Exam (elaborations)
OSHE 381 Test 2 Questions & Detailed Answers
- Course
- OSHE 381
- Institution
- University Of California - Berkeley
OSHE 381 Test 2 Questions & Detailed Answers
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OSHE 381 Test 2 Questions & Detailed Answers1. Fires
2. Explosions
3. Toxic releases - ANS Three most common chemical plant accidents:
Organic solvents - ANS _______________ are most common source of fires.
1) Fire and explosion properties of materials
2) The nature of the fire and explosion process
3) Procedures to reduce the hazards of fires and explosions - ANS To prevent fires
and explosions, you must be familiar with:
1) A special type of oxidation reaction
2) Exothermic - produces more energy (heat) than it uses - ANS A fire is a chemical
reaction known as combustion
The rate of energy release - ANS The difference between a fire and explosion
,smoldering - ANS Slow - ______________
(1) Produces:
(a) Heat
(b) Light - glowing
(c) Smoke - Product of incomplete combustion plus carbon monoxide
fire - ANS Fast - ___________
(1) Also known as conflagration
(2) Produces:
(a) Heat
(b) Light - flame
(c) Smoke - Products of incomplete combustion plus carbon dioxide
explosion - ANS Extremely fast - ___________
(1) Two types
(a) Deflagration
(b) Detonation
Produces:
(a) Heat
(b) Light - flash
(c) Pressure
(d) Smoke depends on the richness of the fuel/air mixture
, THE FIRE TRIANGLE
Three necessary components:
a. Fuel
b. Oxidizer
c. Ignition source - ANS A way of explaining the combustion reaction
If any of the three components is missing, fire cannot occur.
Fuel
sublimation - ANS 1. Can be gases, liquids or solids (See examples in text on page
157)
2. All fuels burn only as gases, however.
a. Gases - already there
b. Liquids
(1) Are converted by evaporation
(2) Produce vapors
c. Solids
(1) Can melt and then evaporate
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