NPTEL Forests and Their Management Week 4 Assignment Answers 2025
1. For absolute form factor, the reference for the base of the cylinder is
- base of the tree
- breast height
- 10% of tree height
- 20% of tree height
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2. For normal form factor, the reference for the base of the cylinder is
- a.base of the tree
- breast height
- 10% of tree height
- 20% of tree height
Answer :-
3. In India, the breast height is considered to be
- 1.37 m
- 1.47 m
- 1.57 m
- 2.47 m
Answer :-
4. Measurement of height based on similar triangles comes under:
- similar measurement
- dissimilar measurement
- direct measurement
- indirect measurement
Answer :-
5. For a tree with dbh = 45.6 cm, height = 27 m and total stem volume of 1.78 cum, the artificial form factor for the tree is:
- 0.1
- 0.2
- 0.3
- 0.4
Answer :-
6. Consider a stand of eucalyptus trees that are on average 30 cm in diameter and spaced on a regular 3 m grid. Find the spacing factor.
- 5
- 10
- 15
- data insufficient
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7. Diameter over bark (dob), diameter under bark (dub) and bark thickness (tb) are related as:
- dob = dub + tb
- dob = dub – tb
- dob = dub + 2 × tb
- dob = dub – 2 × tb
Answer :-
8. For false form factor, the reference for the base of the cylinder is
- base of the tree
- breast height
- 10% of tree height
- 20% of tree height
Answer :-
9. Choose the correct statement:
- For a non-circular cross-section, girth tape over-estimates the sectional area.
- For a non-circular cross-section, girth tape under-estimates the sectional area.
- For a non-circular cross-section, girth tape correctly estimates the sectional area.
- None of these is a correct statement.
Answer :-
10. A tree has dbh of 25 cm. Find its basal area in sq m.
- .049
- .096
- .149
- .195
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