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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. 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






2. Length x Width






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






4. When fluid is at rest






5. The magnitude of something in a particular direction






6. 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






7. When the fluid is in motion






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






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






10. 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 (






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






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






13. Work/force or vertical distance/sloping distance






14. (pi) x (radius)^2






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






17. Combustion ignited by spark plug and materials are compressed






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






19. 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






20. Ignition - power stroke






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






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






23. Force without machine/Force with machine






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






25. When the moving fluid is a gas






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






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






28. 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






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

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






31. Describes how applied forces bring a body into rest or equilibrium






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






33. 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






34. Intake of fuel and air mix






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






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






37. Dimensions and units






38. The branch of science and engineering involving measurement






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






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






41. Air is drawn in






42. Liquid or gas






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






44. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert






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






46. Can be applied at a time on an object






47. Applied at an angle or parallel to a surface






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






49. 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






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