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. Intake of fuel and air mix






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






3. 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






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






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






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






8. What we are studying






9. 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






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






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






12. 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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13. Two stroke- Four Stroke- Diesel-Rotary -Hybrid






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






15. 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)






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






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






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






19. The branch of science and engineering involving measurement






20. Dimensions and units






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






22. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller






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






24. 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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25. 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






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






27. Exhaust






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






29. When the fluid is in motion






30. Length x Width






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






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






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






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






35. Combustion ignited by spark plug and materials are compressed






36. (pi) x (radius)^2






37. Length / Time






38. Liquid or gas






39. ...






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






41. Body in motion (car)






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






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






44. 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






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






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






47. 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






48. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda






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






50. 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