Which of the following is a softwood?
Answer(s): C
Softwood comes from conifers, or trees with needles, usually called evergreens. Such trees are the pines, firs, and spruces.
To prevent rapid drying, freshly cut logs are often __________.
Sometimes logs are not cut into lumber immediately and must be kept from checking and splitting. This can be done by keeping them wet. At the sawmill the logs are kept floating in a pond until they are about ready to be used. This way they do not dry out too quickly and check or split.
A bumping hammer is used to smooth out dents by a(n) __________.
Answer(s): B
A collision auto repair worker uses a bumper hammer to take out some of the dents in a car's sheet metal. This hammer is ideally suited for the job.
A groover is used to __________.
Answer(s): A
A groover is designed to cause the seams to become flattened and make a watertight seal.
Sheet metal is formed into round cylinders by using a __________.
A squaring shear is used to cut sheet metal along a straight line. A bar folder is used to bend sheet metal, and a punch press makes holes in sheet metal. The slip roll is used to form the metal into round, cylindrical shapes.
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