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. Body in motion (car)






2. 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






3. 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.






4. 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






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






6. Combustion ignited by spark plug and materials are compressed






7. The branch of science and engineering involving measurement






8. What we are studying






9. A combination of components






10. 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 (






11. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag






12. 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






13. Ignition - power stroke






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






15. Applied at an angle or parallel to a surface






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






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






18. Describes how applied forces bring a body into motion






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






20. 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






21. What we are not studying






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






23. Static - Dynamic






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






25. (pi) x (radius)^2






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






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






28. Compression of fuel mix






29. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved






30. Allows comparison between different measuring systems and units - Necessary to market internationally






31. Length / Time






32. 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






33. Dimensions and units






34. Compression-Tension-Shear






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






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






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






38. One that pushes on an object






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






40. 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






41. When the fluid is in motion






42. Intake of fuel and air mix






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






44. When fluid is at rest






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






46. Exhaust






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






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






49. External Combustion engine -Only used in factories and plants (not used in cars)






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