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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. A pull on an object






2. The magnitude of something in a particular direction






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






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






5. Combustion of fuel mixture ignited by spark plug






6. Ignition - power stroke






7. 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






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






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






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






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






12. 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 (






13. Rotation may occur






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






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






16. Rotation will not occur - but translation might occur






17. Mass x acceleration






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






19. Intake of fuel and air mix






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






21. Psi - newtons - pascals






22. Force/Area






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






24. 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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25. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller






26. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid

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27. 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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28. External Combustion engine -Only used in factories and plants (not used in cars)






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






30. Air is drawn in






31. Describes how applied forces bring a body into motion






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






34. Exhaust






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






36. 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






37. Used in cars -2 rotations of crankshaft -4 strokes (down - up - down - up) of piston - i.e. cars - trucks - planes - buses - motorcycles - submarine -1% of gas actually moves people






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






39. Compression-Tension-Shear






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






41. Static - Dynamic






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






43. ...






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






45. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive






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






47. 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






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






49. Force without machine/Force with machine






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