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






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






3. Rotation will not occur - but translation might occur






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






5. A combination of components






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






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






8. 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






9. Length x Width x Height






10. 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






11. One that pushes on an object






12. Compression of fuel mix






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. (pi) x (radius)^2






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






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

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17. When the work done by the effort exceeds the work done by the load - the load...






18. 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






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






20. Length x Width






21. Intake of fuel and air mix






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






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






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






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






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






27. Describes a physical property of anything - What we are measuring






28. What we are not studying






29. Liquid or gas






30. Pistons connected to crankshaft -1 stroke up - 1 stroke down of the piston -1 rotation of the piston -Problems: high emissions - noisy - inefficient - high vibrations - unburnt fuel - burnt oil -Benefits: small and light -Being phased out in USA - i.






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






32. Combustion ignited by spark plug and materials are compressed






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






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






35. 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






36. Rotation may occur






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






38. Compression-Tension-Shear






39. Air is drawn in






40. When fluid is at rest






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






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






43. 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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44. Can be applied at a time on an object






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






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






48. 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






49. (Force)(Distance)/Seconds






50. The branch of science and engineering involving measurement