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. One that pushes on an object






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






3. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid

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4. Rotation will not occur - but translation might occur






5. Length x Width x Height






6. (pi) x (radius)^2






7. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)






8. A pull on an object






9. (Force)(Distance)/Seconds






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






11. Weight/Time






12. The magnitude of something in a particular direction






13. When fluid is at rest






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






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






16. 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






17. Combine two or more power sources - locomotives - buses (diesel- electric) -Submarines (Nuclear- electric) -Components:gas engine - fuel tank - electric motor - generator - batteries - transmission -2 motors: Internal Combustion Engine and Electric E






18. 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 (






19. 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






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






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






22. Intake of fuel and air mix






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






24. Liquid or gas






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






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






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






28. 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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29. What we are studying






30. Psi - newtons - pascals






31. A combination of components






32. Air is drawn in






33. Force/Area






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






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






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






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






38. What we are not studying






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

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40. 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






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






42. 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.






43. Compression-Tension-Shear






44. Exhaust






45. Applied at an angle or parallel to a surface






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






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






48. Dimensions and units






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






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