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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. (Force)(Distance)/Seconds






2. Translation (slide) -Rotate -Slide and Rotate Together






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






4. 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






5. A pull on an object






6. 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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7. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing






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






9. 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






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






11. (pi) x (radius)^2






12. Intake of fuel and air mix






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






14. When fluid is at rest






15. One that pushes on an object






16. Air is drawn in






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






18. Length x Width x Height






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






20. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force






21. Combustion of fuel mixture ignited by spark plug






22. The standard system of units that uses base 10 and used in the rest of the world. US does not use - but Great Britain does - Base Units: mass - kilograms (kg) - length- meters (m) - and time-Seconds (S) - Force is a derived unit measured in newtons (






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






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






26. Psi - newtons - pascals






27. 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






28. Compression-Tension-Shear






29. Length x Width






30. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline






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






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






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






34. A system adopted from an old British system of units in the 13th century -Engineering system -Units: length- foot (ft) - time- second (s) - force-(lbs) - Mass is a derived unit called a slug -Political/Economic choice -Awkward






35. Force without machine/Force with machine






36. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N






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






38. Piston travels up and exhaust valve opens. Combustion by product exhaustion






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






40. Force x Distance






41. Piston travels up and both plugs are closed






42. Tells us how fast work is done - varies with time (more power is needed to do work in less time - and less power is needed to do work in more time) =Fd/s -Units: USA: ft- lb/s SI: watts (J/S)






43. A combination of components






44. Allows comparison between different measuring systems and units - Necessary to market internationally






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






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






47. Often a free body has _______ acting on it






48. 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






49. The amount of atoms and molecules in something - Matter is energy that has become solid -An object gains mass when it gains more energy and vice a versa -Units: SI- kgs and USA: Slugs - lbs






50. Work/force or vertical distance/sloping distance