CIH CIH Industrial Hygiene Sampling & Monitoring 3

Question 1

What is 'action level' as defined by most OSHA substance-specific standards?

Accepted Answer

Half the PEL, triggering monitoring and medical surveillance requirements

Answer

The immediately dangerous to life or health concentration

Answer

The concentration requiring respirator use

Answer

The TLV-C ceiling value

Question 2

Which sampling medium is used to collect acidic gases such as hydrogen chloride from workplace air?

Accepted Answer

Glass fiber filter with sodium carbonate

Answer

Charcoal tube

Answer

Silica gel tube

Answer

Polyurethane foam plug

Question 3

During a noise sampling campaign, a sound level meter set to 'slow response' and 'A-weighting' is used primarily to measure what?

Accepted Answer

Steady-state noise approximating human hearing sensitivity

Answer

Peak impulse noise levels

Answer

Low-frequency industrial vibration

Answer

Ultrasonic equipment emissions

Question 4

What is the minimum number of samples recommended by NIOSH to statistically characterize a similar exposure group (SEG)?

Accepted Answer

6

Answer

2

Answer

3

Answer

10

Question 5

What does a passive (diffusive) dosimeter rely on for sample collection rather than a pump?

Accepted Answer

Molecular diffusion across a stagnant air layer

Answer

Electrostatic precipitation

Answer

Gravitational settling of particles

Answer

Thermal precipitation

Question 6

Which type of sampling strategy is used when the goal is to measure the worst-case or highest likely exposure in a workday?

Accepted Answer

Worst-case or high-exposure sampling

Answer

Random grab sampling

Answer

Full-shift TWA sampling

Answer

Background baseline sampling