CESCO Risk Assessment and Management 2

Question 1

Under OSHA's Process Safety Management standard (29 CFR 1910.119), how often must a process hazard analysis (PHA) be updated and revalidated?

Accepted Answer

At least every 5 years

Answer

1910.119(e)(6) requires the PHA to be updated and revalidated at least every five years.

Question 2

Which PHA technique systematically applies guidewords such as 'no,' 'more,' 'less,' and 'reverse' to process design parameters?

Accepted Answer

HAZOP

Answer

HAZOP pairs guidewords with parameters like flow, pressure, and temperature to identify deviations from design intent.

Question 3

Which of the following are the four steps of the EPA human health risk assessment process, in order?

Accepted Answer

Hazard identification, dose-response assessment, exposure assessment, risk characterization

Answer

EPA's framework, based on the 1983 NRC 'Red Book,' runs from hazard identification through risk characterization.

Question 4

In the EPA dose-response framework, a hazard quotient (HQ) greater than 1 indicates what?

Accepted Answer

Exposure exceeds the reference dose and non-cancer effects may be possible

Answer

HQ is the exposure dose divided by the RfD, so a value above 1 signals potential for adverse non-cancer effects.

Question 5

A risk that remains after all planned control measures have been implemented is called what?

Accepted Answer

Residual risk

Answer

Residual risk is what remains after controls are in place and must be judged acceptable or further reduced.

CESCO - Certified Environmental, Safety and Compliance Officer Practice Test