MSHA Respiratory Protection Training
Certification Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following is the primary purpose of a respirator?
A. Protecting clothing from dirt
B. Preventing eye injuries
C. Protecting the wearer from inhaling harmful airborne
contaminants
D. Increasing oxygen supply
Rationale: The primary purpose of a respirator is to prevent the
inhalation of hazardous airborne substances, including dust,
fumes, gases, and vapors, which can cause serious respiratory
illnesses or long-term health effects.
2. Before using a respirator, a miner must undergo which of the
following?
A. Hearing test
B. Medical evaluation
C. Physical agility test
D. Annual safety meeting
, Rationale: A medical evaluation ensures that the wearer is
physically capable of safely using a respirator. Certain respirators
can restrict airflow and place stress on the heart and lungs, so
medical clearance is mandatory.
3. What is the first step in donning a tight-fitting respirator?
A. Starting the blower
B. Adjusting the straps
C. Inspecting the respirator for damage or defects
D. Turning on the air supply
Rationale: Inspection ensures the respirator is free of defects such
as cracks, torn straps, or damaged filters, which could compromise
protection.
4. Which respirator component is essential for achieving a proper
seal on a tight-fitting facepiece?
A. Filter cartridge
B. Head harness
C. Facepiece gasket
D. Exhalation valve
Rationale: The facepiece gasket forms a seal against the wearer’s
face. Without a proper seal, contaminated air could leak into the
breathing zone.
5. How often should a respirator be cleaned and disinfected?
A. Once a week
B. After each use
C. Once a month
D. Only when visibly dirty
Rationale: Cleaning after each use prevents contamination from
, hazardous substances and maintains the respirator in sanitary
condition.
6. What is the maximum time a user should wear a disposable
respirator?
A. 8 hours
B. 24 hours
C. Until it becomes damaged, soiled, or breathing becomes
difficult
D. 5 days
Rationale: Disposable respirators should be discarded when they
are soiled, damaged, or when breathing resistance increases,
rather than on a fixed schedule.
7. Which of the following is a limitation of air-purifying respirators
(APRs)?
A. They provide unlimited oxygen
B. They can filter all gases and vapors
C. They are ineffective in oxygen-deficient atmospheres
D. They can be used underwater
Rationale: APRs rely on filtering ambient air and do not supply
oxygen. They cannot be used where oxygen levels are below safe
limits.
8. The OSHA/NIOSH standard requires a fit test for which type of
respirator?
A. Loose-fitting hood
B. Tight-fitting respirators
C. Powered air-purifying respirators with loose hoods
D. Disposable dust masks
, Rationale: Tight-fitting respirators require a fit test to ensure the
facepiece seals properly. Loose-fitting hoods or helmets do not
require the same fit testing.
9. What is the primary purpose of a P100 filter cartridge?
A. Protecting against chemical vapors
B. Filtering at least 99.97% of airborne particles
C. Increasing airflow
D. Providing oxygen
Rationale: P100 filters are designed to remove 99.97% of airborne
particles, including dust, fumes, and biological contaminants.
10. When performing a user seal check on a respirator, you
should:
A. Put it on and breathe normally
B. Adjust straps only
C. Cover the respirator filter openings and inhale/exhale to
detect leaks
D. Use a chemical indicator
Rationale: A user seal check confirms that the respirator is
properly seated and sealed. Blocking filter openings and checking
for leaks ensures contaminated air does not enter.
11. Which of the following is a sign that a respirator should be
replaced?
A. Loose head straps
B. Cracked or damaged facepiece
C. Mild discomfort
D. Clean filter
Certification Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following is the primary purpose of a respirator?
A. Protecting clothing from dirt
B. Preventing eye injuries
C. Protecting the wearer from inhaling harmful airborne
contaminants
D. Increasing oxygen supply
Rationale: The primary purpose of a respirator is to prevent the
inhalation of hazardous airborne substances, including dust,
fumes, gases, and vapors, which can cause serious respiratory
illnesses or long-term health effects.
2. Before using a respirator, a miner must undergo which of the
following?
A. Hearing test
B. Medical evaluation
C. Physical agility test
D. Annual safety meeting
, Rationale: A medical evaluation ensures that the wearer is
physically capable of safely using a respirator. Certain respirators
can restrict airflow and place stress on the heart and lungs, so
medical clearance is mandatory.
3. What is the first step in donning a tight-fitting respirator?
A. Starting the blower
B. Adjusting the straps
C. Inspecting the respirator for damage or defects
D. Turning on the air supply
Rationale: Inspection ensures the respirator is free of defects such
as cracks, torn straps, or damaged filters, which could compromise
protection.
4. Which respirator component is essential for achieving a proper
seal on a tight-fitting facepiece?
A. Filter cartridge
B. Head harness
C. Facepiece gasket
D. Exhalation valve
Rationale: The facepiece gasket forms a seal against the wearer’s
face. Without a proper seal, contaminated air could leak into the
breathing zone.
5. How often should a respirator be cleaned and disinfected?
A. Once a week
B. After each use
C. Once a month
D. Only when visibly dirty
Rationale: Cleaning after each use prevents contamination from
, hazardous substances and maintains the respirator in sanitary
condition.
6. What is the maximum time a user should wear a disposable
respirator?
A. 8 hours
B. 24 hours
C. Until it becomes damaged, soiled, or breathing becomes
difficult
D. 5 days
Rationale: Disposable respirators should be discarded when they
are soiled, damaged, or when breathing resistance increases,
rather than on a fixed schedule.
7. Which of the following is a limitation of air-purifying respirators
(APRs)?
A. They provide unlimited oxygen
B. They can filter all gases and vapors
C. They are ineffective in oxygen-deficient atmospheres
D. They can be used underwater
Rationale: APRs rely on filtering ambient air and do not supply
oxygen. They cannot be used where oxygen levels are below safe
limits.
8. The OSHA/NIOSH standard requires a fit test for which type of
respirator?
A. Loose-fitting hood
B. Tight-fitting respirators
C. Powered air-purifying respirators with loose hoods
D. Disposable dust masks
, Rationale: Tight-fitting respirators require a fit test to ensure the
facepiece seals properly. Loose-fitting hoods or helmets do not
require the same fit testing.
9. What is the primary purpose of a P100 filter cartridge?
A. Protecting against chemical vapors
B. Filtering at least 99.97% of airborne particles
C. Increasing airflow
D. Providing oxygen
Rationale: P100 filters are designed to remove 99.97% of airborne
particles, including dust, fumes, and biological contaminants.
10. When performing a user seal check on a respirator, you
should:
A. Put it on and breathe normally
B. Adjust straps only
C. Cover the respirator filter openings and inhale/exhale to
detect leaks
D. Use a chemical indicator
Rationale: A user seal check confirms that the respirator is
properly seated and sealed. Blocking filter openings and checking
for leaks ensures contaminated air does not enter.
11. Which of the following is a sign that a respirator should be
replaced?
A. Loose head straps
B. Cracked or damaged facepiece
C. Mild discomfort
D. Clean filter
