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. What we are not studying






2. Ignition - power stroke






3. Can be applied at a time on an object






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






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

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






7. The magnitude of something in a particular direction






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






9. (pi) x (radius)^2






10. Rotation may occur






11. 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






12. Mass x acceleration






13. Compression of fuel mix






14. 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






15. Often a free body has _______ acting on it






16. What we are studying






17. When the fluid is in motion






18. Liquid or gas






19. 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






20. 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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21. Exhaust






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






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






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






26. Piston travels up and both plugs are closed






27. Dimensions and units






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






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






30. Combustion of fuel mixture ignited by spark plug






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






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






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






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






35. A combination of components






36. Length x Width






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






38. One that pushes on an object






39. When fluid is at rest






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






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






42. Force/Area






43. Compression-Tension-Shear






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. 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






46. Length / Time






47. 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






48. 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






49. Force x Distance






50. 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)