Smoke detectors save thousands of lives every year. A fire can start in the most unexpected places, so it is important to be prepared. Take this smoke detector quiz to see how much you know about these life-saving tools.
How many residential fires occur in the U.S. each year?
Which of the following appliances are responsible for many fires?
Which of the following is more likely to cause a fire?
What sort of clothing should you wear when cooking?
clothing with strings hanging off it
With a 1 in 300 chance that your house will catch fire, the importance of smoke detectors becomes obvious. How much do the cheapest smoke detectors cost?
What sort of battery does a smoke detector need?
Photoelectric and ionization detectors are the two most common types of smoke detectors. How does smoke trigger a photoelectric detector?
It creates a light signal.
It bends a light signal.
It blocks a light signal.
Why does the light sensor in a smoke detector need to be at a 90 degree angle to the light beams?
to a make it more sensitive
to make it cheaper
to make it bigger
Which type of radioactive element is used in an ionization detector?
How long is the half-life of americium?
What is a curie?
a type of radioactive material
a unit of measure for radioactive material
a bond between radioactive materials
What type of nuclear radiation is emitted by americium-241?
What do the alpha particles do to the oxygen and nitrogen atoms in the chamber of a smoke detector?
They radiate them.
They ionize them.
They burn them.
In addition to a radioactive source, an ionization detector contains two plates with a battery-supplied voltage across them. What is attracted to the plate with negative voltage?
positively charged atoms
negatively charged electrons
neutral oxygen and nitrogen particles
How does smoke affect the electrical current in a smoke detector?