HAZWOOPER 40 FINAL EXAM AND PRACTICE

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HAZWOOPER 40 FINAL EXAM AND PRACTICE

EXAM NEWEST ACTUAL EXAM 600

QUESTIONS AND CORRECT DETAILED

ANSWERS (VERIFIED ANSWERS) |A+ GRADED

Most hazardous waste sites contain a variety of chemical substances in various forms. Which are included? - ANSWER- Gas Liquid Solid

Substances can enter the unprotected body by: - ANSWER-

Inhalation skin absorption ingestion injection

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What do we know about symptoms resulting from chronic exposures? - ANSWER-May not appear for several years or decades after exposure Usually relate to low concentrations over a long period of time

Chemical exposures are generally divided into two categories - ANSWER-acute and chronic

To protect against the hazard of fire or explosion: - ANSWER-

Have qualified personnel field monitor for explosive atmospheres and flammable vapors Use non-sparking, explosion-proof equipment

Explosions and fires may arise spontaneously, but usually they

result from activities such as: - ANSWER-Accidentally mixing

chemicals Introducing and ignition source Moving drums

There are many potential causes of explosions and fires at hazardous waste sites. Which of the following is a good example? - ANSWER-Chemical reactions that produce explosion, fire, or heat 2 / 4

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What do we know about oxygen? - ANSWER-Oxygen is heavier than air Oxygen is a strong oxidant which generates fire hazards If oxygen is present there must be NO uncontrolled contact with flammables Concentrations of 19.5% or lower are deficient

Oxygen deficiency may result from - ANSWER-The displacement of oxygen by another gas the consumption of oxygen by a chemical reaction

What is the lowest concentration of oxygen allowed? -

ANSWER-16%

What are the three basic ways to protect yourself from radiation?

• ANSWER-Reduce time of exposure

Increase distance from exposure Use shielding

Which radiation causes serious damage to the body? - ANSWER-Gamma 3 / 4

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Background levels of radiation are - ANSWER-0.01-0.02 mrem/hr

Which radiation causes harmful burns to the skin? - ANSWER- Beta

Protection for vertical drops: - ANSWER-Guardrails, safety net

systems, and personal fall arrest systems

It is better to use fall prevention systems than fall protection systems because - ANSWER-Prevention systems provide more positive safety means

What are the three important elements to prevent heat stress? - ANSWER-Water Rest Shade

Symptoms of heat illness - ANSWER-Heat rash fainting heat cramps heat exhaustion heat stroke

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