Lime mortar is generally made with
Quick lime
Fat lime
Hydraulic lime
Plain lime
Correct Answer :
C. Hydraulic lime
Related Questions
Paints with white lead base are suitable for painting of
Wood work
Iron work
Both wood work and iron work
None of the above
Sapwood consists of
Innermost annular rings around the pith
Portion of timber between heartwood and cambium layer
Thin layers below the bark
Thin fibre which extends from the pith outwards and holds the annular rings together
Quartzite, a metamorphic stone is
Hard
Brittle
Crystalline
All the above
Formula for quick lime, is
CaCO3
Ca(OH)2
CO3CO2
None to these
Initial setting of cement is caused due to
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
The harmonious mixing of the clay ingredients, is known as
Weathering
Blending
Tempering
None of these
The compound of Portland cement which reacts immediately with water and also sets first is
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Dorry's testing machine is used for
Crushing test of stone
Hardness test of stone
Impact test of stone
Water absorption test
If the iron ore contains clay as an impurity, the flux added during calcination, is
Clay
Lime stone
Argillaceous iron ore
All the above
For one cubic metre of brick masonry, number of bricks required, is
400
425
450
500
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
The most valuable timber may be obtained from
Chir
Shishum
Sal
Teak
Early attainment of strength in rapid hardening cement is mainly due to
Gypsum
Finer grinding
Tri-calcium silicate
Tri-calcium aluminate
Bitumen may be dissolved in
Carbondioxide
Water
Sodium chloride
Carbon disulphide
The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is
Less than 1
Equal to 1
Greater than 1
Less than 1 in beams but greater than 1 in channels
PVC stands for
Plastic very compact
Polythene vinyl chloride
Polythene vinyl carbon
Polythene vanadium carbide
Laterite is a/an
Volcanic rock
Argillaceous rock
Calcareous rock
Siliceous rock
Minimum of 40% of iron, is available in
Magnetite
Red haematite
Limonite
Black band
Fibre glass
Retains heat-longer
Has a higher strength to weight ratio
Is shock proof and fire retardant
All the above
Stones used for ornamental work must be
Soft
Hard
Light
Heavy
The portion of a brick cut to form angles other than right angles in plan, is known as
Queen closer
King closer
Closer
Squint brick
Which of the following metamorphic rocks has the most weather resisting characteristics?
Marble
Quartzite
Slate
Lime stone
For a 50 kg cement bag water required, is
16.5 litres
18.5 litres
20.5 litres
22.5 litres
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 hardest rock is
Marble
Diamond
Talc
Quartz
Which one of the following is used for preparing porcelain?
Clay
Feldspar
Quartz
All of these
The most commonly used synthetic abrasive is
Aluminium carbide
Boric acid
Silicon
All of these
The most important tool in brick laying for lifting and spreading mortar and for forming joints is
Trowel
Square
Bolster
Scutch
The slag which floats on the surface of the molten iron generally contains
Lime (CaO) 45%
Silica (SiO2) 35%
Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8%
All the above
Duco paints are
Plastic paints
Cellulose paints
Emulsion paints
Oil paints