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Mechanical Engineering
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Mechanical Engineering
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25 Questions

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

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

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

4. Liquid or gas

5. What we are studying

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

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

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

9. 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.

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

11. 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

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

13. Result of a force moving an object against a resistance through some distance in a desired direction -Work transfers energy -Work is a measure of what is done and not the effort applied - Done by lifting - pushing - rotating - or sliding -W=Fd -F=Amo

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

15. Compression of fuel mix

16. Exhaust

17. 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

18. Combustion of fuel mixture ignited by spark plug

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

20. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components

21. 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

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. ...

24. 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

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

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