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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. Static - Dynamic






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






3. When the fluid is in motion






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






5. (pi) x (radius)^2






6. The force simple machines use to do work on a single load or against a single force






7. Combustion of fuel mixture ignited by spark plug






8. Applied at an angle or parallel to a surface






9. 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 (






10. Length x Width x Height






11. Length x Width






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






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






14. 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






15. 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






16. Psi - newtons - pascals






17. Rotation may occur






18. 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






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






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






21. 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






22. Body in motion (car)






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






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






25. Exhaust of combustion products






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






27. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human






28. Weight/Time






29. A flat - sloping surface -The only simple machine that does not move -The force is applied to the ramp - since this is the direction the load weight is moved -Sloping side is longer than vertical side -Less force is required to accomplish the same am






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






31. Compression of fuel mix






32. Length / Time






33. What we are not studying






34. A pull on an object






35. Liquid or gas






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






37. When the moving fluid is a gas






38. Force/Area






39. Ignition - power stroke






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






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






42. Describes how applied forces bring a body into motion






43. What we are studying






44. One that pushes on an object






45. Often a free body has _______ acting on it






46. 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)






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






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






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






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