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
Correct Answer :
D. All the above
Related Questions
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
Iron ore may contain
Carbon
Silicon
Phosphorus and manganese
All the above
Mastic asphalt is
Acid resisting material
Non-corrosive material
Corrosive material
Heating-resisting material
The frog of a brick is normally made on its
Top face
Bottom face
Longer face
Shorter side
A badly mixed cement concrete results in
Segregation
Bleeding
Honey combing
None of these
Geologically, marble is known as
Sedimentary rock
Igneous rock
Metamorphic rock
Stratified rock
For a 50 kg cement bag water required, is
16.5 litres
18.5 litres
20.5 litres
22.5 litres
The rocks having alumina or clay as their major constituents are known as
Siliceous rocks
Argillaceous rocks
Calcareous rocks
Sedimentary rocks
A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called
Slate
Plank
Board
Strip
The harmonious mixing of the clay ingredients, is known as
Weathering
Blending
Tempering
None of these
The material generally not used as extender in paints, is
Powdered silica
Gypsum
Talc
Zinc white
Mastic asphalt is normally used for
Sound insulation
Water proofing
Fire proofing
None to these
After storage, the strength of cement
Decreases
Increases
Remains same
May increase or decrease
Lime concrete is generally used for
Wall foundations
Flooring at ground level
Both (A) and (B)
Neither (A) nor (B)
The ultimate tensile strength of structural mild steel is about
160 N/mm²
260 N/mm²
420 N/mm²
520 N/mm²
Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
Name the type of cement from the following for canal linings:
Sulphate resisting cement
Rapid hardening cement
Quick setting cement
Pozzolana cement
Bituminous fells are used for
Covering A.C. sheets
Covering sloping roofs
D.P.C.
None to these
The timber having maximum resistance against white ants, is obtained from
Chir
Shishum
Sal
Teak
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
Dolomite is a lime stone which contains carbonate of magnesia upto
15 %
20 %
25 %
45 %
Bitumen emulsion is
A liquid containing bitumen in suspension
A paint
Used as anti-corrosive paint
All the above
For a good building stone, its specific gravity should the greater than
1.5
1.7
2.2
2.7
Early attainment of strength in rapid hardening cement is mainly due to
Gypsum
Finer grinding
Tri-calcium silicate
Tri-calcium aluminate
Pick up the correct statement from the following:
Styrene resin is produced from ethylene which is made from petroleum
Styrene resin is light in weight
Styrene resin transmits ultraviolet waves of light
All the above
Which of the following is a rock?
Quartz
Mica
Gypsum
None of the above
For preparing porcelains, the clay should be
Sufficiently pure
Of high degree of tenacity
Of good plasticity
All the above
The type of steel used for precision levelling staff, is
Titanium steel
Carbon steel
Invar
Stainless steel
Excess of silica in brick earth results in
Cracking and warping of bricks
Loss of cohesion
Enhancing the impermeability of bricks
None of the above