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Hluk a vibrace u motorových pil za vybraných podmínek
 Rak, Jakub
The Bachelor thesis deals with the influence of the quality of used oils and petrols on the vibration and noise level of chainsaws. In the theoretical part, the problematics of noise and vibrations are analyzed together with how they affect the human organism, recommended hearing and vibration personal protective equipment and procedures to reduce the exposure time when operating the chainsaw. Further more the work of the two-stroke engine and composition of fuel mixes is discussed. The practical part describes the measuring equipment, fuel mixtures and the measurement procedure. Verifying whether the quality of petrols and oils which has been used has any effect on the quiet running of the engines and reducing their noise. Followed by the measurement data, it‘s analysis and comments on the results provided in the tables and graphs. Firstly, statistically significant results are included and statistically insignificant results are given in the attachment. In the discussion I deal with the measurement itself, where and how the tolerances in the measurements of the petrol mixtures can appear and the reflection whether is worthy to save money on the quality of the fuel mixtures.
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See also: similar author names
7 Rak, Jan
3 Rak, Jindřich
1 Rak, Josef
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