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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. Psi - newtons - pascals






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






3. Piston travels up and exhaust valve opens. Combustion by product exhaustion






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






5. 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






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






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






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






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






10. 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






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






12. Rotation may occur






13. 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






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






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






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






17. Liquid or gas






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






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






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






21. Mass x acceleration






22. Applied at an angle or parallel to a surface






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






24. Compression-Tension-Shear






25. A combination of components






26. Same pressure - work - volume - Different forces and distances






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






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






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






30. Combustion ignited by spark plug and materials are compressed






31. 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 (






32. Compression of fuel mix






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






34. Rotation will not occur - but translation might occur






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






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






37. Force without machine/Force with machine






38. 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






39. 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






40. Weight/Time






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






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






43. 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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44. Air is compressed - work is done on the system






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






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






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






48. Work/force or vertical distance/sloping distance






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






50. Intake of fuel and air mix







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