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^2+b^2=c^2






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






3. Length x Width






4. 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






5. Weight/Time






6. Applied at an angle or parallel to a surface






7. An application of Pascal's Principle (trading distance and force while doing the same amount of work) -Gives a mechanical advantage -The muscles of machines - used to produce very large forces - use a fluid under pressure (gas is low pressure and liq






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






9. Dimensions and units






10. Mass x acceleration






11. What we are studying






12. Length x Width x Height






13. Rotation may occur






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






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






16. Rotation will not occur - but translation might occur






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






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






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






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






22. 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






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






24. 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






25. Air is drawn in






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






27. 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






28. 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






29. One that pushes on an object






30. 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






31. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force






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






33. Exhaust






34. 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






35. Compression of fuel mix






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






37. Often a free body has _______ acting on it






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






39. Exhaust of combustion products






40. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N






41. 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






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






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






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






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






46. What we are not studying






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






48. The magnitude of something in a particular direction






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






50. Body in motion (car)