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






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






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






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






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






6. The branch of science and engineering involving measurement






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






8. Body in motion (car)






9. Exhaust






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






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






12. Combustion ignited by spark plug and materials are compressed






13. Length / Time






14. A pull on an object






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






16. 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 (






17. Mass x acceleration






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






19. 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






20. Compression of fuel mix






21. The magnitude of something in a particular direction






22. (Force)(Distance)/Seconds






23. Combustion of fuel mixture ignited by spark plug






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






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






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






27. Static - Dynamic






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






29. 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






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






31. 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






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






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






34. 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






35. 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)






36. Applied at an angle or parallel to a surface






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






38. 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






39. Weight/Time






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






41. Dimensions and units






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


43. One that pushes on an object






44. When fluid is at rest






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






46. Often a free body has _______ acting on it






47. Force/Area






48. 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






49. Liquid or gas






50. Rotation may occur