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






2. Length x Width






3. Ignition - power stroke






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






5. Length x Width x Height






6. (Force)(Distance)/Seconds






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






8. 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






9. The designing of machines that contribute to society and our quality of life - Mechanical engineers apply the principles of mathematics - chemistry - and physics to solve real- world problems






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






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






12. Force without machine/Force with machine






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






14. Body in motion (car)






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






16. Force x Distance






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






18. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components






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






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






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






22. The magnitude of something in a particular direction






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






24. 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






25. Combustion of fuel mixture ignited by spark plug






26. Piston travels up and both plugs are closed






27. 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






28. Exhaust






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






30. Result of a force moving an object against a resistance through some distance in a desired direction -Work transfers energy -Work is a measure of what is done and not the effort applied - Done by lifting - pushing - rotating - or sliding -W=Fd -F=Amo






31. (pi) x (radius)^2






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






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






34. Air is drawn in






35. 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






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






37. When the fluid is in motion






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






39. Dimensions and units






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






41. When fluid is at rest






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






43. 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






44. What we are not studying






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






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






47. 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 (






48. 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






49. Mass x acceleration






50. Compression-Tension-Shear