ENSAIO DE OPACIDADE E NÍVEL DE RUÍDO DE UM TRATOR AGRÍCOLA

摘要: The objective of this study was to evaluate the smoke opacity and noise level a tractor in function time operation. conducted using without cab. We used completely randomized design with seven testing times fi ve replicates for temperature engine oil. For factorial used, composed two sampling positions (at location operator at exhaust) idle maximum speeds. values varied according testing, showing higher after 12 hours. were below limit established by Brazilian standards 2.5 m-1. Environments lower temperatures humidity resulted values. Noise infl uenced exhaust than that operator. levels above limits standard eight hours work hearing protection.