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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. 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 (






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






3. When fluid is at rest






4. Length x Width






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






6. A combination of components






7. The branch of science and engineering involving measurement






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






9. 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






10. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied






11. Force/Area






12. Compression of fuel mix






13. Body in motion (car)






14. Ignition - power stroke






15. 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






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






17. When the fluid is in motion






18. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment






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






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






21. Piston travels down and intake valve is opened. Intake of fuel and air into chamber






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






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






24. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive






25. (Force)(Distance)/Seconds






26. Mass x acceleration






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






28. Rotation may occur






29. Applied at an angle or parallel to a surface






30. Work/force or vertical distance/sloping distance






31. Rotation will not occur - but translation might occur






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






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






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






35. Psi - newtons - pascals






36. (pi) x (radius)^2






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






38. Describes how applied forces bring a body into motion






39. Air is drawn in






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






41. Exhaust of combustion products






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






43. Exhaust






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






45. Force x Distance






46. ...






47. Length / Time






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






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






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