Mechanical Comprehension Test
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Mechanical Comprehension Test
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25 Questions

1. What units are used to measure velocity?
2. What mechanical device could be used to transfer water from tank #1 to tank #2?
3. A bicycle wheel has a diameter of 1.9 feet and a circumference of 6 feet. A girl rides this bicycle for two revolutions of this wheel. How far down the driveway does she travel?
4. An elevator is most similar to which of the following mechanical devices?
5. A spring is most likely to be used on which of the following?
6. The center of gravity of a baseball bat would be best described as
7. Steve has a lever whose pivot point is 3 feet from the 50-pound box he wants to lift. Steve is standing at the other end of the lever- 6 feet from the pivot point. How much force must he apply to lift the box?
8. Which of the following best explains why wood floats on water?
9. Which is heavier- five pounds of feathers or five pounds of lead?
10. If each of the following objects weighed the same- which would be easiest to drag?
11. In the diagram above- all valves are initially closed. Gravity will cause the water to drain down into the barrels when the valves are opened.Which barrels will be filled if valves A- B- E- F- and G are opened and valves C and D are left closed?
12. Which material is best suited for use as a boat anchor?
13. How can gears be used to change the speed of a machine?
14. In the diagram above- how much must block A be raised to allow block B to rest on the floor beneath it?
15. A bridge spans 100 feet. It is supported by Pier A on the right and Pier B on the left and has no center or intermediate supports. If a truck is at the center of the bridge- which statement best describes the structural support system of the bridge?
16. Three springs are arranged in parallel between a wall and a rigid block- as shown above. The spring constants are 5 pounds per inch- 12 pounds per inch- and 5 pounds per inch respectively. What force is required to move the block 2 inches to the right?
17. Why do large steel ships float?
18. Chains and belts are used in mechanical systems to do which of the following tasks?
19. Frank must lift a 200-pound box using a lever. How many pounds of force must Frank apply to the right side of the lever to lift the box? w _x0003_ d1 = f _x0003_ d2
20. A steel bar is transferred from a freezer at 30 degrees Fahrenheit to a room at 70 degrees Fahrenheit. The bar will
21. A submarine would be most likely to use which of the following to aid in decreasing its submergence while under water?
22. In the diagram above- gears A- B- and C are connected by a chain. The diameters of the gears are 1 inch- 2 inches- and 4 inches respectively. If gear A is turning at 20 revolutions per minute (RPM)- what is the turning rate of gear C?
23. A block of wood rests on a level surface.What mechanical principle makes it more difficult to push this block sideways if the surface is made of sandpaper than if it is made of glass?
24. Which of the following are types of springs?
25. A hoist is typically used for which of the operations shown below?

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