timber

Question 1

in hard wood annular rings are

Answer 1

less distinct and nearer to each other

Question 2

timber can be made fire resistant by

Answer 2

soaking in ammonium sulphate

Question 3

seasoning best for large scale

Answer 3

kiln seasoning

Question 4

boucherie process is used for

Answer 4

treatment of green timber

Question 5

in wood how many coats of plastering is reqd

Answer 5

no plastreing we only do painting

Question 6

modulus of elasticity of timber is

Answer 6

0.5 to 1 x 10^4 N/mm2

Question 7

time taken for artificial seasoning of timber

Answer 7

4 - 5 days

Question 8

defect caused by imperfect seasoning

Answer 8

honeycombing

Question 9

When timber is burnt in the wood fire over a depth of about 15 mm, the process of treatment is known as______.

Answer 9

charring

Question 10

time taken for natural seasoning of timber

Answer 10

60 - 90 days

Question 11

decraesing order of effectiveness of method of preservation of timber

Answer 11

brushing/spraying>dipping>pressure impregnation

Question 12

The defect caused due to over-maturity and unventilated storage of the wood during its transit, is called

Answer 12

foxiness

Question 13

which quality of timber can be improved by abels process

Answer 13

fire resistance

Question 14

creosote oil applied in timber helps

Answer 14

protects from fungi

Question 15

code for seasoning

Answer 15

IS 1141-1948

Question 16

bethels process is used for

Answer 16

seasoning of timber

Question 17

trees used for making sports goods

Answer 17

willow trees, mulberry

Question 18

wooden mould is made from

Answer 18

shsishum wood

Question 19

timber having maxm resistance against white ants and higher valuw

Answer 19

teak

Question 20

the piece of sawn timber whose dimensions do not exceed 5 cm either in breadth or in thickness is known as

Answer 20

batten

Question 21

life of teak wood doors and windows

Answer 21

40 yrs

Question 22

timber used for

• tennis rackets
• agricultural tools
• boats
• furniture

Answer 22

tennis rackets - mulberry

• agricultural tools - babul
• boats - BEN TEAK
• furniture - bijasal

Question 23

which is strongest, least durable, lightest?

Answer 23

strongest - sal
least durable - mango
lightest - deodar

Question 24

advantage of plywood

Answer 24

tensile strength is same in all directions
reduced shrinkage and swelling
availability of thin large size sheets
greater impact resistance
obtained from timber

Question 25

in plywood grains of veneer are

Answer 25

at right angles

Question 26

fibre board (hard board) can be used for

Answer 26

furniture