106. Due to attack of dry rot, the timber
C. reduces to powder
D. none of these.
107. Teak wood is suitable for
A. sports articles
C. railway sleepers
D. all the above.
108. Seasoning of timber is done for
A. increasing moisture content
B. decreasing moisture content
C. increasing strength of timber
D. none to these.
109. Veneering means
A. carving out designs on timber planks
B. chemically treating timber planks
C. thick layer of superior wood glued to inferior wood
D. thin layer of superior wood glued to inferior wood.
110. According to IS 399-1963, the weight of the timber is specified at
A. 8% moisture content
B. 10% moisture content
C. 12% moisture content
D. 14% moisture content.
111. Knots in timber are
A. defects caused by crushing fibres
B. splits radiating from the centre
C. speckled strains
D. signs of branches cut off.
112. Seasoning is
A. a process of removing sap
C. painting with sodium silicate
D. coating with tar.
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