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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. 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






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






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






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






5. 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






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






8. Allows comparison between different measuring systems and units - Necessary to market internationally






9. Applied at an angle or parallel to a surface






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






11. Ignition - power stroke






12. Combustion of fuel mixture ignited by spark plug






13. What we are studying






14. 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






15. The magnitude of something in a particular direction






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






17. Air is drawn in






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

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19. Describes how applied forces bring a body into motion






20. Force/Area






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






22. Piston travels up and both plugs are closed






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






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






25. Rotation may occur






26. Rotation will not occur - but translation might occur






27. 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






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






29. Length x Width






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






31. Mass x acceleration






32. 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






33. A combination of components






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






35. ...






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






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






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






39. 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






40. Force without machine/Force with machine






41. 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






42. Can be applied at a time on an object






43. Often a free body has _______ acting on it






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






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






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






47. 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






48. When fluid is at rest






49. Weight/Time






50. Compression-Tension-Shear