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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. Length / Time






2. A pull on an object






3. 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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4. Exhaust of combustion products






5. Describes how applied forces bring a body into rest or equilibrium






6. (pi) x (radius)^2






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






8. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width






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






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






11. Ignition - power stroke






12. Rotation may occur






13. ...






14. A flat - sloping surface -The only simple machine that does not move -The force is applied to the ramp - since this is the direction the load weight is moved -Sloping side is longer than vertical side -Less force is required to accomplish the same am






15. 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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16. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2






17. Length x Width x Height






18. What we are studying






19. The branch of science and engineering involving measurement






20. One that pushes on an object






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






22. If the force needed to operate the machine (input force) is less than the force being opposed or the load being moved (output force) -The ratio of the output force divided by the input force -If the number is greater than one - there is a mechanical






23. Force x Distance






24. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2






25. Can be applied at a time on an object






26. Mass x acceleration






27. Air is drawn in






28. Describes how applied forces bring a body into motion






29. Combustion of fuel mixture ignited by spark plug






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






31. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components






32. A combination of components






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






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






35. Exhaust






36. Mass can neither by created nor destroyed - only transformed






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






38. Body in motion (car)






39. Liquid or gas






40. 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






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






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






43. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda






44. When the moving fluid is a gas






45. What we are not studying






46. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human






47. Three- dimensional property measured in units of length times length times length =length x width x height






48. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous






49. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)






50. Force without machine/Force with machine