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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. 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)






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






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






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






5. A combination of components






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






7. Applied at an angle or parallel to a surface






8. The standard system of units that uses base 10 and used in the rest of the world. US does not use - but Great Britain does - Base Units: mass - kilograms (kg) - length- meters (m) - and time-Seconds (S) - Force is a derived unit measured in newtons (






9. Force x Distance






10. Combustion ignited by spark plug and materials are compressed






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






12. 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






13. Work/force or vertical distance/sloping distance






14. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human






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






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

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17. Piston travels up and both plugs are closed






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






19. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive






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






21. Mass x acceleration






22. Exhaust of combustion products






23. Weight/Time






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






25. The magnitude of something in a particular direction






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

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27. Friction changes KE to heat energy- Heat is transferred to air- Front brakes work harder than rear- Some brakes use asbestos- Newer cars have dual braking systems - Don't drive through water or your brakes won't work well (ride breaks to dry them out






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






29. When fluid is at rest






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






31. Can be applied at a time on an object






32. 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






33. Exhaust






34. Describes how applied forces bring a body into motion






35. When the moving fluid is a gas






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






37. One that pushes on an object






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






39. Psi - newtons - pascals






40. 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






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






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






43. Rotation may occur






44. Intake of fuel and air mix






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






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






47. Body in motion (car)






48. 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






49. 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






50. ...