mechanical or hydraulic safety logging clamp strapped firmly around the basal trunk of high-value timber trees prior to making the felling notch and back cut.
Primary Purpose: Prevents premature splitting / barbers-chair splintering of the stem caused by bending stresses during tree fall, protecting valuable sawlog timber. (Correct answer: Option 1)
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2
ICAR JRF Forestry 29 Jun 2024Shift 1
MCQ (Single Correct)+4−1
Chromated zinc chloride is superior to zinc chloride as a wood preservative because of its
Plain zinc chloride ($ZnCl_2$) is an effective water-borne fungicide but leaches out rapidly when exposed to rain and soil moisture.
Incorporating hexavalent chromium (sodium dichromate) causes chemical fixation of zinc inside wood cellulose and lignin, providing superior resistance to leaching in outdoor exposures. (Correct answer: Option 4)
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