Utilization of Forest Products

A. Which are derived from gymnosperms such as pines, evergreen, needle like leaves seeds in cones
B. Hardwoods are those derived from angiosperms such as oak, ash, popular, with broad leaves seed enclosed bearing flowers
C. Wood responsible for sap conduction is termed as sap wood
D. As the wood increases in diameter, cells to the inside are block. This portion of wood is known as heart wood
E. All of the above

A. Knots
B. Reaction wood or abnormal wood
C. Brashness
D. Grains
E. All of the above

A. Live knots: v Tissues are continuous stem tissues. These are called “Tight-knots”.
B. Dead knots: When branch wood tissues are dead and not in continuation with main stem tissues
C. Both (a) & (b)
D. None of these

A. Compression wood (CW)
B. Tension wood (TW)
C. Both (a) & (b)
D. None of these

A. To Evarts and Mason (106) it is due to gravity
B. Metzger (1908) says it is due to tension and compression
C. Wersking and Baily, due to (1942) increase or decrease in plant hormones
D. Philips says (1940), it is due to wind
E. All of the above

A. To Kochler (1933), due unbalanced growth stresses or forces
B. They may develop as a result of heavy frost
C. Both (a) & (b)
D. None of these

A. Heavy frost
B. Heavy low temperature
C. Both (a) & (b)
D. None of these

A. Frost rings: are dark brownish lines within the growth rings as a result of injury to the cambium due to the heavy frost
B. Frost cracks: to the very much low temperature, the cracks appear at the basal portion of old trees
C. Both (a) & (b)
D. None of these

A. Railway sleepers Cross arms
B. Carriage and wagon work
C. House building beams, floor boards
D. Door and windows frames
E. All of the above

A. Joinery wood
B. Construction
C. Light furniture
D. All of the above