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This quiz consists of 5 multiple choice and 5 short answer questions through Part Four: Electricity and Automation.

Multiple Choice Questions

1. What pumps refrigerant out in an air conditioner?
(a) Oscillator.
(b) A solenoid.
(c) A gear.
(d) A compressor.

2. What does a driving force initiate?
(a) Electron activity.
(b) Movement.
(c) Inertia.
(d) Work.

3. What happens to the charge of an electron in a static electricity situation?
(a) The charge reverses.
(b) The charge becomes neutral.
(c) The charge oscillates between negative and neutral.
(d) The charge oscillates between positive and neutral.

4. What is frequency?
(a) How often one wave moves past a peak of energy.
(b) How often a wave is generated.
(c) How often a wave begins moving after encountering a barrier that stops it.
(d) How quickly a wave moves past each peak of energy.

5. What is one example the author uses of a wedge?
(a) A type of door stop.
(b) A ship's ramp.
(c) An escalator.
(d) A block and tackle system.

Short Answer Questions

1. In flying, what is used to overcome weight from gravity?

2. What is the density of salt water compared to fresh water?

3. What is the effort you put in combined with the distance over which the effort is done?

4. What happens when you exert your strength across a longer distance?

5. What is one type of ray that human eyes cannot perceive?

(see the answer key)

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