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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. Body at rest or is in equilibrium (wall)






2. Liquid or gas






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






4. 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


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


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






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






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






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






10. Tells us how fast work is done - varies with time (more power is needed to do work in less time - and less power is needed to do work in more time) =Fd/s -Units: USA: ft- lb/s SI: watts (J/S)






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


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






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






14. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us


15. Air is drawn in






16. The designing of machines that contribute to society and our quality of life - Mechanical engineers apply the principles of mathematics - chemistry - and physics to solve real- world problems






17. The magnitude of something in a particular direction






18. What we are not studying






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






20. When the fluid is in motion






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






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






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






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. (Force)(Distance)/Seconds






26. 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






27. Body in motion (car)






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






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






30. 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






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






32. Length x Width






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






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






35. Air is compressed - work is done on the system






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






37. Piston travels up and both plugs are closed






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






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






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






41. (pi) x (radius)^2






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






43. Length / Time






44. Combustion of fuel mixture ignited by spark plug






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






46. Compression of fuel mix






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






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






50. Mass x acceleration






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