NSC Chemical Safety 5

Question 1

Which agency must be notified when a reportable quantity of a hazardous substance is released into the environment?

Accepted Answer

The National Response Center (NRC) and local emergency planning committees

Answer

Under CERCLA and EPCRA, releases of hazardous substances at or above reportable quantities must be reported to the National Response Center and applicable local/state agencies.

Question 2

A 'sensitizer' chemical is hazardous because it can:

Accepted Answer

Cause an allergic reaction in subsequent exposures after initial sensitization

Answer

Sensitizers cause an allergic immune response; after initial exposure sensitizes a person, even tiny future doses can trigger severe reactions.

Question 3

What is the primary hazard of mixing bleach (sodium hypochlorite) with ammonia-based cleaners?

Accepted Answer

Generation of toxic chloramine gases

Answer

Mixing bleach with ammonia produces chloramine gases, which are toxic and can cause respiratory damage, chest pain, and at high levels, pulmonary edema.

Question 4

Under OSHA's Globally Harmonized System (GHS), which signal word indicates a LESS severe hazard category?

Accepted Answer

Warning

Answer

GHS uses 'Warning' for less severe hazard categories and 'Danger' for more severe ones; only these two signal words are used on GHS-compliant labels.

Question 5

Which of the following is a key requirement when storing flammable liquids in a safety cabinet?

Accepted Answer

The cabinet must be grounded and bonded and kept away from ignition sources

Answer

Flammable liquid storage cabinets must be properly grounded and bonded to prevent static discharge and kept away from ignition sources to prevent fires.

NSC Practice Test

NSC Practice Test

NSC Chemical Safety 5