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






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






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






4. Dimensions and units






5. The branch of science and engineering involving measurement






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






7. Force x Distance






8. 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






9. Length x Width x Height






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






11. Rotation will not occur - but translation might occur






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






13. Can be applied at a time on an object






14. Ignition - power stroke






15. 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






16. Exhaust of combustion products






17. 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






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






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






20. Compression of fuel mix






21. A pull on an object






22. Weight/Time






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






24. Exhaust






25. 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)






26. A combination of components






27. Intake of fuel and air mix






28. Force/Area






29. When the moving fluid is a gas






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






31. 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






32. Air is drawn in






33. Combine two or more power sources - locomotives - buses (diesel- electric) -Submarines (Nuclear- electric) -Components:gas engine - fuel tank - electric motor - generator - batteries - transmission -2 motors: Internal Combustion Engine and Electric E






34. One that pushes on an object






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






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






37. Describes how applied forces bring a body into motion






38. Friction changes KE to heat energy- Heat is transferred to air- Front brakes work harder than rear- Some brakes use asbestos- Newer cars have dual braking systems - Don't drive through water or your brakes won't work well (ride breaks to dry them out






39. Length x Width






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






41. Static - Dynamic






42. Piston travels up and both plugs are closed






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






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






45. (Force)(Distance)/Seconds






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






47. Result of a force moving an object against a resistance through some distance in a desired direction -Work transfers energy -Work is a measure of what is done and not the effort applied - Done by lifting - pushing - rotating - or sliding -W=Fd -F=Amo






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






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






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







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Can you answer 50 questions in 15 minutes?


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