PENNSYLVANIA DEP ASBESTOS AIR
SAMPLING PROFESSIONAL EXAM
Questions With Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which federal regulation primarily governs asbestos air
monitoring procedures in occupational settings?
A. OSHA 29 CFR 1926.1101
B. EPA Clean Air Act Section 112
C. NIOSH Method 7400
D. ASTM D7338
Correct Answer: A. OSHA 29 CFR 1926.1101
Rationale: OSHA 29 CFR 1926.1101 establishes asbestos
exposure standards for construction, including air monitoring
requirements and permissible exposure limits.
2. What is the primary purpose of Phase Contrast Microscopy
(PCM) in asbestos air sampling?
, A. Identify asbestos fiber type
B. Count total fibers in air samples
C. Determine mineral composition
D. Measure fiber toxicity
Correct Answer: B. Count total fibers in air samples
Rationale: PCM is used to count airborne fibers but cannot
distinguish asbestos from non-asbestos fibers.
3. Which method is commonly used to confirm asbestos fiber
type after PCM screening?
A. X-ray diffraction
B. Transmission Electron Microscopy (TEM)
C. Gravimetric analysis
D. Infrared spectroscopy
Correct Answer: B. Transmission Electron Microscopy (TEM)
Rationale: TEM allows identification and confirmation of
asbestos fiber morphology and composition.
4. What is the typical flow rate range for personal asbestos
air sampling pumps?
A. 0.1–0.5 L/min
B. 1–12 L/min
, C. 20–50 L/min
D. 100–200 L/min
Correct Answer: B. 1–12 L/min
Rationale: Personal sampling pumps typically operate
between 1–12 liters per minute depending on method
requirements.
5. Which filter type is required for PCM asbestos sampling?
A. Polycarbonate filter
B. Mixed cellulose ester (MCE) filter
C. PTFE membrane filter
D. Glass fiber filter
Correct Answer: B. Mixed cellulose ester (MCE) filter
Rationale: MCE filters are standard for asbestos PCM sampling
due to fiber retention and visibility under microscopy.
6. What is the minimum sampling volume recommended for
reliable asbestos PCM analysis?
A. 10 liters
B. 50 liters
C. 100–1000 liters
D. 10,000 liters
, Correct Answer: C. 100–1000 liters
Rationale: Adequate air volume ensures sufficient fiber
loading for accurate fiber counting.
7. Which organization publishes the NIOSH 7400 asbestos
analytical method?
A. EPA
B. OSHA
C. NIOSH
D. ASTM
Correct Answer: C. NIOSH
Rationale: The National Institute for Occupational Safety and
Health develops analytical methods including 7400 for fiber
counting.
8. What is the primary purpose of a field blank in asbestos
sampling?
A. Measure background fiber levels in laboratory
B. Detect contamination during sampling and transport
C. Increase sample accuracy
D. Calibrate pump flow rate
Correct Answer: B. Detect contamination during sampling and
transport
SAMPLING PROFESSIONAL EXAM
Questions With Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which federal regulation primarily governs asbestos air
monitoring procedures in occupational settings?
A. OSHA 29 CFR 1926.1101
B. EPA Clean Air Act Section 112
C. NIOSH Method 7400
D. ASTM D7338
Correct Answer: A. OSHA 29 CFR 1926.1101
Rationale: OSHA 29 CFR 1926.1101 establishes asbestos
exposure standards for construction, including air monitoring
requirements and permissible exposure limits.
2. What is the primary purpose of Phase Contrast Microscopy
(PCM) in asbestos air sampling?
, A. Identify asbestos fiber type
B. Count total fibers in air samples
C. Determine mineral composition
D. Measure fiber toxicity
Correct Answer: B. Count total fibers in air samples
Rationale: PCM is used to count airborne fibers but cannot
distinguish asbestos from non-asbestos fibers.
3. Which method is commonly used to confirm asbestos fiber
type after PCM screening?
A. X-ray diffraction
B. Transmission Electron Microscopy (TEM)
C. Gravimetric analysis
D. Infrared spectroscopy
Correct Answer: B. Transmission Electron Microscopy (TEM)
Rationale: TEM allows identification and confirmation of
asbestos fiber morphology and composition.
4. What is the typical flow rate range for personal asbestos
air sampling pumps?
A. 0.1–0.5 L/min
B. 1–12 L/min
, C. 20–50 L/min
D. 100–200 L/min
Correct Answer: B. 1–12 L/min
Rationale: Personal sampling pumps typically operate
between 1–12 liters per minute depending on method
requirements.
5. Which filter type is required for PCM asbestos sampling?
A. Polycarbonate filter
B. Mixed cellulose ester (MCE) filter
C. PTFE membrane filter
D. Glass fiber filter
Correct Answer: B. Mixed cellulose ester (MCE) filter
Rationale: MCE filters are standard for asbestos PCM sampling
due to fiber retention and visibility under microscopy.
6. What is the minimum sampling volume recommended for
reliable asbestos PCM analysis?
A. 10 liters
B. 50 liters
C. 100–1000 liters
D. 10,000 liters
, Correct Answer: C. 100–1000 liters
Rationale: Adequate air volume ensures sufficient fiber
loading for accurate fiber counting.
7. Which organization publishes the NIOSH 7400 asbestos
analytical method?
A. EPA
B. OSHA
C. NIOSH
D. ASTM
Correct Answer: C. NIOSH
Rationale: The National Institute for Occupational Safety and
Health develops analytical methods including 7400 for fiber
counting.
8. What is the primary purpose of a field blank in asbestos
sampling?
A. Measure background fiber levels in laboratory
B. Detect contamination during sampling and transport
C. Increase sample accuracy
D. Calibrate pump flow rate
Correct Answer: B. Detect contamination during sampling and
transport
