REHS 11 Hazardous Materials

What is the term for a statistical estimate of an oral dose of a chemical that produces a lethal effect on half of an animal population?

A. LC50
B. LD50
C. EC50
D. ED50

The dose-response relationship of a toxic substance depends on all of the following except the:

A. amount and concentration of the substance.
B. pH of the substance.
C. duration of exposure to the substance.
D. toxicity of the substance.

Which respiratory device provides the best protection?

A. Positive pressure respirator with a full face piece
B. Negative pressure respirator with a full face piece
C. Full-face canister respirator
D. Half-face respirator

The emergency planning and community right to know act requires the disclosure of all of the following except type of quantities of:

A. chemicals produced on site.
B. chemicals accidentally discharged into the atmosphere.
C. chemicals routinely discharged into the atmosphere.
D. all chemicals routinely discharged into the atmosphere.

For first responders at an incident, which one of the following is listed correctly according to order of importance?

A. Responder safety, environmental safety, public safety, property protection
B. Public safety, property protection, responder safety, environmental safety
C. Responder safety, public safety, environmental safety, property protection
D. Property protection, public safety, responder safety, environmental safety