Test your basic knowledge |

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






2. What we are not studying






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






4. Applied at an angle or parallel to a surface






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

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6. Length x Width x Height






7. What we are studying






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






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






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






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






12. 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






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






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






15. 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






16. Compression-Tension-Shear






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






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






19. Combustion of fuel mixture ignited by spark plug






20. 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






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






22. Piston travels up and both plugs are closed






23. 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






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






25. When fluid is at rest






26. A pull on an object






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






28. 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






29. Psi - newtons - pascals






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






31. Body in motion (car)






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






33. Static - Dynamic






34. Rotation will not occur - but translation might occur






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

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






37. Exhaust






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






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






40. 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






41. Intake of fuel and air mix






42. 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)






43. The magnitude of something in a particular direction






44. (Force)(Distance)/Seconds






45. Exhaust of combustion products






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






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






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






49. Liquid or gas






50. Force x Distance