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






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






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






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






5. 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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6. Liquid or gas






7. Describes how applied forces bring a body into rest or equilibrium






8. Exhaust of combustion products






9. Body in motion (car)






10. 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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11. 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 (






12. Air is drawn in






13. Length / Time






14. A combination of components






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






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






17. 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






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






19. Often a free body has _______ acting on it






20. Length x Width x Height






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






22. The branch of science and engineering involving measurement






23. When the fluid is in motion






24. The magnitude of something in a particular direction






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






26. Rotation will not occur - but translation might occur






27. When the moving fluid is a gas






28. Can be applied at a time on an object






29. Combustion ignited by spark plug and materials are compressed






30. Describes how applied forces bring a body into motion






31. Applied at an angle or parallel to a surface






32. Work/force or vertical distance/sloping distance






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






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






35. Intake of fuel and air mix






36. Static - Dynamic






37. 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






38. Compression-Tension-Shear






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






40. 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






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






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






43. (pi) x (radius)^2






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






45. Psi - newtons - pascals






46. What we are not studying






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






48. 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






49. 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






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