CPH Exam: Environmental Health Sciences –
Practice Questions & Answers | Latest Update
2026 | Exam Prep PDF | Graded A+
Environmental Health - correct answerComprises those aspects of human health,
including quality of life, that are determined by physical, chemical, biological, social, and
psychosocial factors in the environment. It also refers to the theory and practice of
assuming, correcting, controlling, and preventing those factors in the environment that
potentially can affect adversely the health of present and future populations.
In the past, population growth presented challenges such as: - correct answer1)
Adequate quality food/water*
2) Waste production/removal/disposal
3) Infectious disease
4) Safety
5) Industry/economy/capacity
Common occupational respiratory diseases: - correct answer1) Asbestosis:
- Previously used as an insulator
- Inhaled fibers
- Causes mesothelioma and bronchogenic carcinoma
- Blue asbestos is the most toxic
2) Silicosis:
- Sand inhalation via dust (dirt which generates silicic acid and kills macrophages -
finally dead cells are replaced with scar tissue
- Inflammatory lung disease
3) Coal workers' pneumoconiosis:
- "Black lung disease"
- Miners inhaling coal dust - producing respiratory deficits and fibrosis
- Chronic obstructive lung disease
Toxicity: Acute and Chronic - correct answerAcute: Fast & temporary
Chronic: Prolonged
The concept, "The dose makes the poison" - correct answerAll elements are toxic to
some quantifiable degree
LD50 - correct answerThe amount (dose) of a chemical which produces death in 50% of
a population of test animals to which it is administered to via ingestion or skin
application (mg/kg)
LC50 - correct answerConcentration of an environmental chemical in which exposure to
causes death in 50% of the population
, What is the goal of metabolism? - correct answerTo detoxify
What influences metabolism? - correct answerAge, weight, Comorbidities
Routes of entry - correct answer1) Inhalation
2) Absorption
3) Ingestion
4) Injection
NOAEL - correct answerHigh dose that did not cause a response
LOAEL - correct answerLowest dose that did not cause a response
Demographic Transition - correct answer1) Stage 1: Stable pattern of high fertility and
high mortality
2) Stage 2: As mortality declines, population grows w/ younger share of population
increasing
3) Fertility declines, population growth slows and older share of population increases
4) Stage 4: Fertility and mortality rates stabilize - population maintains its size
5) Stage 5: Lower fertility and an aging population result in an overall decreasing
population
Epidemiologic Transition - correct answerAs cause of death shifted from communicable
to non-communicable disease, populations began living longer
Interaction between poverty, environmental degradation, and high fertility - correct
answerPoverty leads to environmental degradation (including lack of contraception)
which leads to high fertility (including dwindling resources + more people) and back to
poverty
Environmental Justice Part 1 - correct answerThe equal treatment of all people in
society irrespective of their racial background, country of origin, and SES
Environmental sustainability - correct answerAdheres to the philosophical viewpoint that
a strong, just, and wealthy society can be consistent with a clean environment, health
ecosystem, and a beautiful planet
The Polluter Pays Principal - correct answerThe polluter should bear the expenses of
carrying the pollution prevention & control measures to ensure the environment is in an
acceptable stage
Steps of the policy cycle - correct answer1) Policy definition/formulation
2) Agenda setting
3) Policy establishment
4) Policy implementation
Practice Questions & Answers | Latest Update
2026 | Exam Prep PDF | Graded A+
Environmental Health - correct answerComprises those aspects of human health,
including quality of life, that are determined by physical, chemical, biological, social, and
psychosocial factors in the environment. It also refers to the theory and practice of
assuming, correcting, controlling, and preventing those factors in the environment that
potentially can affect adversely the health of present and future populations.
In the past, population growth presented challenges such as: - correct answer1)
Adequate quality food/water*
2) Waste production/removal/disposal
3) Infectious disease
4) Safety
5) Industry/economy/capacity
Common occupational respiratory diseases: - correct answer1) Asbestosis:
- Previously used as an insulator
- Inhaled fibers
- Causes mesothelioma and bronchogenic carcinoma
- Blue asbestos is the most toxic
2) Silicosis:
- Sand inhalation via dust (dirt which generates silicic acid and kills macrophages -
finally dead cells are replaced with scar tissue
- Inflammatory lung disease
3) Coal workers' pneumoconiosis:
- "Black lung disease"
- Miners inhaling coal dust - producing respiratory deficits and fibrosis
- Chronic obstructive lung disease
Toxicity: Acute and Chronic - correct answerAcute: Fast & temporary
Chronic: Prolonged
The concept, "The dose makes the poison" - correct answerAll elements are toxic to
some quantifiable degree
LD50 - correct answerThe amount (dose) of a chemical which produces death in 50% of
a population of test animals to which it is administered to via ingestion or skin
application (mg/kg)
LC50 - correct answerConcentration of an environmental chemical in which exposure to
causes death in 50% of the population
, What is the goal of metabolism? - correct answerTo detoxify
What influences metabolism? - correct answerAge, weight, Comorbidities
Routes of entry - correct answer1) Inhalation
2) Absorption
3) Ingestion
4) Injection
NOAEL - correct answerHigh dose that did not cause a response
LOAEL - correct answerLowest dose that did not cause a response
Demographic Transition - correct answer1) Stage 1: Stable pattern of high fertility and
high mortality
2) Stage 2: As mortality declines, population grows w/ younger share of population
increasing
3) Fertility declines, population growth slows and older share of population increases
4) Stage 4: Fertility and mortality rates stabilize - population maintains its size
5) Stage 5: Lower fertility and an aging population result in an overall decreasing
population
Epidemiologic Transition - correct answerAs cause of death shifted from communicable
to non-communicable disease, populations began living longer
Interaction between poverty, environmental degradation, and high fertility - correct
answerPoverty leads to environmental degradation (including lack of contraception)
which leads to high fertility (including dwindling resources + more people) and back to
poverty
Environmental Justice Part 1 - correct answerThe equal treatment of all people in
society irrespective of their racial background, country of origin, and SES
Environmental sustainability - correct answerAdheres to the philosophical viewpoint that
a strong, just, and wealthy society can be consistent with a clean environment, health
ecosystem, and a beautiful planet
The Polluter Pays Principal - correct answerThe polluter should bear the expenses of
carrying the pollution prevention & control measures to ensure the environment is in an
acceptable stage
Steps of the policy cycle - correct answer1) Policy definition/formulation
2) Agenda setting
3) Policy establishment
4) Policy implementation
