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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. The branch of science and engineering involving measurement






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






3. Length x Width x Height






4. (Force)(Distance)/Seconds






5. Can be applied at a time on an object






6. Air is drawn in






7. 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






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






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. Piston travels up and both plugs are closed






11. One that pushes on an object






12. 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






13. When the moving fluid is a gas






14. Combustion ignited by spark plug and materials are compressed






15. Force without machine/Force with machine






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






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






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






19. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)






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






21. Applied at an angle or parallel to a surface






22. Dimensions and units






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






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






25. What we are studying






26. 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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27. 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






28. Describes how applied forces bring a body into motion






29. 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






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






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






32. 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)






33. Intake of fuel and air mix






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






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






36. Rotation will not occur - but translation might occur






37. Force x Distance






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






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






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






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






42. Exhaust of combustion products






43. Psi - newtons - pascals






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






45. Work/force or vertical distance/sloping distance






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






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






48. ...






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






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