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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 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






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






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






4. Ignition - power stroke






5. Exhaust of combustion products






6. Compression of fuel mix






7. What we are not studying






8. One that pushes on an object






9. Force without machine/Force with machine






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






11. 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






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






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






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






15. Force/Area






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






17. 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






18. Air is drawn in






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






20. 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 (






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






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






23. Describes a physical property of anything - What we are measuring






24. When the fluid is in motion






25. ...






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






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






28. 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.






29. Force x Distance






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






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






32. 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






33. Exhaust






34. 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






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






36. 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






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






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






39. A pull on an object






40. 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






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






42. Combustion ignited by spark plug and materials are compressed






43. Intake of fuel and air mix






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






45. (Force)(Distance)/Seconds






46. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components






47. Body in motion (car)






48. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller






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






50. Force and mass are proportional to each other (F=ma) -If F increases - so does acceleration -Force causes acceleration - More force means more acceleration - same mass - More mass means less acceleration - same force

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Can you answer 50 questions in 15 minutes?



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