HAZWOPER Lesson 4 - Hazard
Recognition Exam Questions &
Answers (Grade A+)
When responders must make a critical judgment about acceptance
of risk level or potential action necessary to lower risk. This
defines? -
correct answer ✅Safety
True or False/ Ways to prevent electrical accidents include burying
electrical cables at least four feet below the surface and double
fastening overhead electrical lines? -
correct answer ✅False
OSHA requires the use-air supplied respirators at concentrations of
what percent? -
correct answer ✅19.5%
A hazard is defined as what? -
correct answer ✅The capability of something causing you harm
If workers are unable to communicate and are distracted, the
chances of being injured increase. The effects of noise can include?
A) Inability to communicate
B) Workers being startled, annoyed or distracted
, HAZWOPER Lesson 4 - Hazard
Recognition Exam Questions &
Answers (Grade A+)
C) Physical damage to the ear, pain, temporary or permanent
hearing loss
D) All of the Above -
correct answer ✅All of the Above
The number '4' in the red section of the NFPA sign indicates the
material is what? -
correct answer ✅Extremely Flammable
True or False/ Allowing unqualified personnel to monitor for
explosive atmospheres is acceptable during emergencies -
correct answer ✅False
What is defined as any substance, situation or condition that is
capable of harming human health, property or the environment -
correct answer ✅A Hazard
The yellow section of the NFPA sign indicates the material is -
correct answer ✅Reactive
Recognition Exam Questions &
Answers (Grade A+)
When responders must make a critical judgment about acceptance
of risk level or potential action necessary to lower risk. This
defines? -
correct answer ✅Safety
True or False/ Ways to prevent electrical accidents include burying
electrical cables at least four feet below the surface and double
fastening overhead electrical lines? -
correct answer ✅False
OSHA requires the use-air supplied respirators at concentrations of
what percent? -
correct answer ✅19.5%
A hazard is defined as what? -
correct answer ✅The capability of something causing you harm
If workers are unable to communicate and are distracted, the
chances of being injured increase. The effects of noise can include?
A) Inability to communicate
B) Workers being startled, annoyed or distracted
, HAZWOPER Lesson 4 - Hazard
Recognition Exam Questions &
Answers (Grade A+)
C) Physical damage to the ear, pain, temporary or permanent
hearing loss
D) All of the Above -
correct answer ✅All of the Above
The number '4' in the red section of the NFPA sign indicates the
material is what? -
correct answer ✅Extremely Flammable
True or False/ Allowing unqualified personnel to monitor for
explosive atmospheres is acceptable during emergencies -
correct answer ✅False
What is defined as any substance, situation or condition that is
capable of harming human health, property or the environment -
correct answer ✅A Hazard
The yellow section of the NFPA sign indicates the material is -
correct answer ✅Reactive
