ASP ASP Hazardous Materials and Chemical Safety 5

Question 1

A worker is exposed to a chemical mixture containing two substances with additive effects. The combined exposure index (CEI) is calculated as:

Accepted Answer

C1/TLV1 + C2/TLV2

Answer

For additively acting chemicals, the combined exposure index is the sum of each component's concentration divided by its TLV; a sum >1 indicates overexposure.

Question 2

Which GHS pictogram indicates an acute toxicity hazard (oral, dermal, or inhalation)?

Accepted Answer

Skull and crossbones

Answer

The skull and crossbones pictogram is used for substances with severe acute toxicity (categories 1–3).

Question 3

Under RCRA, which characteristic makes a solid waste hazardous due to its potential to cause explosions or fire?

Accepted Answer

Ignitability

Answer

Ignitability is the RCRA characteristic applied to wastes that can readily catch fire, including flammable liquids with flash point <60°C.

Question 4

What does the term 'threshold limit value – short-term exposure limit' (TLV-STEL) represent?

Accepted Answer

15-minute concentration that should not be exceeded

Answer

The TLV-STEL is the concentration to which workers can be exposed for up to 15 minutes without suffering irritation, chronic tissue damage, or narcosis.

Question 5

Which agency publishes the Emergency Response Guidebook (ERG) used by first responders at hazmat incidents?

Accepted Answer

DOT/PHMSA

Answer

The ERG is published by the US DOT's Pipeline and Hazardous Materials Safety Administration (PHMSA) in cooperation with Transport Canada and Mexico's SCT.

(ASP) Associate Safety Professional Practice Test

(ASP) Associate Safety Professional Practice Test

ASP ASP Hazardous Materials and Chemical Safety 5