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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. Exhaust of combustion products






2. 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






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






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






5. When fluid is at rest






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






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






8. Often a free body has _______ acting on it






9. Length x Width x Height






10. 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






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






12. Force x Distance






13. Ignition - power stroke






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






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. 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






17. 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






18. When the moving fluid is a gas






19. Static - Dynamic






20. Psi - newtons - pascals






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






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






23. Rotation will not occur - but translation might occur






24. When the fluid is in motion






25. Compression-Tension-Shear






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






27. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag






28. 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






29. A combination of components






30. Length / Time






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






32. 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






33. 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






34. (pi) x (radius)^2






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






36. The magnitude of something in a particular direction






37. A pull on an object






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






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






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






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






42. Tells us how fast work is done - varies with time (more power is needed to do work in less time - and less power is needed to do work in more time) =Fd/s -Units: USA: ft- lb/s SI: watts (J/S)






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






44. One that pushes on an object






45. Rotation may occur






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






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






49. Combustion of fuel mixture ignited by spark plug






50. Length x Width