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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 is the resistance of an object to any change in its speed or direction?
(a) Inertia.
(b) Gravity.
(c) Lift.
(d) Propulsion.

2. The rack and pinion is an example of ______________.
(a) A stifle.
(b) A lever.
(c) A wedge.
(d) A gear.

3. Upon what does the amount of upthrust of an object in water depend?
(a) On what the object's salinity is.
(b) On what the water's electrical charge is.
(c) On whether or not the object is greater than one centimeter in diameter.
(d) On how much water the object displaces.

4. In which direction do electrons always travel?
(a) From positive to negative.
(b) From true north to magnetic north.
(c) From magnetic north to magnetic south.
(d) From negative to positive.

5. What is it called when filters block out all the rays except ones vibrating in a chosen field?
(a) Optimization.
(b) Polarization.
(c) Inversion.
(d) UV absorbtion.

Short Answer Questions

1. What causes electrons to move?

2. What is applied to a lever to make it move?

3. What causes sideways movements of a ship?

4. How does a zipper operate?

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

(see the answer key)

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