A good brick earth should contain:
About 20% to 30% of alumina
About 50% to 60% of silica
Not more than 5% of lime
All the above
Correct Answer :
D. All the above
Related Questions
If water required for 1 bag of cement is 30 litres, the water cement ratio is:
0.40
0.50
0.60
None of these
The type of steel used for precision levelling staff, is
Titanium steel
Carbon steel
Invar
Stainless steel
Asbestos
Is an excellent insulator for heat and electricity
Is fire-proof and acid proof
Has sp. gravity equal to 3.10
All the above
Rapid hardening cement attains early strength due to
Larger proportion of lime grounded finer than normal cement
Lesser proportion of lime grounded coarser than normal cement
Lesser proportion of lime grounded finer than normal cement
Excess percentage of gypsum
Manganese steels
Are non-magnetic
Possess high electrical resistance
Possess low coefficient of expansion
All the above
The method of addition polymerization is used for obtaining:
Polystyrene
Polypropylene
Polyvinylchloride
All of these
Expansion Joints in masonry walls are provided in wall lengths usater than
10 m
20 m
30 m
40 m
Good quality stones must
Be durable
Be free from clay
Resist action of acids
All the above
Which one of the following is an air binding material?
Gypsum
Acid-resistant cement
Quick lime
All of these
Bessemer process is used for the manufacture of
Pig iron
Cast iron
Wrought iron
Steel
A bull nose brick is not used for
Rounding off sharp corners
Pillars
Decoration purpose
Arches
The most fire resistant paints are:
Enamel paints
Aluminium paints
Asbestos paints
Cement paints
Laterite is a/an
Volcanic rock
Argillaceous rock
Calcareous rock
Siliceous rock
In a rock calcium carbonate predominates. State whether it is:
Siliceous rock
Argillaceous rock
Calcareous rock
None of these
Formula for quick lime, is
CaCO3
Ca(OH)2
CO3CO2
None to these
Pug mill is used for
Preparation of clay
Moulding of clay
Drying of bricks
Burning of bricks
Which one of the following polymers is obtained from condensation polymerization?
Phenol formaldehyde
Carbamide
Melamine-formaldehyde
All of these
The main constituent of cement which is responsible for initial setting of cement is
Di-calcium silicate
Tri-calcium silicate
Tri-calcium aluminate
All of the above
Asbestos is
Corrugated sheet used for roofing
An incombustible fire proof material
An organic substance
All the above
A heavy stone is suitable for
Arches
Rubble masonry
Roads
Retaining walls
Brass is an alloy of
Copper and zinc
Zinc and lead
Tin and silver
Zinc and nickel
Acrylic sheets
Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
Are generally unaffected by most household detergents
Possess the light transmission rate of 93%
All the above
For sanitary pipes and chemical stonewares,
Salt glazing is used
Lead glazing is used
Opaque glazing is used
None of these
Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is
0°
30°
45°
90°
Seasoning of timber is done
To make it water proof
To paint its surface
To increase its temperature
To remove water
Pick up the correct statement from the following:
Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer
Cupola furnace is used for the manufacture of cast iron
Red short iron is of no value for welding purpose
All the above
Plywood is made from
Common timber
Bamboo fibre
Teak wood only
Asbestos sheets
Lime stone is not a
Sedimentary rock
Stratified rock
Aqueous rock
Metamorphic rock
Pick up the correct statement from the following:
Melamine is obtained from calcium carbide
Formaldehyde is prepared synthetically from methane
The melamine when reacted with formaldehyde forms the melamineformaldehyde resin
All the above
Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig