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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. Force x Distance






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






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






4. 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






5. Often a free body has _______ acting on it






6. A pull on an object






7. 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






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






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






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






11. Weight/Time






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






13. 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)






14. When fluid is at rest






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






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






17. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us


18. Combustion of fuel mixture ignited by spark plug






19. A combination of components






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






21. 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






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






23. Psi - newtons - pascals






24. Length / Time






25. Dimensions and units






26. What we are studying






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


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






29. Exhaust of combustion products






30. The magnitude of something in a particular direction






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






32. When the work done by the effort just equals the work done by the load - ______ of the machine will occur






33. One that pushes on an object






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






35. When the sum of all forces and the sum of all moments both equal forces - No movement






36. Length x Width x Height






37. Intake of fuel and air mix






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






39. Force without machine/Force with machine






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






41. When the moving fluid is a gas






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






43. Force/Area






44. 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






45. Exhaust






46. (Force)(Distance)/Seconds






47. 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


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






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






50. Applied at an angle or parallel to a surface