CIH CIH Industrial Hygiene Sampling & Monitoring 2

Question 1

Which instrument is most commonly used for real-time measurement of particulate matter in workplace air?

Accepted Answer

Direct-reading aerosol photometer

Answer

Gas chromatograph

Answer

Flame ionization detector

Answer

Infrared spectrometer

Question 2

What particle size fraction is collected by an inhalable particulate matter sampler?

Accepted Answer

Particles up to 100 µm aerodynamic diameter

Answer

Particles <1 µm

Answer

Particles <4 µm

Answer

Particles <10 µm

Question 3

The ACGIH threshold limit value (TLV-STEL) represents maximum exposure for what duration?

Accepted Answer

15 minutes

Answer

30 minutes

Answer

60 minutes

Answer

4 hours

Question 4

What is the purpose of a blank sample in an industrial hygiene sampling campaign?

Accepted Answer

To detect contamination from media preparation or field handling

Answer

To calibrate the pump flow rate

Answer

To measure the detection limit of the instrument

Answer

To set the upper range of the analytical curve

Question 5

Which pump flow rate is typically used for collecting respirable dust using a 10-mm Dorr-Oliver cyclone?

Accepted Answer

1.7 L/min

Answer

0.5 L/min

Answer

2.5 L/min

Answer

5.0 L/min

Question 6

What does a detector tube (colorimetric tube) measure in workplace air sampling?

Accepted Answer

Approximate gas or vapor concentration via color change

Answer

Particle mass concentration

Answer

Exact analyte identity using chromatography

Answer

Radiation dose equivalent