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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. A combination of components






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. 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)






4. ...






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






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






7. What we are studying






8. Static - Dynamic






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






10. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force






11. What we are not studying






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






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






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






15. Weight/Time






16. Pistons connected to crankshaft -1 stroke up - 1 stroke down of the piston -1 rotation of the piston -Problems: high emissions - noisy - inefficient - high vibrations - unburnt fuel - burnt oil -Benefits: small and light -Being phased out in USA - i.






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






18. Force/Area






19. Psi - newtons - pascals






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






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






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






23. Exhaust






24. 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






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






26. Length x Width x Height






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






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






29. Rotation may occur






30. Compression-Tension-Shear






31. The branch of science and engineering involving measurement






32. Mass x acceleration






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






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






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






36. (Force)(Distance)/Seconds






37. Combustion of fuel mixture ignited by spark plug






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






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






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






42. 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






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






44. Combustion ignited by spark plug and materials are compressed






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






46. (pi) x (radius)^2






47. Body in motion (car)






48. 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






49. Work/force or vertical distance/sloping distance






50. Length x Width






Can you answer 50 questions in 15 minutes?



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