Quick setting cement is produced by adding
Less amount of gypsum in very fine powdered form
More amount of gypsum in very fine powdered form
Aluminium sulphate in very fine powdered form
Pozzolana in very fine powdered form
Correct Answer :
C. Aluminium sulphate in very fine powdered form
Related Questions
The stone suitable for rubble masonry should be.
Hard
Tough
Heavy
Light
Seasoning is
A process of removing sap
Creosoting
Painting with sodium silicate
Coating with tar
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
Wrought iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Plywood is normally available
1 mm thick
2 mm thick
2 to 3 mm thick
3 mm to 4 mm thick
Refractory bricks are
Neutral refractory bricks
Acid refractory bricks
Basic refractory bricks
All the above
Pick up the hypabyssal rock from the following:
Granite
Dolerite
Basalt
All the above
Bitumen in
Solid state, is called asphalt
Semi fluid state, is called mineral tar
Fluid state, is called petroleum
All the above
Polymerization helps to improve the property of
Strength
Rigidity
Elasticity
All of these
The type of steel used for precision levelling staff, is
Titanium steel
Carbon steel
Invar
Stainless steel
Lacquer is
Oil paint
Distemper
Spirit varnish
None to these
Galvanising means covering iron with a thin coat of
Tin
Zinc
Glaze
Coal tar
The commonly used thinner in oil paints, is
Naphtha
Turpentine
Both (a) and (b)
None the these
Seasoning of timber is essential to remove
Knots from timber
Sap from timber
Twisted fibre from timber
Roughness of timber
The coefficient of hardness of stones used in road work should be greater than
10
12
15
17
The most commonly used retarder in cement is
Gypsum
Calcium chloride
Calcium carbonate
None of the above
The steel used in R.C.C. work is
Stainless steel
Mild steel
High carbon steel
Wrought iron
The plastics made from cellulose resin
Are as clear as glass
Are tough and strong
Possess excellent electrical properties
All the above
Mastic asphalt is
Water proof
Fire proof
Elastic
All the above
The nominal size of the modular brick is
190 mm × 90 mm × 80 mm
190 mm × 190 mm × 90 mm
200 mm × 100 mm × 100 mm
200 mm × 200 mm × 100 mm
The trunk of tree left after cutting all the branches is known as
Log
Batten
Plank
Baulk
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:
The theory of formation of concrete is based on the phenomena of formation of voids
The bulking of sand is taken into account while volumetric proportioning of the aggregates
The dry sand and the sand completely flooded with water, have practically the same volume
All the above
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
Quick lime (or caustic lime)
Is obtained by the calcination of pure lime stone
Has great affinity to moisture
Is amorphous
All the above
The property by virtue of which lime sets under water, is known as
Slacking
Setting
Hydraulicity
Calcining
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
Initial setting of cement is caused due to
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
For high grade instruments the steel preferred to, is
Cast steel
Bessemer steel
Mild steel
Whitworth compressed steel
The stones obtained by blasting are used as
Ballast in railways
Aggregates for concrete
Road metal
All the above