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. Exhaust






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






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






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






5. Ignition - power stroke






6. (Force)(Distance)/Seconds






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






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






9. Length x Width






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






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






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






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






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






15. 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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






17. 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






18. 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






19. Length x Width x Height






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






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






22. What we are studying






23. Body in motion (car)






24. Mass x acceleration






25. 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)






26. Liquid or gas






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






28. Combustion of fuel mixture ignited by spark plug






29. What we are not studying






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






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






32. (pi) x (radius)^2






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






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






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






36. Often a free body has _______ acting on it






37. More compact (size of beer keg) - No valves -Benefits: fewer parts - lower engine weight Problems: seal - lower inertia forces -1 rotar=3 to 4 pistons






38. Work/force or vertical distance/sloping distance






39. Exhaust of combustion products






40. 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






41. Can be applied at a time on an object






42. Weight/Time






43. 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






44. The magnitude of something in a particular direction






45. A pull on an object






46. 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






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






48. 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






49. Air is drawn in






50. Static - Dynamic