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






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






3. Force x Distance






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






5. Compression-Tension-Shear






6. 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






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






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






9. (pi) x (radius)^2






10. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion

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






12. What we are not studying






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






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






15. A pull on an object






16. 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 (






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






18. Length x Width x Height






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






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






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






22. 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






23. When the fluid is in motion






24. Liquid or gas






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






26. 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






27. Length / Time






28. Compression of fuel mix






29. 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






30. Intake of fuel and air mix






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






32. Static - Dynamic






33. Combustion of fuel mixture ignited by spark plug






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






35. 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






36. Mass can neither by created nor destroyed - only transformed






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






38. Dimensions and units






39. Combustion ignited by spark plug and materials are compressed






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






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






42. Exhaust






43. Describes how applied forces bring a body into motion






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






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






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






47. 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






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






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






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