Stones used for rubble masonry must be
Soft
Hard
Light
Heavy
Correct Answer :
B. Hard
Related Questions
Pick up the volcanic rock from the following:
Granite
Dolerite
Basalt
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
The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks
Slacking of lime is affected by
Keeping it exposed to air
Immersing the lime in water
Crushing the lime lumps
None of these
If the iron ore contains clay as an impurity, the flux added during calcination, is
Clay
Lime stone
Argillaceous iron ore
All the above
The main constituent of fly-ash, is
Aluminium oxide
Silica
Ferrous oxide
All of these
Duco paints are
Plastic paints
Cellulose paints
Emulsion paints
Oil paints
Good quality cement contains higher percentage of
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
If the ore impurities is
Clay, lime stone is used as flux
Lime stone, clay is used as flux
Quartz, lime stone and argillaceous iron ores are used as flux
All the above
Pick up the correct statement from the following:
The plastic bottles are made by the process of blowing
The application of thermo-setting resins on sheets of paper, is called laminating process
The plastic articles made by placing raw material in the desired moulds, is known as moulding process
All the above
The hardest rock is
Marble
Diamond
Talc
Quartz
Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?
Lime stone and alumina
Silica and alkalies
Alumina and iron
Alkalies and magnesium
Which of the following metamorphic rocks has the most weather resisting characteristics?
Marble
Quartzite
Slate
Lime stone
The weight of 1 m3 of brick earth, is about
1200 kg
1500 kg
1800 kg
2000 kg
Cast iron
Is obtained by purifying pig iron
Is manufactured in required shapes
May contain 2 to 5 per cent of carbon with other impurities
All the above
During pudding
Molten metal is kept clear of the fuel
Carbon is converted into carbonic acid gas
Silicon forms a slag
All the above
For the manufacture of plywood, veneers are placed so that grains of adjacent veneers
Run at right angles
Parallel
Inclined at 45°
Inclined at 60°
Portland pozzolana cement possesses
Higher resistance to chemical attack
Lower heat of hydration
Lower shrinkage on drying
All the above
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
For testing compressive strength of cement, the size of cube used is
50 mm
70.6 mm
100 mm
150 mm
Varnish is a transparent or semi-transparent solution of resinous substances in
Alcohol
Linseed
Turpentine
All the above
Pick up the correct statement from the following:
Acid test is done to find out the weathering quality of stones
Attrition test is done to find out the rate of wear of stones which are used in road construction
Crushing test is done to find out the compressive strength of the stone
All the above
The practical limit of moisture content achieved in air drying of timber is
5 %
15 %
25 %
35 %
Which of the following trees yields hard wood?
Deodar
Chir
Shishum
Pine
The most durable varnish is
Water varnish
Spirit varnish
Turpentine varnish
Oil varnish
Mastic asphalt is
Acid resisting material
Non-corrosive material
Corrosive material
Heating-resisting material
Pick up the correct statement from the following:
The lime in excess makes the cement unsound and causes the cement to expand and disintegrate
The silica in excess makes the cement stronger but its setting time also increases
The excess amount of alumina weakens the cement
All the above
The most commonly used synthetic abrasive is
Aluminium carbide
Boric acid
Silicon
All of these
Paints with white lead base are suitable for painting of
Wood work
Iron work
Both wood work and iron work
None of the above
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