D450 OA Exam Prep (2026/2027) – WGU Community
Health OA – 400+ Practice Questions & Study Guide |
Guarantee Pass
400 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Epidemiology
2 Community Assessment
3 Levels of Prevention
4 Health Promotion
5 Vulnerable Populations
6 Communicable Disease
7 Environmental Health
8 Public Health Nursing Roles
9 Policy & Ethics
10 Disaster Nursing
,Q1
Which of the following best defines community health nursing?
A) Nursing care provided only in hospitals
B) Nursing care focused on populations and communities CORRECT
C) Nursing care for individuals in clinics
D) Nursing care limited to home visits
Rationale
Community health nursing emphasizes population-focused care, health promotion, and disease
prevention.
Q2
The incidence rate of a disease measures:
A) The total number of existing cases
B) The number of new cases in a population over a specific time CORRECT
C) The number of deaths from a disease
D) The number of hospitalizations
Rationale
Incidence quantifies new cases; prevalence measures existing cases.
Q3
A nurse conducts a windshield survey. This is an example of:
A) Primary prevention
B) Community assessment CORRECT
C) Tertiary prevention
D) Secondary prevention
2
,Rationale
Windshield surveys provide observational data about a community’s physical and social environment.
Q4
Which level of prevention is immunizing children against measles?
A) Primary CORRECT
B) Primary
C) Secondary
D) Tertiary
Rationale
Immunization prevents disease before it occurs, which is primary prevention.
Q5
A community health nurse is investigating a foodborne illness outbreak. The first step is to:
A) Interview all affected individuals
B) Identify and define the outbreak CORRECT
C) Close the restaurant
D) Notify the CDC
Rationale
Outbreak investigation begins with confirming the existence of an outbreak and defining cases.
Q6
Which of the following is a social determinant of health?
A) Blood pressure
B) Poverty CORRECT
3
, C) Cholesterol level
D) Body mass index
Rationale
Social determinants include economic status, education, and environment that affect health outcomes.
Q7
A nurse is teaching a community group about hand hygiene. This is:
A) Primary prevention CORRECT
B) Primary prevention
C) Secondary prevention
D) Tertiary prevention
Rationale
Health education to prevent disease is primary prevention.
Q8
The prevalence of a disease is:
A) The number of new cases
B) The total number of existing cases at a given time CORRECT
C) The number of deaths
D) The number of recovered cases
Rationale
Prevalence includes both new and old cases at a specific point or period.
4
Health OA – 400+ Practice Questions & Study Guide |
Guarantee Pass
400 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Epidemiology
2 Community Assessment
3 Levels of Prevention
4 Health Promotion
5 Vulnerable Populations
6 Communicable Disease
7 Environmental Health
8 Public Health Nursing Roles
9 Policy & Ethics
10 Disaster Nursing
,Q1
Which of the following best defines community health nursing?
A) Nursing care provided only in hospitals
B) Nursing care focused on populations and communities CORRECT
C) Nursing care for individuals in clinics
D) Nursing care limited to home visits
Rationale
Community health nursing emphasizes population-focused care, health promotion, and disease
prevention.
Q2
The incidence rate of a disease measures:
A) The total number of existing cases
B) The number of new cases in a population over a specific time CORRECT
C) The number of deaths from a disease
D) The number of hospitalizations
Rationale
Incidence quantifies new cases; prevalence measures existing cases.
Q3
A nurse conducts a windshield survey. This is an example of:
A) Primary prevention
B) Community assessment CORRECT
C) Tertiary prevention
D) Secondary prevention
2
,Rationale
Windshield surveys provide observational data about a community’s physical and social environment.
Q4
Which level of prevention is immunizing children against measles?
A) Primary CORRECT
B) Primary
C) Secondary
D) Tertiary
Rationale
Immunization prevents disease before it occurs, which is primary prevention.
Q5
A community health nurse is investigating a foodborne illness outbreak. The first step is to:
A) Interview all affected individuals
B) Identify and define the outbreak CORRECT
C) Close the restaurant
D) Notify the CDC
Rationale
Outbreak investigation begins with confirming the existence of an outbreak and defining cases.
Q6
Which of the following is a social determinant of health?
A) Blood pressure
B) Poverty CORRECT
3
, C) Cholesterol level
D) Body mass index
Rationale
Social determinants include economic status, education, and environment that affect health outcomes.
Q7
A nurse is teaching a community group about hand hygiene. This is:
A) Primary prevention CORRECT
B) Primary prevention
C) Secondary prevention
D) Tertiary prevention
Rationale
Health education to prevent disease is primary prevention.
Q8
The prevalence of a disease is:
A) The number of new cases
B) The total number of existing cases at a given time CORRECT
C) The number of deaths
D) The number of recovered cases
Rationale
Prevalence includes both new and old cases at a specific point or period.
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