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. Static - Dynamic






2. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute






3. What we are not studying






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






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






6. 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






7. A pull on an object






8. Force x Distance






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






10. The magnitude of something in a particular direction






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






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






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






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






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






16. 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)






17. External Combustion engine -Only used in factories and plants (not used in cars)






18. When the moving fluid is a gas






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






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






21. 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






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






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






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






25. The branch of science and engineering involving measurement






26. Rotation may occur






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






28. Compression-Tension-Shear






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






30. 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






31. Mass x acceleration






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






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






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






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






36. Exhaust






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






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






39. 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






40. Length x Width x Height






41. (Force)(Distance)/Seconds






42. What we are studying






43. Intake of fuel and air mix






44. Ignition - power stroke






45. Psi - newtons - pascals






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


47. Body in motion (car)






48. Length x Width






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






50. Force without machine/Force with machine