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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) A gear.
(b) A compressor.
(c) A solenoid.
(d) Oscillator.

2. What principle is in use as a propeller pushes the water back and as that same water which has been pushed back rolls forward again and hits the propeller?
(a) The Principle of Push and Thrust.
(b) The Principle of Gravity.
(c) The Principle of Action and Reaction.
(d) The Principle of Force and Inertia.

3. What is created when heating an object to the point that it burns or glows, or by passing an electric current through a vapor or gas?
(a) Sounds at higher than average frequencies.
(b) Sounds at lower than average frequencies.
(c) A chemical reaction.
(d) Artificial light.

4. What is the absence of any light?
(a) Purple.
(b) Yellow.
(c) White.
(d) Black.

5. Where can the electromagnetic fields exist that sound waves cannot?
(a) Outside of matter.
(b) In the brain.
(c) In a vacuum.
(d) Through dense matter.

Short Answer Questions

1. What is one component of a lever?

2. What makes waves different from molecules?

3. What are different level marks for different types of water on the side of a ship called?

4. What is one step in creating liquid crystal displays?

5. What occurs when molecules begin vibrating in a solid, then speed up their vibration when heated?

(see the answer key)

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