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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. Body in motion (car)






2. Ignition - power stroke






3. The branch of science and engineering involving measurement






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






5. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion

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






7. Force/Area






8. Air is compressed - work is done on the system






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






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






11. When fluid is at rest






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






13. Exhaust






14. Dimensions and units






15. Intake of fuel and air mixture - compression of mixture by piston






16. 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






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






18. Work/force or vertical distance/sloping distance






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






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






21. 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






22. Applied at an angle or parallel to a surface






23. Often a free body has _______ acting on it






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






25. A combination of components






26. 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






27. When the moving fluid is a gas






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






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






30. What we are studying






31. 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






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






33. Air is drawn in






34. 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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35. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)






36. When the fluid is in motion






37. A quantity that has both magnitude and direction when placed within a coordinate system -Forces and Velocity i.e. driving 50 miles to the northeast






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






39. 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






40. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller






41. Length x Width x Height






42. 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)






43. Psi - newtons - pascals






44. Compression-Tension-Shear






45. Rotation will not occur - but translation might occur






46. Intake of fuel and air mix






47. 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






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






49. 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






50. Liquid or gas