## NPTEL Forests and their Management Week 4 Assignment Answers 2024

1. measurement of height based on similar triangles comes under

- similar measurement
- dissimilar measurement
- direct measurement
- indirect measurement

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2. for normal form factor, the reference of the base of the cylinder is

- base of the tree
- breast height
- 10% of tree height
- 20% of tree height

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3. in a triangle, the angle between base and hypotenuse, theta= 60 degree and the hypotenuse c = 2cm. find the length of the base b

- 0.33
- 0.5
- 0.75
- 1

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4. 3 trees are located is a sample plot of 15m X 15m. their dbh are as under:

dbh= 25cm, 30cm, 35cm

find the stand basal area in sq m per Ha

- 9.6
- 14.6
- 21.6
- 27.6

Answer :-

5. consider a stand of eucalyptus, trees that are on average 30cm in diameter and spaced on a regular 3m grid. find the spacing factor

- 5
- 10
- 15
- data insufficient

Answer :-

6. for a tree with dbh= 45.6cm, height= 27m and total stem volume of 1.78cum, the artificial form factor of the tree is:

- 0.1
- 0.2
- 0.3
- 0.4

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7. for the absolute form factor, the reference for the base of the cylinder is

- base of the tree
- breast height
- 10% of the height
- 20% of the height

Answer :-

8. diameter over bark (dob), diameter under bark (dub) and the bark thickness (tb) are related as

- dob = dub + tb
- dob = dub – tb
- dob = dub + 2 X tb
- dob = dub -2 X tb

Answer :-

9. choose the correct statement

- for a non-circular section, girth tape over- estimates the sectional area
- for a non-circular section, girth tape under- estimates the sectional area
- for a non-circular section, girth tape correctly- estimates the sectional area
- none of these is a correct statement

Answer :-

10. a tree has dbh of 25cm. find the basal area in sq m

- .049
- .096
- .149
- .195

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