Deck 3: Wood, Brick and Kiln Production

Question 1

Stain appears in wood due to

A)poor ventilation during storage
B)contact with water and chemicals for long time
C)shock when it was young
D)crushing during growth

Answer 1

contact with water and chemicals for long time

Question 2

Honeycomb and cracks may occur in timber due to

A)erroneous conversion
B)erroneous seasoning
C)attack by fungi
D)contact with water for a long time

Answer 2

erroneous seasoning

Question 3

Which one of the following is not a preservative of timber

A)solignum salt
B)chemical salt
C)creosote
D)solution of barium hydroxide

Answer 3

solution of barium hydroxide

Question 4

A thin sheet of wood sliced from log is called

A)plywood
B)lamin board
C)veneer
D)particle board

Question 5

In a plywood the veneers are placed such that the gra ns of a layer are

A)at 45° to the grains of a layer below it
B)at 60° to the grains of a layer below it
C)at right angles to the layer below it
D)at 180° to the grains of a layer below it

Question 6

Plywood is identified by

A)volume
B)weight
C)area
D)thickness

Question 7

An assembled product made up of veneers and adhesives is called

A)batten
B)plank
C)board
D)plywood

Question 8

Particle boards are manufactured by using

A)chips of wood, rice husk and bagasse
B)strips of wood of width 25-80 mm
C)wood pulp
D)none of the above

Question 9

The wood that cannot be attacked by white ants is

A)mahogany
B)rosewood
C)sissoo
D)teak

Question 10

The standard size of bricks as per Indian Standards is

A)230 × 120 × 80 mm
B)200 × 100 × 100 mm
C)190 × 90 × 90 mm
D)190 × 100 × 100 mm

Question 11

Red colour of brick is due to the pre ence of

A)lime
B)silica
C)manganese
D)iron oxide

Question 12

Excess of lime in the brick earth makes the bricks

A)brittle and weak
B)crack and warp
C)melt and lose shape
D)improve durability

Question 13

Excess of iron oxide in brick earth makes the bricks

A)stronger
B)darker
C)brittle
D)crack

Question 14

Alumina in brick earth gives the bricks

A)strength
B)colour
C)plasticity
D)resistance to shrinkage

Question 15

Excess of alkalies in the brick earth results into

A)Brittleness
B)white patches
C)yellowish colour
D)porous structure

Question 16

Pug mill is used to

A)blend clay
B)tempering
C)weathering clay
D)burning bricks

Question 17

The size of mould used for making bricks compared to size of brick is

A)10% more
B)5% more
C)exactly equal
D)5% less

Question 18

Pallet board is used to

A)make frog in the brick
B)to mount the mould
C)for table moulding of bricks
D)none of the above

Question 19

In stiff mud process of machine moulding, water used for mixing is

A)8-12%
B)12-18%
C)20-24%
D)30%

Question 20

Gradual drying of moulded bricks is necessary to

A)prevent shrinkage
B)permit shrinkage without cracking
C)permit blending of alumina and silica
D)none of the above

Question 21

The brick is considered dry when the moisture content is

A)8%
B)5%
C)2%
D)zero

Question 22

Hand moulded bricks take ______ days for drying while stiff-mud machine made bricks ______ days.

A)30, 5
B)15, 2
C)10, 1
D)8, 1/4

Question 23

The indentation mark left on bricks during the process of moulding are

A)pallets
B)fillets
C)marks
D)frog

Question 24

Which one of the following statements is wrong about clamp burning

A)it is cheap
B)does not need skilled labour
C)control on burning process is good
D)burning process is slow

Question 25

Continuous kiln is

A)bull's trench kiln
B)Hoffman's kiln
C)tunnel kiln
D)all of the above