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
Correct Answer :
D. All the above
Related Questions
Pig iron is manufactured from the ores by
Dressing
Calcination and roasting
Smelting
All the above
Asbestos is
Corrugated sheet used for roofing
An incombustible fire proof material
An organic substance
All the above
The most fire resistant paints are:
Enamel paints
Aluminium paints
Asbestos paints
Cement paints
Inner part of a timber log surrounding the pitch, is called
Sapwood
Cambium layer
Heart wood
None to these
Percentage of carbon content in mild steel is
Less than 0.25
Between 0.25 and 0.7
Between 0.7 and 1.5
Greater than 1.5
In paints, the pigment is responsible for
Durability
Colour
Smoothness
Glassy face
Pegmatite is a/an
Intrusive igneous rock
Extrusive igneous rock
Sedimentary rock
Metamorphic rock
The practical limit of moisture content achieved in air drying of timber is
5 %
15 %
25 %
35 %
Pick up the volcanic rock from the following:
Granite
Dolerite
Basalt
All the above
The hardest rock is
Marble
Diamond
Talc
Quartz
For preparing porcelains, the clay should be
Sufficiently pure
Of high degree of tenacity
Of good plasticity
All the above
The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are known as
Knots
Rindgalls
Burls
None of these
Dextrin is
Animal glue
Starch glue
Albumin glue
Rubber based adhesive
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
Duco is one of the patent forms of
Emulsion paints
Plastic paints
Bituminous paints
Cellulose paints
The most common admixture which is used to accelerate the initial set of concrete is
Gypsum
Calcium chloride
Calcium carbonate
None of the above
The most important constituent of an oil paint, is
Thinner
Vehicle
Pigment
All the above
According to ISI, bitumen is classified into
2 grades
4 grades
8 grades
10 grades
A pug mill is used for
Softening brick earth
Moulding brick earth
Tempering brick earth
Providing brick earth
Refractory bricks are
Neutral refractory bricks
Acid refractory bricks
Basic refractory bricks
All the above
The ultimate tensile strength of structural mild steel is about
160 N/mm²
260 N/mm²
420 N/mm²
520 N/mm²
The percentage of alumina and silica in good fire clay vary respectively is
25, 75
30, 70
35, 65
All of these
Pick up the correct statement from the following:
Soft stones are required for carving
Light stones are required for arches
Hard stones are required to stand high pressure
All the above
Age of a tree may be ascertained by
Radius of its stem
Circumference of its stem
Number of branches
Number of annual rings
Plastics are compounds of carbon with element
Hydrogen
Nitrogen
Oxygen
All of these
The lime which contains high percentage of calcium oxide, is generally called
Fat lime
Rich lime
White lime
None of these
The usual percentages of clay and metal in cermet are:
50%, 50%
60%, 40%
70%, 30%
80%, 20%
The initial setting time of lime-pozzolana, is
30 minutes
60 minutes
90 minutes
120 minutes
Pick up the plutonic rock from the following:
Granite
Dolerite
Basalt
All the above
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