Title: Ch. 5.2.2 Quiz
Course: Lab Safety > Section: Day 3

Adapted from Laboratory Safety by Hill and Finster, 2010 by Wiley

Q: In combustion reactions
- The fuel is reduced and the oxygen is oxidized
- The fuel and the oxygen are both oxidized
- The fuel and the oxygen are both reduced
- The fuel is oxidized and the oxygen is reduced
A: The fuel is oxidized and the oxygen is reduced

Q: Incomplete combustion arises from
- The absence of enough fuel and produces carbon dioxide in a reduced state
- The absence of enough oxygen and produces carbon dioxide in a reduced state
- The absence of enough fuel and produces carbon monoxide
- The absence of enough oxygen and produces carbon monoxide
A: The absence of enough oxygen and produces carbon monoxide

Q: With regard to sustaining life, which of the following are the three main dangerous results of a fire?
- The heat released
- Toxic by-products
- Reduced fuel levels
- Reduced oxygen levels
A: The heat released; Toxic by-products; Reduced oxygen levels

Q: The leading cause of death in a fire is due to
- Lack of oxygen
- Heat
- Inhalation of smoke
- None of the above
A: Inhalation of smoke

Q: At what oxygen level do humans start to show reduced physiological characteristics?
- 12.5%
- 14.0%
- 16.0%
- 19.0%
A: 16.0%

Q: A backdraft explosion can occur when
- There is a lack of fuel in a partially burned room
- There is a lack of oxygen in a partially burned room
- A door is opened into a room instead of opening into a hallway or outside
- A fire is very smoky
A: There is a lack of oxygen in a partially burned room

Q: The odorant in natural gas is usually
- An amine
- A phosphorus compound
- A mercaptan
- An ester
A: A mercaptan

Q: An explosion can occur when
- The rate of energy released in a chemical reaction is faster than the ability of the area to dissipate the energy through convection and heat capacity
- The rate of energy released in a chemical reaction is slower than the ability of the area to dissipate the energy through convection and heat capacity
- The energy released in a chemical reaction is almost exactly equal to the ability of the area to dissipate the energy through convection and heat capacity
- Any of the above
A: The rate of energy released in a chemical reaction is faster than the ability of the area to dissipate the energy through convection and heat capacity

Q: A BLEVE is an explosion where
- A container of flammable liquid has ruptured in the presence of an ignition source
- The flammable liquid in a container can no longer absorb enough heat to keep the container cool enough not to rupture
- A container has reached an internal pressure above the limit of the pressure relief valve
- All of the above
A: All of the above

Q: A BLEVE is not a likely lab event since
- Relief valves on compressed gases in labs will always prevent a BLEVE
- Special additives are present in high-pressure lab tanks that inhibit explosions
- It requires that there be an active fire impinging upon a sealed vessel containing a flammable liquid
- Vessels used in lab environments are constructed so that they cannot explode
A: It requires that there be an active fire impinging upon a sealed vessel containing a flammable liquid