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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

1. Through what can heat not travel?
(a) A vacuum.
(b) Very dense elements.
(c) Very porous elements.
(d) There is nothing through which heat cannot travel.

2. What are two things a sail can do for a craft?
(a) Lift and Slow.
(b) Propel and stop.
(c) Propel and repel.
(d) Give pulpulsion and direction.

3. How many types of gears are there?
(a) One.
(b) Seven.
(c) Five.
(d) Four.

4. What happens if the edges of the two wheels touch?
(a) The one wheel will wear out faster than the other.
(b) Nothing unless they have cams.
(c) The one will stop the other wheel.
(d) The rotation of one will cause the other to rotate.

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

6. What debris does a nuclear explosion create?
(a) None.
(b) Steam.
(c) Fallout.
(d) Acid rain.

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

8. How does floating harness the power obtained by squeezing or stretching molecules?
(a) By gathering the individual electrons that are released.
(b) By energy "floating" through atomic fields and breaking the bonds to release energy.
(c) Through the form of upthrust.
(d) By squeezing an atom to split the proton and neutron.

9. What is electricity flowing through a wire?
(a) Current.
(b) Watts.
(c) Resistance.
(d) Ohms.

10. What causes sideways movements of a ship?
(a) Thrusters and stabilizers.
(b) Rods.
(c) Jone's principle.
(d) Cams.

11. What controls the movement in a gear system?
(a) The inertia needed to be overcome.
(b) The rotation of the gear.
(c) The size of the belt.
(d) The size of the gear.

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

13. In flying, what is used to overcome weight from gravity?
(a) Lift created by the rudder.
(b) Lift created by the nose.
(c) Lift created by the tiller.
(d) Lift created by the airfoil.

14. What are small propellers mounted in the base of a ship's hull?
(a) Thrusters.
(b) Stablizers.
(c) Rudders.
(d) Tillers.

15. How many forces hold things together?
(a) Two.
(b) One.
(c) Three.
(d) Four.

Short Answer Questions

1. What are the effects of electricity?

2. What is one component of a lever?

3. Upon how many major principles do propellers and rudders work?

4. What does the inclined plane do?

5. What is the transfer of heat through infrared rays?

(see the answer keys)

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