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This quiz consists of 5 multiple choice and 5 short answer questions through Part 2, Harnassing the Elements, Introduction, Floating, Flying and Pressure Power, pp.91-141.

Multiple Choice Questions

1. What is the most common form of inclined plane found in machines?
(a) The rods.
(b) The rocker.
(c) The wedge.
(d) The pully.

2. What is a first-class lever?
(a) Where the effort is a greater distance from the fulcrum than the load.
(b) Where the distance is further from the fulcrum than the effort.
(c) Where there is no load needed for the effort.
(d) Where the effort and the load are equal distances from the fulcrum.

3. What does the picture of a mammoth pulling a merry-go-round illustrate?
(a) Blocks and tackles.
(b) Levers.
(c) Gears and belts.
(d) Wedges.

4. Upon what principle does a pulley work?
(a) It is easier to pull something down rather than up.
(b) It is easier to overcome gravity than force.
(c) The rotation of one gear pulls the other.
(d) The amount of work required is halved by the amount of effort.

5. What is a wheel and rod attacked by a hinge?
(a) A crank.
(b) A prank.
(c) A spur.
(d) A worm.

Short Answer Questions

1. What controls direction on a ship?

2. The rack and pinion is an example of ______________.

3. How does a ship vary in density?

4. Why is cold water denser than warm water?

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

(see the answer key)

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