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






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






3. 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






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






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






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






7. Static - Dynamic






8. When fluid is at rest






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






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






11. Ignition - power stroke






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






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






14. A combination of components






15. Describes how applied forces bring a body into motion






16. What we are studying






17. What we are not studying






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






19. When the moving fluid is a gas






20. Work/force or vertical distance/sloping distance






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






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






23. 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






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






25. Exhaust of combustion products






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






27. 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






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






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






30. Piston travels up and both plugs are closed






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






32. 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






33. Psi - newtons - pascals






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






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






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






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






38. The branch of science and engineering involving measurement






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






40. Force/Area






41. 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






42. 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






43. Combustion ignited by spark plug and materials are compressed






44. Intake of fuel and air mix






45. 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






46. One that pushes on an object






47. Compression-Tension-Shear






48. Combustion of fuel mixture ignited by spark plug






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






50. Compression of fuel mix