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. Dimensions and units






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






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






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






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






6. Intake of fuel and air mix






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






8. Describes how applied forces bring a body into motion






9. Length / Time






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






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






12. When the fluid is in motion






13. 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






14. Rotation will not occur - but translation might occur






15. The branch of science and engineering involving measurement






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. 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






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






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






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






21. 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






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






23. Static - Dynamic






24. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion

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


25. When fluid is at rest






26. Air is compressed - work is done on the system






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






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






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






30. 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.






31. A^2+b^2=c^2 - used to calculate vectors






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






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






34. 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






35. Often a free body has _______ acting on it






36. Rotation may occur






37. One that pushes on an object






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






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






40. A pull on an object






41. Varies by location (on earth) - distance (from earth) - and mass (of planet)






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






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






44. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width






45. The magnitude of something in a particular direction






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






47. Force/Area






48. Force without machine/Force with machine






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






50. Piston travels up and both plugs are closed