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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. Rotation may occur






2. 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






3. Body in motion (car)






4. One that pushes on an object






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






6. Compression of fuel mix






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






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






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






10. Static - Dynamic






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


12. 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






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






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






15. Combustion ignited by spark plug and materials are compressed






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






17. Describes how applied forces bring a body into motion






18. Force x Distance






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






20. Intake of fuel and air mix






21. Often a free body has _______ acting on it






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






23. Length x Width x Height






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






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


26. Combustion of fuel mixture ignited by spark plug






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






28. 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






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






30. When the work done by the effort exceeds the work done by the load - the load...






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






32. 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






33. Can be applied at a time on an object






34. Mass x acceleration






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






36. Length / Time






37. 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)






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






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






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






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






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






43. Piston travels up and both plugs are closed






44. Weight/Time






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






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






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






48. Compression-Tension-Shear






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






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