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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 do sensors and detectors measure?
(a) Only light rays.
(b) Electrical currents, rays, and waves.
(c) Only electrical currents.
(d) Only electrical waves.

2. How does a wedge move an object up an inclined plane?
(a) It lowers the plane so the object slides.
(b) It uses the effect of gravity.
(c) It doesn't ; the wedge moves the plane itself to raise an object.
(d) It forces the object to reduce the effects of gravity.

3. What occurs when molecules begin vibrating in a solid, then speed up their vibration when heated?
(a) Conduction.
(b) Radiation.
(c) Solid combustion.
(d) Internal combustion.

4. What is essential for running an autopilot program?
(a) Feedback.
(b) The right semiconductor.
(c) The correct electrical charge.
(d) A positive electrical charge.

5. What two elements combine to make a body scanner?
(a) Sound waves and radio waves.
(b) Magnetic fields and light waves.
(c) Radio waves and magnetic fields.
(d) Magnetic fields and sound waves.

Short Answer Questions

1. What imparts movement into the air or water around them on a ship?

2. What debris does a nuclear explosion create?

3. Why do electromagnets use the forces of attraction and repulsion alternately to keep machines running?

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

5. What does a convex lens do?

(see the answer key)

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