(A) 4% to 6%
(B) 10% to 12%
(C) 15% to 20%
(D) 100%

(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) to impart plasticity
(B) to make the brick durable
(C) to prevent shrinkage
(D) to make the brick impermeable

(A) less than one year
(B) 1 to 5 years
(C) 5 to 10 years
(D) more than 10 years

(A) has good strength along the panel only
(B) can be spilt in the plane of the panel
(C) has greater impact resistance to blows than ordinary wood
(D) cannot be bent more easily than ordinary wood of same thickness

(A) greater tensile strength in longer direction
(B) greater tensile strength in shorter direction
(C) same tensile strength in all directions
(D) none of the above

(A) cambium layer
(B) annular rings
(C) medullary rays
(D) heart wood

(A) 5%
(B) 15%
(C) 25%
(D) 35%

(A) log
(B) batten
(C) plank
(D) baulk