Pug mill is used for
Preparation of clay
Moulding of clay
Drying of bricks
Burning of bricks
Correct Answer :
A. Preparation of clay
Related Questions
Advantage of a clamp compared to a kiln for burning bricks is that
It takes less time for burning
It gives more output of first class bricks
It has less initial cost
It is suitable when bricks are required in large numbers
To give a brilliant finish, the type of varnish used, is
Water varnish
Spirit varnish
Turpentine varnish
Oil varnish
Proper amount of entrained air in concrete results in (i) Better workability (ii) Better resistance to freezing and thawing (iii) Lesser workability (iv) Less resistance to freezing and thawing The correct answer is
(i) and (ii)
(i) and (iv)
(ii) and (iii)
(iii) and (iv)
Plywood is normally available
1 mm thick
2 mm thick
2 to 3 mm thick
3 mm to 4 mm thick
The practical limit of moisture content achieved in air drying of timber is
5 %
15 %
25 %
35 %
The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick
20 %
15 %
10 %
None of these
Pick up the correct statement from the following:
In stone arches, the stones are placed with their natural beds radial
In cornices, the stones are placed with their natural beds as vertical
In stone walls, the stones are placed with their natural beds as horizontal
All the above
The size of modular bricks, is
10 × 10 × 9 cm
19 × 9 × 9 cm
22.5 × 10 × 8.5 cm
22.5 × 8.0 × 9 cm
Seasoning of timber is essential to remove
Knots from timber
Sap from timber
Twisted fibre from timber
Roughness of timber
Pick up correct statement from the following:
Fibre boards are used for thermal and acoustic control
Fibre boards are used for light weight standing members
Fibre boards are obtained by impregnating a resin product on fibres
All the above
Minimum required water cement ratio for a workable concrete, is
0.30
0.40
0.50
0.60
Pick up the correct statement from the following:
Plastics have generally low melting point
The coefficient of thermal expansion of plastics is about three times than that of steel
The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
All the above
For filling cracks in masonry structures, the type of bitumen used, is
Cut-back bitumen
Bitumen-emulsion
Blown bitumen
Plastic bitumen
Minimum thickness of wall where single Flemish bond can be used is
Half brick thick
One brick thick
One and a half bricks thick
Two bricks thick
Mild steel is used for
Structural works in beams, joints and girders
Small sized water pipes
Columns and struts
None of these
Bituminous fells are used for
Covering A.C. sheets
Covering sloping roofs
D.P.C.
None to these
The ultimate tensile strength of structural mild steel is about
160 N/mm²
260 N/mm²
420 N/mm²
520 N/mm²
Spirit varnish generally consists of
Oil, wax and resin
Alcohol, wax and turpentine
Pigment and synthetic resin
Spirit and shellac
Pick up the correct statement from the following:
Quick lime is obtained by burning pure lime stone
Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
Poor lime is obtained by burning lime stone containing impurities more than 5%
All the above
Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
Which of the following is the purest form of iron?
Cast iron
Wrought iron
Mild steel
High carbon steel
Pick up the correct statement from the following:
Slaked lime contains calcium hydroxide
Quick lime contains calcium oxide
Slaked lime may be obtained from quick lime
All the above
Cement paints usually
Contain hydrated lime
Contain 5% to 10% colour pigments
Contain 5% sodium chloride
All the above
Refractory bricks are
Neutral refractory bricks
Acid refractory bricks
Basic refractory bricks
All the above
Putty is
Made with finely powdered chalk and linseed oil
Used for fixing glass panes
Softened by a solution of pearl ash and quick-lime soaked in water
All the above
A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
10 %
15 %
20 %
25 %
A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called
Slate
Plank
Board
Strip
Glazing of clay products, is done
To improve their appearance
To protect them from atmospheric effect
To protect them from corrosive action
All the above
Percentage of silica in a good brick earth lies between
5 to 10 %
20 to 30 %
50 to 60 %
70 to 80 %
Lacquer is
Oil paint
Distemper
Spirit varnish
None to these