HAZWOPER Hazard ID 3

Question 1

Which DOT placard shape indicates a compressed gas hazard?

Accepted Answer

Diamond (square on point)

Answer

DOT hazard placards are diamond-shaped (square rotated 45°), each colored and numbered to indicate the specific hazard class.

Question 2

What hazard does the UN number 1993 on a placard indicate?

Accepted Answer

Flammable liquid, n.o.s.

Answer

UN 1993 is assigned to flammable liquids not otherwise specified (n.o.s.), a common placard number seen at hazardous waste sites.

Question 3

Which condition BEST describes an IDLH (Immediately Dangerous to Life or Health) atmosphere?

Accepted Answer

An atmosphere posing immediate risk of death or irreversible health effects preventing escape

Answer

NIOSH defines IDLH as any atmospheric condition that poses an immediate threat to life, health, or the ability to escape.

Question 4

A drum at a contaminated site has a radioactive trefoil symbol. Which initial action is MOST appropriate?

Accepted Answer

Establish a buffer distance and contact a radiological health physicist

Answer

Radioactive materials require specialized expertise; the first response is to maintain distance and involve qualified radiological personnel.

Question 5

Which property of a chemical determines how quickly it evaporates and contributes to inhalation hazard?

Accepted Answer

Vapor pressure

Answer

Vapor pressure measures how readily a substance vaporizes at a given temperature; higher vapor pressure means faster evaporation and greater inhalation risk.

(HAZWOPER) Certified HAZWOPER 40-Hour Instructor Practice Test

(HAZWOPER) Certified HAZWOPER 40-Hour Instructor Practice Test

HAZWOPER Hazard ID 3