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BMC II - TIMBER - Part 1

Total questions: 30

Worksheet time: 41mins

Name
Class
Date
1.

Knots in timber are

a)

Defects caused by crushing fibres

b)

Splits radiating from the centre

c)

Speckled strains

d)

Signs of branches cut off

2.

Seasoning of timber is essential to remove

a)

Knots from timber

b)

Sap from timber

c)

Twisted fiber from timber

d)

Roughness of timber

3.

The surface of freshly cut timber should be:

a)

Soft and shining

b)

Hard and shining

c)

Perfectly round

d)

Light in colour

4.

The quality of timber does not depend upon:

a)

Maturity of tree

b)

Time of felling

c)

Type of tree

d)

Size of tree

5.

Which of the following defects occur in the seasoning process of wood?

a)

Bow

b)

Brown rot

c)

Sap stain

d)

Blue stain

6.

Which of the following is not a variety of industrial timber?

a)

Veneers

b)

Plywood

c)

Fibreboard

d)

Baulk

7.

Batten is a piece of timber whose thickness and breadth do not exceed ________

a)

10 mm

b)

30 mm

c)

50 mm

d)

100 mm

8.

Breaking down is the process of:

a)

Felling a tree

b)

Conversion of logs

c)

Defect in timber

d)

Reducing weight

9.

What type of a defect in timber is this

a)

Cup

b)

Bow

c)

Twist

d)

Check

10.

Veeners are thinner than

a)

10 mm

b)

5 mm

c)

3 mm

11.

Name four types of plywood

4 lines
12.

Write 4 qualities of a good timber

4 lines
13.

Two types of Natural seasoning

4 lines
14.

Name 4 types of defects due to seasoning of timber

4 lines
15.

Name two types of lengthening joints

4 lines
16.

Which of the following is a housed angle joint

a)
b)
c)
17.

Which of the following is NOT a lengthening joint

a)
b)
c)
d)
18.

What type of bearing joinery is shown in the figure

a)

TEE halved

b)

longitudinal halved

c)

Angle halved

19.

What type of widening joint is shown

a)

Splayed

b)

Dowelled

c)

Rebated

20.

. ___________________ is the simplest form of joinery in timber

a)

Lapped

b)

Angled

c)

Lengthening

d)

Bearing

21.

_____________________ joints are employed to connect the members at an angle other than a right angle.

a)

Angle

b)

Lapped

c)

Oblique

d)

Bearing

22.

Explain Chemical Seasoning

4 lines
23.

Name any four market forms of timber

4 lines
24.

What are annual rings and what is pith in structure of timber?

4 lines
25.

What is standing timber, Rough timber and converted timber

4 lines
26.

What is the image that you see

a)

Drying of timber

b)

Kiln seasoning

c)

Chemical seasoning

d)

Stacking of timber

27.

What type of defect of timber is this

a)

Knot

b)

Upset

c)

RInd gall

d)

Twisted fibre

28.

What are the defects in timber due to insects

4 lines
29.

Name 4 commercial forms of timber

4 lines
30.

Write 5 uses of timber

4 lines

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