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






2. (pi) x (radius)^2






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






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






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






6. 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 (






7. 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






8. When the moving fluid is a gas






9. A combination of components






10. Rotation may occur






11. Force x Distance






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






13. An indication of kinetic energy of mass at the molecular level






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






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






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






17. When the fluid is in motion






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






19. 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






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






21. 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






22. 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






23. If the force needed to operate the machine (input force) is less than the force being opposed or the load being moved (output force) -The ratio of the output force divided by the input force -If the number is greater than one - there is a mechanical






24. Psi - newtons - pascals






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






26. Combustion of fuel mixture ignited by spark plug






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






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. 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






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






32. Exhaust






33. Static - Dynamic






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






35. Compression of fuel mix






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






37. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved






38. Body in motion (car)






39. Length x Width x Height






40. Force/Area






41. What we are studying






42. Intake of fuel and air mix






43. 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






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






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






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






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






49. 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






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