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. Length / Time






2. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid


3. 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


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






5. The magnitude of something in a particular direction






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






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






8. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S






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






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






11. ...






12. Dimensions and units






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






14. Liquid or gas






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






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






17. 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






18. Length x Width x Height






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






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






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






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






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






24. (pi) x (radius)^2






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






26. Force/Area






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






28. A pull on an object






29. Body in motion (car)






30. If the force needed to operate the machine (input force) is less than the force being opposed or the load being moved (output force) -The ratio of the output force divided by the input force -If the number is greater than one - there is a mechanical






31. Intake of fuel and air mix






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






33. Piston travels up and both plugs are closed






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






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






36. A combination of components






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






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






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






40. Force x Distance






41. When the fluid is in motion






42. Length x Width






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






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






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






46. When fluid is at rest






47. What we are studying






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






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






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