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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. 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. Applied at an angle or parallel to a surface






3. Two stroke- Four Stroke- Diesel-Rotary -Hybrid






4. 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






5. Liquid or gas






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






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






8. When fluid is at rest






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






10. 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






11. Intake of fuel and air mix






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






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






14. When the fluid is in motion






15. 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






16. The branch of science and engineering involving measurement






17. Compression-Tension-Shear






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






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






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






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






22. (pi) x (radius)^2






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






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






25. (Force)(Distance)/Seconds






26. Combustion of fuel mixture ignited by spark plug






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






28. Psi - newtons - pascals






29. Work/force or vertical distance/sloping distance






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






31. 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






32. 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






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






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






35. A combination of components






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






37. 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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38. ...






39. Piston travels up and both plugs are closed






40. Air is drawn in






41. Rotation may occur






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






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






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






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






46. Often a free body has _______ acting on it






47. 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.






48. Combustion ignited by spark plug and materials are compressed






49. Force x Distance






50. Describes how applied forces bring a body into motion






Can you answer 50 questions in 15 minutes?



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