A knot is a particular type of imperfection in a piece of wood; it will affect the technical properties of the wood, usually reducing the local strength and increasing the tendency for splitting along the wood grain, but may be exploited for visual effect. In a longitudinally sawn plank, a knot will appear as a roughly circular "solid" (usually darker) piece of wood around which the grain of the rest of the wood "flows" (parts and rejoins). Within a knot, the direction of the wood (grain direction) is up to 90 degrees different from the grain direction of the regular wood. COUNT 5
QSN1 What is the sort of circular imperfection in a piece of wood called? ANS1 knot QSN2 What property of wood does a knot usually reduce in the wood around it? ANS2 strength QSN3 In what direction is wood often sawn so that a knot appears as a solid circle that the grain flows around? ANS3 longitudinally QSN4 Are knots usually lighter or darker than the surrounding wood? ANS4 darker QSN5 The direction of grain in a knot can differ by as much as how many degrees from the regular wood? ANS5 90