Question

question 3: fill out this table. (3:17)
material warp (defects) | create a drawing to represent the defect | description of the defect
twist | |
bow | |
cup | |
crook | |
question 4 the man talks about convex and concave. which way should be facing down, against your jointer when your board is being cut? (5:00)
question 5

Explanation:

Step1: Define material - warp defects

Twist: The material is twisted along its length, like a corkscrew. A drawing could show a long - bar shaped material with a spiral pattern indicating the twist.
Bow: The material curves along its length in a convex or concave shape in the plane of its width. A drawing would show a long bar with a gentle curve along its length.
Cup: The material curves in a concave or convex shape across its width. A drawing could depict a rectangular piece of material with a curved surface across the width.
Crook: The material has a side - to - side curve along its length. A drawing would show a long bar curving from side to side.

Step2: Answer Question 4

When cutting a board on a jointer, the concave side should face down against the jointer. This is because the convex side would not make proper contact with the flat surface of the jointer, while the concave side can be flattened out during the cutting process.

Answer:

Material Warp (defects)	Create a drawing to represent the defect	Description of the defect
Bow	A long bar with a gentle length - wise curve	Curved along its length in the plane of its width
Cup	A rectangular piece with a curved surface across the width	Curved across its width
Crook	A long bar curving from side to side	Side - to - side curve along its length
Question 4		The concave side should face down against the jointer.