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






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






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






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






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


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






7. Rotation will not occur - but translation might occur






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






9. Describes how applied forces bring a body into motion






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






11. Work/force or vertical distance/sloping distance






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






13. 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 (






14. Psi - newtons - pascals






15. 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






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






17. 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






18. Length / Time






19. Liquid or gas






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






21. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width






22. 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






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






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






25. Intake of fuel and air mix






26. One that pushes on an object






27. 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






28. What we are studying






29. 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.






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






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






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






33. Compression-Tension-Shear






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






35. A pull on an object






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






37. Rotation may occur






38. Length x Width x Height






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






40. Air is drawn in






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






42. Piston travels up and both plugs are closed






43. Describes how applied forces bring a body into rest or equilibrium






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






45. Mass x acceleration






46. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda






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






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






49. 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


50. Can be applied at a time on an object