ASA o&p exam guide airframe Dale Crane questions with correct answers

which species of wood is considered to be the standard when comparing other woods for the same use in aircraft structure? CORRECT ANSWER Sitka spruce why must of abrupt changes in cross-sectional area of wooden structural member be avoided? CORRECT ANSWER abrupt changes in the cross-sectional area of a structural member concentrate stresses and can cause failure what is the basic difference between laminated wood and plywood CORRECT ANSWER in laminated wood all of the grain runs in the same direction, and plywood the Grain in the layers cross the others at a 90 or 45 degree angle what effect does moisture have on wood aircraft structure CORRECT ANSWER moisture causes the wood to swell and crack as it dries out. It allows fungus to develop in the wood and cause it to decay can Northern White Pine be used as a substitute for spruce CORRECT ANSWER yes but it must be increased in size to compensate for its lower strength which wood is more inclined to warp, flat grain or vertical grain? CORRECT ANSWER flat grain