Title: Ch. 2.1.2 Safety Quiz
Course: Lab Safety > Section: Day 1

Adapted from "Laboratory Safety for Chemistry Students" by Hill and Finster, 2010 by Wiley

Q: The best way to learn how to use a fire extinquisher is to
- Use one during a real fire emergency
- Read the label on the exinguisher
- Practice using a fire extinquisher during a training course
- Practice using a fire extinguisher anytime you are not busy during a lab experiment
A: Read the label on the exinguisher

Q: If some organic solvent has spilled onto an operating hot place and caught fire, what class of fire is this?
- B only
- C only
- B and C
- A and C
A: B and C

Q: What part of the fire tetrahedron was not origianlly included in the fire triangle?
- Fuel
- oxidizing agent
- ignition source
- chain reaction
A: chain reaction

Q: Most fire prevention methods involve the elimination of what part of the fire tetrahedron?
- Fuel
- Oxidizing agent
- Ignition source
- Chain reaction
A: Ignition source

Q: What phase of matter burns?
- Solid
- Liquid
- Gas
A: Gas

Q: Water is a useful extinguishing agent on what class(es) of fire?
- Only A
- A and B
- A and C
- Only D
A: Only A

Q: Why are pressurized water extinguiseher not found in chemistry laboratories?
- They are too expensive
- They are too heavy for some people to operate
- Most lab fires are Class B or Class C fires.
- Most lab fires are Class D fires
A: Most lab fires are Class B or Class C fires.

Q: Why is a carbon dioxide extinguisher not always effective against a Class A fire?
- The CO2 will further "feed" the Class A fire.
- The fire might momentarily be extinguished but the hot fuel can reignite when air hits the fire
- Carbon Dioxide cannot cool the flames enough
- They typically last only 10-15 seconds, which is not long enough to extinguish the fire.
A: The fire might momentarily be extinguished but the hot fuel can reignite when air hits the fire

Q: BC fire extinguishers work by
- Cooling the fire
- Stopping the chain reaction
- Preventing vaporization of a flammable liquid
- "Deactivating" the fuel
A: Preventing vaporization of a flammable liquid

Q: Why is the most handy fire extinguisher in a chemistry lab almost always the appropriate fire extinguisher?
- It is the cheapest to use, and therefore easily replaced
- It is probaby an ABCD extinguisher that works on all classes of fires
- Fire code requires that available fire extinguishers be the appropriate type for the most likely type of fire
- It is the type of extinguisher that most folks know how to use
A: Fire code requires that available fire extinguishers be the appropriate type for the most likely type of fire

Q: Portable fire extinguishers typically discharge for about
- 5-10 seconds
- 10-30 seconds
- 30 seconds to a few minutes
- 5-10 minutes
A: 30 seconds to a few minutes

Q: When using a fire extinguisher it is best to
- Use it only in "short bursts" until the fire is out
- Use it continuously until the fire is out
- Discharge the entire extinguisher to optimize the use of the extinguishing agent
- Discarge it until it starts to make too much of a mess
A: Discharge the entire extinguisher to optimize the use of the extinguishing agent

Q: The best extinguisher agent for a person on fire is
- Type BC
- Type ABC
- Water
- Type ABCD
A: Water