Total No. of Printed Pages : 6 Roll No...
fr-10
wood science and technology
dk"B foKku ,oa izkS|ksfxdh
Bachelor of Science (BSC.-12/16/17) Third Year, Examination, 2020
Time Allowed : 2 Hours Maximum Marks : 40 note: This paper is of Forty (40) marks divided
into Two (02) sections A and B. Attempt the question contained in these sections according to the detailed instructions given therein.
uksV% ;g iz'u i=k pkyhl (40) vadksa dk gSA tks nks (02) [k.Mksa d rFkk [k esa foHkkftr gSA izR;sd [k.M esa fn, x, foLr`r funsZ'kksa ds vuqlkj gh iz'uksa dks gy dhft,A
section-a/
[k.M&^d*
(Long Answer Type Questions/
nh?kZ mÙkjh; iz'u)
Note: Section-'A' contains Five (05) Long answer type questions of Ten (10) marks each.
Learners are required to answer any two (02)
questions only. (2×10=20)
uksV % [k.M&^d* esa ik¡p (05) nh?kZ mÙkjh; iz'u fn, x, gSa] izR;sd iz'u ds fy, nl (10) vad fu/kZfjr gSaA f'k{kkfFkZ;ksa dks buesa ls dsoy nks (02) iz'uksa ds mÙkj nsus gSaA
1. Explain the properties of good wood preservatives.
vPNs dk"B laj{k.k ds xq.kksa dk o.kZu dhft,A
2. What are general principles of seasoning?
Describe about kiln seasoning and solar kiln seasoning.
izdk"B la'kks"k.k ds lkekU; fl¼kUr D;k gSa\ HkV~Bk la'kks"k.k rFkk lw;Z HkV~Bk la'kks"k.k o.kZu dhft,A
3. Explain different kinds of saws. Discuss the working and maintenance of frame saw.
fofHkUu izdkj ds vkjh dks le>kb,A vkjh ds dk;ks± o
j[k&j[kko ij ppkZ dhft,A
4. Enumerate the mechanical properties of wood and describe about the hardness and flexibility.
dk"B ds lU/kjh xq.kksa dks fyf[k, ,oa dBksjrk ,oa yphysiu dk o.kZu dhft,A
5. What do you understand by chemical properties of wood? Discuss various chemical properties of wood in detail.
dk"B ds jklk;fud xq.kksa ls vki D;k le>rs gSa\
dk"B ds fofHkUu jklk;fud xq.kksa dk foLrkjiwoZd o.kZu dhft,A
section-B/
[k.M&[k
(Short answer type questions/
y?kq mÙkjh; iz'u)
Note: Section-B Contains Eight (08) Short answer type questions of Five (05) marks each. Learners are required to answer any four (04) questions
only. (4×5=20)
uksV% [k.M&^[k* esa vkB (08) y?kq mÙkjh; iz'u fn, x, gSa] izR;sd iz'u ds fy, ik¡p (05) vad fu/kZfjr gSaA f'k{kkfFkZ;ksa dks buesa ls dsoy pkj (04) iz'uksa ds mÙkj nsus gSaA
1. Describe in detail the factors which affect durability of timber.
dk"B dks vf/d le; rd lqjf{kr j[kus esa izHkkfor djus okys dkjdksa dk foLr`r o.kZu dhft,A
2. Explain the wood on the basis of its gross physical feature and mechanical properties.
HkkSfrd ,oa ;kfU=kd xq.koRrk ds vk/kj ij dk"B dk o.kZu dhft,A
3. Describe different wood working tools used in carpentry operation along with their importance.
dkjisUVªh ds lkeku okys fofHkUu ydM+h ds vkStkjksa dh
fo'ks"krkvksa dk o.kZu dhft,A
4. Write a short note on bamboo and cane.
cSEcw ,oa dsu ij laf{kIr esa fVIi.kh fyf[k,A
5. Write short notes of the following with examples:
fuEufyf[kr ij mnkgj.k lfgr laf{kIr fVIif.k;k¡
fyf[k,%
(i) Common defects in wood
lk/kj.k dk"B fodkj
(ii) Dimensional stabilization of wood
dk"B ds ifjek.kh; fLFkjrk
6. Differentiate between the following with examples :
fuEufyf[kr esa mnkgj.k lfgr vUrj dhft,A
(i) Strength and hardness.
LVªsUFk ,oa gkMZusl
(ii) Oil type preservative and water soluble preservative.
rSyh; dk"B laj{kd ,oa ikuh esa ?kqyu'khy
laj{kd
7. Briefly discuss the water soluble types of preservatives.
ty esa ?kqyu'khy ifjj{kdksa dk la{ksi esa o.kZu dhft,A
8. Write a brief note on species used in paper making process.
dkxt cukus esa iz;qDr gksus okyh iztkfr;ksa ij laf{kIr fVIi.kh fyf[k,A
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