ASP - Associate Safety Professional Industrial Hygiene and Health Questions and Answers

Question 1

An industrial hygienist is evaluating a chemical exposure in a manufacturing facility.
The OSHA Permissible Exposure Limit (PEL) for the substance is 20 ppm as an 8-hour TWA.
The ACGIH Threshold Limit Value (TLV) is 10 ppm as an 8-hour TWA.
Which of the following statements is the most accurate characterization of these exposure limits?

Accepted Answer

The PEL is a legally enforceable limit, while the TLV is a recommended guideline that represents a more protective level.

Answer

The TLV is the legal limit that must be met, while the PEL is a less stringent, outdated guideline.

Answer

Both the PEL and TLV are legally enforceable standards, but the more stringent of the two must always be followed.

Answer

The PEL is based purely on health factors, whereas the TLV takes into account economic and technical feasibility.

Question 2

A safety professional is implementing a local exhaust ventilation (LEV) system to control airborne contaminants from a welding operation. Which of the following are the five essential components of a typical LEV system?

Accepted Answer

A hood, ducts, an air cleaner, a fan, and an exhaust stack

Answer

A filter, a pump, tubing, a collection bag, and an alarm

Answer

An intake valve, a pre-filter, a fan, a silencer, and a discharge pipe

Answer

A sensor, a control panel, a damper, a motor, and a chimney

Question 3

According to the hierarchy of controls, which of the following is considered the MOST effective method for controlling a workplace hazard?

Accepted Answer

Physically removing the hazard from the workplace

Answer

Implementing a job rotation schedule

Answer

Requiring the use of personal protective equipment (PPE)

Answer

Installing a ventilation system

Question 4

An employee's 8-hour time-weighted average (TWA) noise exposure is measured at 87 dBA. According to OSHA's occupational noise exposure standard (29 CFR 1910.95), what is the employer's primary obligation?

Accepted Answer

Provide a baseline audiogram and annual training as part of a Hearing Conservation Program.

Answer

Immediately implement engineering controls to reduce the noise level.

Answer

Mandate the use of hearing protection for the exposed employee.

Answer

No action is required because the exposure is below the Permissible Exposure Limit (PEL) of 90 dBA.

Question 5

To assess a worker's risk of heat stress, an industrial hygienist uses a Wet Bulb Globe Temperature (WBGT) meter. This instrument is designed to provide a composite temperature reading by directly measuring or calculating which three environmental factors?

Accepted Answer

Radiant heat, humidity, and air temperature

Answer

Air temperature, barometric pressure, and wind speed

Answer

Solar load, air velocity, and ambient temperature

Answer

Heat index, dew point, and air movement

Question 6

In a free field, away from any reflecting surfaces, what is the theoretical reduction in sound pressure level every time the distance from a point source of noise is doubled?

Accepted Answer

6 dB

Answer

3 dB

Answer

10 dB

Answer

12 dB