31) Which one of the following is not a preservative of stone
(a) coal tar
(b) paraffin
(c) linseed oil
(d) ASCU
32) Which of the following trees yields hard wood ?
a) deodar
b) chir
c) sheesham
d) pine
33) Siliceous sand subjected to metamorphic action is known as
(a) laterite
(b) murram
(c) quartzite
(d) dolomite
34) The practical limit of moisture content achieved in air drying of timber is
a) 5%
b) 15%
c) 25%
d) 35%
35) Sedimentary rocks are formed due to
(a) solidification of molten mass
(b) gradual deposition of materials like sand, clay, generally by setting water
(c) alteration of original stones under heat and pressure
(d) none of the above
36) According to the relevant IS code, the weight of the timber is to be reckoned at a moisture content of
a) zero
b) 4%
c) 8%
d) 12%
37) The rocks formed due to solidification of molte n mas.s are called
(a) aqueous rocks
(b) sedimentary rocks
(c) metamorphic rocks
(d) igneous rocks
Best Of Luck!!