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

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

3.0 feet

Answer

5.0 feet

Answer

6.0 feet

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

Measure tree height using triangulation

Answer

Estimate stand age from core increment borings

Answer

Measure crown diameter from the ground

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

Site index tables

Answer

Silvicultural treatment prescriptions

Answer

Stem taper equations

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

Cross-sectional area at breast height

Answer

Weight of green timber per cubic foot

Answer

Linear feet of a log

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

Total tree height to the tip

Answer

Height to the base of the live crown

Answer

Height at which DBH is measured

Question 6

Which sampling design uses plots placed at regular intervals across a forested area?

Accepted Answer

Systematic sampling

Answer

Simple random sampling

Answer

Stratified random sampling

Answer

Cluster sampling