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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. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert






2. Exhaust






3. 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






4. Pistons connected to crankshaft -1 stroke up - 1 stroke down of the piston -1 rotation of the piston -Problems: high emissions - noisy - inefficient - high vibrations - unburnt fuel - burnt oil -Benefits: small and light -Being phased out in USA - i.






5. Force/Area






6. Describes how applied forces bring a body into motion






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






8. Mechanics is an application of math that describes how forces affect a body






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






10. Can be applied at a time on an object






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






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






13. Weight/Time






14. What we are not studying






15. Compression of fuel mix






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






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






18. Length / Time






19. Length x Width






20. ...






21. Intake of fuel and air mix






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






23. 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






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






25. A combination of components






26. 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






27. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components






28. Length x Width x Height






29. 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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30. Combustion ignited by spark plug and materials are compressed






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






32. The magnitude of something in a particular direction






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






34. 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






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






36. Static - Dynamic






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






38. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute






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






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






41. 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






42. Rotation may occur






43. Applied at an angle or parallel to a surface






44. Often a free body has _______ acting on it






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






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






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






48. When fluid is at rest






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






50. 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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