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. Compression-Tension-Shear






2. When the moving fluid is a gas






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






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






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






6. Force x Distance






7. A pull on an object






8. Work/force or vertical distance/sloping distance






9. Two stroke- Four Stroke- Diesel-Rotary -Hybrid






10. Length x Width x Height






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






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






13. Length / Time






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






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






16. Mass x acceleration






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






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






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






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






21. A system adopted from an old British system of units in the 13th century -Engineering system -Units: length- foot (ft) - time- second (s) - force-(lbs) - Mass is a derived unit called a slug -Political/Economic choice -Awkward






22. ...






23. A combination of components






24. Psi - newtons - pascals






25. Static - Dynamic






26. 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






27. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion


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


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






30. 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






31. (Force)(Distance)/Seconds






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






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






35. Exhaust of combustion products






36. Weight/Time






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






38. Ignition - power stroke






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






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






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






42. What we are not studying






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






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






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






46. Piston travels up and both plugs are closed






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






48. Used in cars -2 rotations of crankshaft -4 strokes (down - up - down - up) of piston - i.e. cars - trucks - planes - buses - motorcycles - submarine -1% of gas actually moves people






49. Rotation may occur






50. Compression of fuel mix