Test your basic knowledge |

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






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






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






4. Static - Dynamic






5. Body in motion (car)






6. A^2+b^2=c^2 - used to calculate vectors






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






8. Liquid or gas






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






10. Often a free body has _______ acting on it






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

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






13. Rotation may occur






14. Intake of fuel and air mix






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






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






17. 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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18. 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






19. Piston travels up and both plugs are closed






20. What we are not studying






21. 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.






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






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






24. A pull on an object






25. The branch of science and engineering involving measurement






26. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag






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






28. What we are studying






29. 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)






30. One that pushes on an object






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






32. 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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33. Combustion of fuel mixture ignited by spark plug






34. Force/Area






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






36. Exhaust






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






38. 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 (






39. Applied at an angle or parallel to a surface






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






41. Fuel is injected and combusts due to temperature of compressed air






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






43. 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






44. Can be applied at a time on an object






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






46. Compression of fuel mix






47. Force without machine/Force with machine






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






49. When the work done by the effort exceeds the work done by the load - the load...






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