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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. Can be applied at a time on an object






2. 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






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






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






5. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert






6. When the moving fluid is a gas






7. Compression-Tension-Shear






8. Force x Distance






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






10. Applied at an angle or parallel to a surface






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






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






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






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


16. 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






17. Psi - newtons - pascals






18. When the work done by the effort just equals the work done by the load - ______ of the machine will occur






19. When the fluid is in motion






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






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






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






23. (pi) x (radius)^2






24. Length x Width






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






26. A combination of components






27. Force/Area






28. Combustion ignited by spark plug and materials are compressed






29. When fluid is at rest






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






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






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






33. The branch of science and engineering involving measurement






34. One that pushes on an object






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






36. Exhaust of combustion products






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






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






39. Mass x acceleration






40. Air is drawn in






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






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


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






44. Ignition - power stroke






45. 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






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






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






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






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






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