
EXPERT RATIONALE: Prevalence is most useful for measuring the burden of
chronic diseases because it captures all existing cases. Chronic diseases persist for
long periods, making prevalence the better measure of total disease burden in
planning community health services.
7. The epidemiological triad consists of:
A. Host, vector, and reservoir
B. Agent, host, and environment
C. Person, place, and time
D. Primary, secondary, and tertiary prevention
E. Incidence, prevalence, and mortality
✓ Correct Answer: B. Agent, host, and environment
EXPERT RATIONALE: The epidemiological triad is the traditional model of infectious
disease causation, consisting of an agent (cause), a host (susceptible individual),
and the environment (external factors). Breaking any component of the triad
prevents disease.
8. Sensitivity of a screening test refers to:
A. The ability of the test to correctly identify those without the disease
B. The probability that a positive test is truly positive
C. The ability of the test to correctly identify those who have the disease
D. The consistency of the test results over time
