Test your basic knowledge |

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






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






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






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






5. The magnitude of something in a particular direction






6. The branch of science and engineering involving measurement






7. Air is drawn in






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






9. Force x Distance






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






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






12. What we are not studying






13. 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






14. Applied at an angle or parallel to a surface






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






16. Combustion of fuel mixture ignited by spark plug






17. Liquid or gas






18. Static - Dynamic






19. Tells us how fast work is done - varies with time (more power is needed to do work in less time - and less power is needed to do work in more time) =Fd/s -Units: USA: ft- lb/s SI: watts (J/S)






20. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid

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






22. (Force)(Distance)/Seconds






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






24. Exhaust of combustion products






25. What we are studying






26. 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






27. 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 (






28. Force/Area






29. 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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30. Psi - newtons - pascals






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






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






33. A pull on an object






34. Rotation may occur






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






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






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






38. 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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39. ...






40. A system adopted from an old British system of units in the 13th century -Engineering system -Units: length- foot (ft) - time- second (s) - force-(lbs) - Mass is a derived unit called a slug -Political/Economic choice -Awkward






41. Can be applied at a time on an object






42. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N






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






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






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






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






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






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






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






50. When the fluid is in motion