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. Rotation will not occur - but translation might occur






2. The branch of science and engineering involving measurement






3. (pi) x (radius)^2






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






5. Length / Time






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






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






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






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






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






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






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






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






14. 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 (






15. 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






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






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






18. 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






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






20. 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






21. Can be applied at a time on an object






22. Combustion ignited by spark plug and materials are compressed






23. Ignition - power stroke






24. Intake of fuel and air mix






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






26. Piston travels up and exhaust valve opens. Combustion by product exhaustion






27. Piston travels up and both plugs are closed






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






29. Body in motion (car)






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






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






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






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






35. 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






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






37. What we are not studying






38. Length x Width x Height






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






40. Static - Dynamic






41. (Force)(Distance)/Seconds






42. Dimensions and units






43. When the fluid is in motion






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






45. 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






46. When the moving fluid is a gas






47. Often a free body has _______ acting on it






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






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






50. Liquid or gas