CIH Toxicology & Health Risk Assessment 3

Question 1

The International Agency for Research on Cancer (IARC) classifies Group 1 carcinogens as:

Accepted Answer

Carcinogenic to humans (sufficient evidence)

Answer

IARC Group 1 includes agents with sufficient evidence of carcinogenicity in humans, meaning there is convincing scientific evidence of a causal relationship.

Question 2

The Short-Term Exposure Limit (STEL) specifies the maximum concentration permitted for a period of:

Accepted Answer

15 minutes, no more than four times per shift

Answer

The STEL is the concentration not to be exceeded during any 15-minute period, with a maximum of four such excursions per shift and at least 60 minutes between excursions.

Question 3

A reproductive toxin is best defined as a substance that:

Accepted Answer

Adversely affects fertility, pregnancy, or development of offspring

Answer

Reproductive toxins are chemicals that can impair fertility, cause adverse effects on sexual function, or harm the development of offspring including teratogenic effects.

Question 4

What is the fundamental difference between 'hazard' and 'risk' in health risk assessment?

Accepted Answer

Hazard is the potential to cause harm; risk is the probability of harm occurring under specific conditions

Answer

Hazard refers to the intrinsic potential of an agent to cause harm, while risk accounts for the likelihood and magnitude of harm given the actual exposure conditions.

Question 5

In toxicokinetics, the term 'half-life' of a chemical in the body refers to:

Accepted Answer

The time required for the body to eliminate half of the absorbed chemical

Answer

Biological half-life is the time required for the concentration of a chemical in the body to decrease by 50% through metabolic and excretory processes.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH Toxicology & Health Risk Assessment 3