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11.

Thinning methods are:

A.	Mechanical	B.	Selective
C.	Schedule/statistical	D.	All of the above

12.

Thinning classification is / are:

A.	Dominant trees (D)	B.	Dominated (d)
C.	Suppressed (s)	D.	Deed, Moribund (m) and include bent ever and badly leaning trees
E.	All of the above

13.

The major types of thinning are:

14.

Advantage of Heck's correction: Selected trees will have:

A.	Faster rate of growth	B.	Rotation will be shorter
C.	Both (a) & (b)	D.	None of these

15.

Thinning in mixed plantations are:

A.	It is hardly impossible that mixed plant have same height	B.	Ordinary thinning is not applied as it deprives of slow growing spp.
C.	Both (a) & (b)	D.	None of these

16.

Species & site quality affect interval of thinning in way:

A.	Species	B.	Site quality (S.Q)
C.	Both (a) & (b)	D.	None of these

17.

Factor affection thinning is/are:

A.	Site quality (S.Q) : For good SQ thinning will be heavy but for poor S.Q. It will be of lighter intensity	B.	For hot, dry, weedy site, southern aspect thinning will be of lighter intensity.
C.	Objective: For getting timber, heavily thinnings carried out and for getting fuel wood, no need or light, thinning is done	D.	All of the above

18.

The major types of thinning in mixed plantation are:

A.	Selection	B.	Trees to be felled
C.	Improvement felling	D.	All of the above

19.

In different working plans different rules are prescribed. Champion, Seth and Khattak has prescribed rules are:

A.	Felling of saleable dead trees	B.	Thinning where crowed trees are present
C.	Climber cuttings	D.	Climber affected trees
E.	All of the above

20.

Girdling means:

A.	Removal of ring of bark to kill	B.	While species, of thick bark, fluted, stem, sylem remains present inside
C.	Both (a) & (b)	D.	None of these