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. Combustion of fuel mixture ignited by spark plug






3. What we are studying






4. ...






5. The magnitude of something in a particular direction






6. 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)






7. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force






8. What we are not studying






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






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






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






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






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






14. Dimensions and units






15. Force x Distance






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






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






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






19. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human






20. 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


21. When the sum of all forces and the sum of all moments both equal forces - No movement






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






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






24. 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






25. Compression-Tension-Shear






26. 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 (






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






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






29. 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






30. A pull on an object






31. A combination of components






32. Combustion ignited by spark plug and materials are compressed






33. Applied at an angle or parallel to a surface






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






35. 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






36. Weight/Time






37. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us


38. Force/Area






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






40. Liquid or gas






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






42. 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.






43. Rotation may occur






44. One that pushes on an object






45. 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






46. The branch of science and engineering involving measurement






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






48. Can be applied at a time on an object






49. Piston travels up and both plugs are closed






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