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






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






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






4. 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






5. Describes how applied forces bring a body into motion






6. Combustion ignited by spark plug and materials are compressed






7. Mass x acceleration






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






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






10. A pull on an object






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






12. Body in motion (car)






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






14. 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






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






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






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






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






19. 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.






20. 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






21. Air is drawn in






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






23. Intake of fuel and air mix






24. When the fluid is in motion






25. Length x Width






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






27. 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






28. 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






29. Ignition - power stroke






30. Exhaust






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






32. Force x Distance






33. Describes how applied forces bring a body into rest or equilibrium






34. Work/force or vertical distance/sloping distance






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






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






37. Three- dimensional property measured in units of length times length times length =length x width x height






38. Dimensions and units






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






40. Exhaust of combustion products






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






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






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






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






45. Force without machine/Force with machine






46. 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






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






48. Applied at an angle or parallel to a surface






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






50. Liquid or gas