A. is used as water proofing material
B. is used as damp proofing material
C. is made from bitumen and hessian fibres
D. All the above
A. Five times their original dimensions
B. Seven times their original dimensions
C. Ten times their original dimensions
D. Three times their original dimensions
A. (3) quartzite
B. both (1) and (3)
C. (2) shale and (3) quartzite
D. all (1), (2) and (3)
A. parallel to grains
B. 45° to grains
C. perpendicular to grains
D. same in all directions
A. lack of ventilation
B. alternate wet and dry conditions
C. complete submergence in water
D. none of the above
A. Heart shakes
B. Cupshakes
C. Starshakes
D. Rindgalls
A. Deodar and shishum
B. Chir and sal
C. sal and teak
D. Chir and deodar
A. Innermost annular rings around the pith
B. Portion of timber between heartwood and cambium layer
C. Thin layers below the bark
D. Thin fibre which extends from the pith outwards and holds the annular rings together