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

Multiple Choice Questions

1. What principle does a thermostat use?
(a) The principle that heat causes expansion.
(b) The principle of entropy.
(c) The third principle of thermonectics.
(d) The law of electronic fission.

2. What are the effects of electricity?
(a) Only light.
(b) It depends on the amperage.
(c) Heat, light, and magnetism.
(d) Only magnetism.

3. What is the term for the process of molecules moving further apart in convection?
(a) Expansion.
(b) Inference.
(c) Trajection.
(d) Acceleration.

4. What do compound levers contain?
(a) A single fulcrum and two points of force and two of load.
(b) No fulcrum but two points of force and two of load.
(c) Two fulcrums and two points of force and two of load.
(d) Two fulcrums and one point of force and load.

5. What is any engine that burns fuel inside the engine?
(a) Nuclear fusion engine.
(b) Internal combustion engine.
(c) Thermodynamic engine.
(d) Steam engine.

6. How does a ship vary in density?
(a) According to its load.
(b) According to how much water is on board.
(c) According to how long it takes to get underway.
(d) According to the speed it is making.

7. What emits both infrared and light rays?
(a) A planet.
(b) The sun.
(c) A light bulb.
(d) The moon.

8. What is an object's weight divided by its volume?
(a) An object's density.
(b) The object's constant mass.
(c) An object's elemental number.
(d) The object's ability to exert force.

9. What is convection?
(a) The way a molecule radiates heat.
(b) When heat causes wind.
(c) Heat moving from a liquid or gas molecule to another.
(d) When heat increases velocity.

10. What do you have to use in order to accomplish work with half the effort?
(a) Half the distance.
(b) One-third the distance.
(c) Ten percent of the distance multiplied by one-third of the effort.
(d) Twice the distance.

11. How does a zipper operate?
(a) Just using triangular wedges.
(b) It is not a wedge system, but rather a rolling arc system.
(c) Just lower curved wedges.
(d) The use of triangular wedges and lower curved wedges.

12. Where is steam still used?
(a) In some internal combustion engines.
(b) In thermal power stations.
(c) In water plants.
(d) In industrial engines.

13. What causes expansion?
(a) Gravity.
(b) Inertia.
(c) Cold.
(d) Heat.

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

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

Short Answer Questions

1. How does a rocket engine power the craft?

2. What does the picture of a mammoth pulling a merry-go-round illustrate?

3. When an object absorbs light rays, how is the energy held in the object?

4. What causes increased heat in the process of conduction?

5. What happens when molecules are squeezed or stretched beyond the boundaries of their comfortable balance?

(see the answer keys)

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