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






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






3. Exhaust of combustion products






4. (pi) x (radius)^2






5. 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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6. Air is compressed - work is done on the system






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






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






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






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






11. 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






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






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






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






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






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






17. Describes how applied forces bring a body into motion






18. Rotation will not occur - but translation might occur






19. Length x Width x Height






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






21. The branch of science and engineering involving measurement






22. 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






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






24. Combustion ignited by spark plug and materials are compressed






25. Psi - newtons - pascals






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






27. Dimensions and units






28. When the fluid is in motion






29. 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






30. Ignition - power stroke






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






32. Used in cars -2 rotations of crankshaft -4 strokes (down - up - down - up) of piston - i.e. cars - trucks - planes - buses - motorcycles - submarine -1% of gas actually moves people






33. 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






34. Length x Width






35. Mass x acceleration






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






37. 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 (






38. Force x Distance






39. Body in motion (car)






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






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






42. Weight/Time






43. Static - Dynamic






44. 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






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






46. Force without machine/Force with machine






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






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






49. Compression of fuel mix






50. Length / Time