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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. Often a free body has _______ acting on it






2. Compression-Tension-Shear






3. Can be applied at a time on an object






4. Liquid or gas






5. Force without machine/Force with machine






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






7. Mass x acceleration






8. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force






9. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)






10. ...






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






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






13. 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






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






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






16. Result of a force moving an object against a resistance through some distance in a desired direction -Work transfers energy -Work is a measure of what is done and not the effort applied - Done by lifting - pushing - rotating - or sliding -W=Fd -F=Amo






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






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






19. 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






20. Combustion ignited by spark plug and materials are compressed






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






22. 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






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






24. 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






25. A pull on an object






26. Piston travels up and both plugs are closed






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






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






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


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






31. Rotation may occur






32. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline






33. (Force)(Distance)/Seconds






34. Force x Distance






35. Length x Width x Height






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






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






38. What we are not studying






39. 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






40. Ignition - power stroke






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






42. Body in motion (car)






43. 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






44. The branch of science and engineering involving measurement






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






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






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






48. 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






49. (pi) x (radius)^2






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