The kiln which may work throughout the year, is
Clamp
Bull's kiln
Hoffman's kiln
None of these
Correct Answer :
C. Hoffman's kiln
Related Questions
In the method of condensation polymerization,
Low-molecular substances are removed from the high molecular substance
The reaction proceeds with an evolution of ammonia
The reaction proceeds with an evolution of hydrogen chloride
All of the above
The foliated structure is very common in
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Slate is formed by metamorphic action on
Shale
Lime stone
Sand stone
Granite
The percentage of alumina and silica in good fire clay vary respectively is
25, 75
30, 70
35, 65
All of these
Seasoning of timber is done for
Increasing moisture content
Decreasing moisture content
Increasing strength of timber
None to these
The pressure acting on the stones in stone masonry construction should be
Along the direction of bedding planes
At 45° to the direction of bedding planes
At 60° to the direction of bedding planes
Perpendicular to the direction of bedding planes
In stone masonry, stones (stratified rocks) are so placed that the direction of pressure to the plane of bedding is
Right angles
45°
60°
Parallel
The operation of removal of impurities or clay adhering to iron ores, is known as
Dressing
Calcination
Roasting
Smelting
Bitumen in
Solid state, is called asphalt
Semi fluid state, is called mineral tar
Fluid state, is called petroleum
All the above
Distemper is
A paint consisting of powdered chalk, pigments and water
A water proofing agent
A paint consisting of coloured cement and water
A drying agent
Smith's test of stones is performed to find out
The presence of soluble matter of stone
The compressive strength of the stone
The hardness of the stone
The toughness of the stone
Depending on the chemical composition and mechanical properties, iron may be classified as
Cast iron
Wrought iron
Steel
All the above
Lacquer paints
Are generally applied on structural steel
Are less durable as compared to enamel paints
Consist of resin and nitro-cellulose
All the above
According to ISI, bitumen is classified into
2 grades
4 grades
8 grades
10 grades
In a rock calcium carbonate predominates. State whether it is:
Siliceous rock
Argillaceous rock
Calcareous rock
None of these
Which of the following is the purest form of iron?
Cast iron
Wrought iron
Mild steel
High carbon steel
Portland pozzolana cement possesses
Higher resistance to chemical attack
Lower heat of hydration
Lower shrinkage on drying
All the above
The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
15, 75, 10
75, 10, 15
10, 15, 75
10, 75, 15
The most important tool in brick laying for lifting and spreading mortar and for forming joints is
Trowel
Square
Bolster
Scutch
Basalt is
Sedimentary rock
Metamorphic rock
Extrusive igneous rock
Intrusive igneous rock
Bitumen emulsion is
A liquid containing bitumen in suspension
A paint
Used as anti-corrosive paint
All the above
If the iron ore contains clay as an impurity, the flux added during calcination, is
Clay
Lime stone
Argillaceous iron ore
All the above
Bituminous fells are used for
Covering A.C. sheets
Covering sloping roofs
D.P.C.
None to these
Pick up the correct statement regarding low heat cement from the following:
It possesses less compressive strength
Its initial setting time is about one hour
Its final setting time is about 10 hours
All the above
The process of mixing clay, water and other ingredients to make brick is known as
Kneading
Moulding
Pugging
Drying
Pick up the correct statement from the following:
Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
Cracked paints may be cured by removing paint and giving a fresh coat of paint
Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
All the above
Mastic asphalt is
Acid resisting material
Non-corrosive material
Corrosive material
Heating-resisting material
Plastic asphalt is
Used as a water proofing layer over roof
A mixture of cement and asphalt
A natural asphalt
A refinery product
Oil varnish generally consists of
Synthetic resin and spirit
Oil, wax and resin
Resin, oil and turpentine
Spirit, oil and wax
Which of the following is a mineral?
Basalt
Granite
Quartz
Syenite