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






2. Combustion of fuel mixture ignited by spark plug






3. A pull on an object






4. A combination of components






5. 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)






6. 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






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






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






9. Describes how applied forces bring a body into motion






10. Compression-Tension-Shear






11. 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






12. What we are studying






13. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2






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






15. 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






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






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






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






19. Exhaust






20. Rotation will not occur - but translation might occur






21. Exhaust of combustion products






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






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






24. Liquid or gas






25. 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






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






27. Applied at an angle or parallel to a surface






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






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






30. Can be applied at a time on an object






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






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






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






34. Dimensions and units






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






36. When the moving fluid is a gas






37. When the fluid is in motion






38. 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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


39. 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






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






41. Static - Dynamic






42. Force/Area






43. 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.






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






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






46. Work/force or vertical distance/sloping distance






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






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






49. 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






50. (pi) x (radius)^2