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






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






3. A pull on an object






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






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






6. When the moving fluid is a gas






7. (Force)(Distance)/Seconds






8. 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






9. A combination of components






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






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






12. 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






13. Work/force or vertical distance/sloping distance






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






15. Static - Dynamic






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






17. Combustion ignited by spark plug and materials are compressed






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






19. 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






20. Force/Area






21. 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






22. Exhaust of combustion products






23. What we are not studying






24. Psi - newtons - pascals






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






26. 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






27. Length / Time






28. When fluid is at rest






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






30. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert






31. Length x Width






32. 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 (






33. Body in motion (car)






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






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






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






37. Dimensions and units






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






39. Compression of fuel mix






40. Exhaust






41. 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






42. The magnitude of something in a particular direction






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






44. (pi) x (radius)^2






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






46. Length x Width x Height






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






48. Rotation may occur






49. The branch of science and engineering involving measurement






50. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human