True/False
Indicate whether the
statement is true or false.
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1.
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Wood is the hard fibrous
substance which makes up the greater part of the stems and branches of tree.
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2.
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Cellulose is the cementing
material that binds the cells together.
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3.
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Cellulose forms the framework
of the cell wall.
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4.
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Color, odor, and resistance to
decay are attributed to cellulose.
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5.
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The wood of tree can be divided
into two major groups - those with pores and those without pores.
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6.
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Hardwood trees have board
leaves.
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7.
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Softwood trees have needlelike
leaves or scale leaves.
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8.
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Softwoods can be identified by
their characteristic “pores”.
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9.
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Wood is the most widely used
construction material.
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10.
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Wood deteriorates through
actions of fungi or by insects.
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11.
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All wood exposed to weather
should be treated.
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12.
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Wood can be commercially
pressure treated against insects and decay organisms.
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13.
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Cold-soaking involves
submerging wood in preservative for two to three days.
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14.
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The double diffusion process
uses coal-tar creosote and other oil preservatives after the wood has soaked in a heated
preservative.
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15.
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Seasoning of wood takes out the
water.
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16.
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Peeling means to remove the
bark.
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17.
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The major reason people use
wood for heat is its convenience.
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18.
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Today about half of the wood
harvested is used for energy.
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19.
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Wood tends to be high in
sulfur.
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20.
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A wood-fueled system has more
total emissions per unit of energy than a coal system.
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21.
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Wood contains about 85%
volatile materials and 1% ash.
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22.
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More energy is derived form dry
wood than from green wood.
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23.
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The moisture content of wood
varies among species.
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Multiple Choice
Identify the choice that
best completes the statement or answers the question.
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24.
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Wood is made up of about___
percent cellulose and 28 percent lignin.
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25.
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_____ is the product used in
manufacture of paper.
a. | Cellulose | b. | Lignin | c. | Cells | d. | Softwood |
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26.
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Which of the following is not
an expression used for the weight of wood?
a. | Weight per cubic
feet | c. | Tonnage per square
inch | b. | Weight per board feet | d. | Specific gravity |
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27.
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Which of the following is not
used to bend wood?
a. | Wax | b. | Heat | c. | Moisture | d. | Chemicals |
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28.
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Which of the following is not a
good preservative?
a. | Coal-tar
creosote | b. | “Penta” solutions | c. | Solutions of creosote and toxic
chemicals | d. | Wax |
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29.
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____ is the weight of the
complete tree to be used for energy.
a. | Volume | b. | Bole | c. | Residue | d. | Biomass |
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30.
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The above ground biomass of a
commercial tree is about ____ percent wood.
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31.
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A ____ is the amount of heat
required to raise the temperature of a pound of water 1 degree.
a. | heat
ratio | b. | BTU | c. | mass | d. | energy unit |
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