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. Mass can neither by created nor destroyed - only transformed






2. 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






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






4. Intake of fuel and air mix






5. Mass x acceleration






6. A pull on an object






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






8. Ignition - power stroke






9. Static - Dynamic






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






11. Liquid or gas






12. Often a free body has _______ acting on it






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






14. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us


15. Rotation may occur






16. A combination of components






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






18. Combustion of fuel mixture ignited by spark plug






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






20. (pi) x (radius)^2






21. Length x Width






22. Work/force or vertical distance/sloping distance






23. 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






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






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






26. 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






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






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






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






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






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






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






33. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous






34. The magnitude of something in a particular direction






35. Dimensions and units






36. Length x Width x Height






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






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






39. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute






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






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. What we are studying






43. 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






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






45. Length / Time






46. 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


47. Air is drawn in






48. Piston travels up and both plugs are closed






49. 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






50. When the moving fluid is a gas