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






3. Force without machine/Force with machine






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

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






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






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






9. A combination of components






10. Body in motion (car)






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






12. Static - Dynamic






13. 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






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






15. Combustion ignited by spark plug and materials are compressed






16. Exhaust






17. The branch of science and engineering involving measurement






18. Combustion of fuel mixture ignited by spark plug






19. Weight/Time






20. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag






21. What we are not studying






22. 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






23. Intake of fuel and air mix






24. 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






25. One that pushes on an object






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






27. Force x Distance






28. Can be applied at a time on an object






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






30. When the fluid is in motion






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






32. A pull on an object






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






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






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






36. 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






37. (pi) x (radius)^2






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






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






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






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






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






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






46. Work/force or vertical distance/sloping distance






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






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






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






50. Ignition - power stroke