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Mechanical Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Compression-Tension-Shear






2. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force






3. Compression of fuel mix






4. Length x Width x Height






5. Movement along a line (reciprocal or linear motion) -Units: feet and meters






6. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied






7. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)






8. Dimensions and units






9. One that pushes on an object






10. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)






11. Friction changes KE to heat energy- Heat is transferred to air- Front brakes work harder than rear- Some brakes use asbestos- Newer cars have dual braking systems - Don't drive through water or your brakes won't work well (ride breaks to dry them out






12. A quantity that has both magnitude and direction when placed within a coordinate system -Forces and Velocity i.e. driving 50 miles to the northeast






13. Air is compressed - work is done on the system






14. What we are studying






15. The branch of science and engineering involving measurement






16. A combination of components






17. Length x Width






18. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment






19. Force without machine/Force with machine






20. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved






21. Can be applied at a time on an object






22. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us

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23. Rotation will not occur - but translation might occur






24. Same pressure - work - volume - Different forces and distances






25. An indication of kinetic energy of mass at the molecular level






26. Force and mass are proportional to each other (F=ma) -If F increases - so does acceleration -Force causes acceleration - More force means more acceleration - same mass - More mass means less acceleration - same force

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27. ...






28. (Force)(Distance)/Seconds






29. Combine two or more power sources - locomotives - buses (diesel- electric) -Submarines (Nuclear- electric) -Components:gas engine - fuel tank - electric motor - generator - batteries - transmission -2 motors: Internal Combustion Engine and Electric E






30. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S






31. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet






32. Intake of fuel and air mixture - compression of mixture by piston






33. Applied at an angle or parallel to a surface






34. A pull on an object






35. An application of Pascal's Principle (trading distance and force while doing the same amount of work) -Gives a mechanical advantage -The muscles of machines - used to produce very large forces - use a fluid under pressure (gas is low pressure and liq






36. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion

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37. When the moving fluid is a gas






38. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human






39. The designing of machines that contribute to society and our quality of life - Mechanical engineers apply the principles of mathematics - chemistry - and physics to solve real- world problems






40. Piston travels down and intake valve is opened. Intake of fuel and air into chamber






41. Body at rest or is in equilibrium (wall)






42. Describes a physical property of anything - What we are measuring






43. A^2+b^2=c^2






44. Two stroke- Four Stroke- Diesel-Rotary -Hybrid






45. Varies by location (on earth) - distance (from earth) - and mass (of planet)






46. ICE generates electricity for electric battery -Electric motor turns wheels






47. The force simple machines use to do work on a single load or against a single force






48. When the work done by the effort just equals the work done by the load - ______ of the machine will occur






49. More compact (size of beer keg) - No valves -Benefits: fewer parts - lower engine weight Problems: seal - lower inertia forces -1 rotar=3 to 4 pistons






50. Static - Dynamic