Certified Industrial Hygienist (CIH) [exam-quick]

Question 1

An industrial hygienist is sampling for respirable crystalline silica in a dusty construction environment using a 10-mm nylon cyclone. To ensure the cyclone correctly separates the respirable fraction according to the ACGIH/ISO/CEN convention, what is the required flow rate and corresponding 50% cut-point?

1.7 L/min for a 5.0 µm cut-point 2.5 L/min for a 4.0 µm cut-point 2.0 L/min for a 10.0 µm cut-point 3.0 L/min for a 3.5 µm cut-point

Correct Answer:

2.5 L/min for a 4.0 µm cut-point

Question 2

A key limitation of using Phase Contrast Microscopy (PCM) via NIOSH Method 7400 for analyzing asbestos samples is its inability to:

Quantify fibers smaller than 5 µm in length. Be used for personal air sampling. Differentiate between asbestos and non-asbestos fibers. Achieve a low enough detection limit for clearance sampling.

Correct Answer:

Differentiate between asbestos and non-asbestos fibers.

Question 3

Which of the following direct-reading instruments is most suitable for detecting a broad range of volatile organic compounds (VOCs) at low parts-per-million (ppm) levels and operates by using a high-energy ultraviolet lamp to ionize the target molecules?

Electrochemical Sensor Catalytic Combustion Sensor Non-Dispersive Infrared (NDIR) Analyzer Photoionization Detector (PID)

Correct Answer:

Photoionization Detector (PID)

Question 4

An industrial hygienist is setting up a personal sampling pump for an 8-hour TWA sample. According to standard industrial hygiene practice, when must the pump's flow rate be checked with a calibrated flowmeter?

Only at the beginning of the shift Only at the end of the shift At the beginning and end of the shift Once per week, if used daily

Correct Answer:

At the beginning and end of the shift

Question 5

A significant advantage of using passive dosimeters for personal exposure monitoring compared to active sampling methods is that they:

Provide real-time concentration readings. Do not require a sampling pump or calibration. Are suitable for sampling all types of chemical hazards. Have higher sampling rates for short-duration tasks.

Correct Answer:

Do not require a sampling pump or calibration.

Exam overview

About this Exam

Prepare with the Certified Industrial Hygienist (CIH) [exam-quick] practice quiz. This question bank includes 30 questions covering industrial, radiation, velocity, hygienist, and feet. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Certified Industrial Hygienist (CIH) [exam-quick]

This practice set contains 30 questions from the matching question bank and focuses on industrial, radiation, velocity, hygienist, and feet. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Certified Industrial Hygienist (CIH) [exam-quick]

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