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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. When the work done by the effort exceeds the work done by the load - the load...






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






3. Static - Dynamic






4. Length / Time






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






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






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






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






9. When the fluid is in motion






10. Force without machine/Force with machine






11. Force x Distance






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






14. Dimensions and units






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






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






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






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






19. 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






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






21. Body in motion (car)






22. Describes how applied forces bring a body into motion






23. Movement along a line (reciprocal or linear motion) -Units: feet and meters






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






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






26. 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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27. What we are studying






28. Mass x acceleration






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






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






31. 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






32. A combination of components






33. Compression of fuel mix






34. ...






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






36. What we are not studying






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






38. 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






39. Piston travels up and both plugs are closed






40. Force/Area






41. Rotation may occur






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






43. When the moving fluid is a gas






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






45. Combustion ignited by spark plug and materials are compressed






46. Piston travels down and intake valve is opened. Intake of fuel and air into chamber






47. A quantity that has both magnitude and direction when placed within a coordinate system -Forces and Velocity i.e. driving 50 miles to the northeast






48. The branch of science and engineering involving measurement






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






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







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Can you answer 50 questions in 15 minutes?


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