B.S.F. or B.Sc.F. Bachelor of Science in Forestry Forest Mensuration and Timber Inventory 1

Question 1

Diameter at breast height (DBH) in the United States is measured at what height above the ground?

Accepted Answer

4.5 feet

Answer

US standard specifies DBH is measured at 4.5 feet (1.37 m) above the uphill side of the tree.

Question 2

A Bitterlich angle gauge (wedge prism) in forestry is used to:

Accepted Answer

Conduct variable-radius plot sampling based on tree basal area

Answer

The wedge prism uses the angle-count (Bitterlich) method to sample trees proportional to their basal area, making it efficient for estimating basal area per acre.

Question 3

The International 1/4-inch log rule, Scribner rule, and Doyle rule are all examples of:

Accepted Answer

Log volume estimation methods

Answer

These are standard log rules used in the US to estimate the board-foot volume of sawlogs based on log diameter and length.

Question 4

What does 'board foot' measure in timber commerce?

Accepted Answer

A unit of wood volume equal to 12 inches × 12 inches × 1 inch

Answer

A board foot is a unit of wood volume equal to 144 cubic inches (12″ × 12″ × 1″), the standard unit for measuring and pricing sawn lumber and sawlogs in the US.

Question 5

In forest mensuration, 'merchantable height' of a tree refers to:

Accepted Answer

Height to the point where the stem no longer meets minimum size or quality standards for commercial use

Answer

Merchantable height is the length of stem usable for commercial products, ending where the stem becomes too small in diameter or too defective for the intended product.

B.S.F. or B.Sc.F. Bachelor of Science in Forestry Practice Test

B.S.F. or B.Sc.F. Bachelor of Science in Forestry Practice Test

B.S.F. or B.Sc.F. Bachelor of Science in Forestry Forest Mensuration and Timber Inventory 1