For filling cracks in masonry structures, the type of bitumen used, is
Cut-back bitumen
Bitumen-emulsion
Blown bitumen
Plastic bitumen
Correct Answer :
D. Plastic bitumen
Related Questions
Geologically, marble is known as
Sedimentary rock
Igneous rock
Metamorphic rock
Stratified rock
Pick up the correct statement from the following:
In basic Bessemer process, the steel heats the converter
In open-hearth process, the furnace heats the steel
In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore
All the above
The vehicle used in case of enamel paints is usually
Linseed oil
Water
Varnish
None of the above
Asphalt is obtained from
Petroleum distillation
Bitumen distillation
Plastic distillation
None of these
Snowcrete is one of the patent forms of
Distempers
Water proof cement paints
Enamel paints
Cellulose paints
Sea sand used in structures causes
Dampness
Efflorescence
Disintegration
All of these
Dextrin is
Animal glue
Starch glue
Albumin glue
Rubber based adhesive
Three basic raw materials which are needed in large quantities for production of steel are
Iron ore, coal and sulphur
Iron ore, carbon and sulphur
Iron ore, coal and lime stone
Iron ore, carbon and lime stone
Seasoning is
A process of removing sap
Creosoting
Painting with sodium silicate
Coating with tar
Seasoning of timber is done for
Increasing moisture content
Decreasing moisture content
Increasing strength of timber
None to these
The compound of Portland cement which contributes to the strength after two to three years is
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra-calcium alumino ferrite
The initial setting time of lime-pozzolana, is
30 minutes
60 minutes
90 minutes
120 minutes
Pozzolana (or surkhi) is used in lime
To impart hydraulicity
To prevent shrinkage
To decrease the cost of construction
To decrease the setting time
Pick up the correct statement from the following:
The heating of a material to redness in contact with air, is known as calcination
The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
The product that remains after calcination of limestone, is called lime
All the above
Duco paints are
Plastic paints
Cellulose paints
Emulsion paints
Oil paints
Iron ore may contain
Carbon
Silicon
Phosphorus and manganese
All the above
Porcelain is used as:
Sanitary wares
Electric insulators
Storage vessels
Reactor chambers
According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than
7 MPa
11.5 MPa
16 MPa
21 MPa
For the manufacture of stainless steel, steel is mixed with
Chromium
Nickel
Tungsten
None of these
Gypsum is a
Mechanically formed sedimentary rock
Igneous rock
Chemically precipitated sedimentary rock
Metamorphic rock
Lime concrete is generally used for
Wall foundations
Flooring at ground level
Both (A) and (B)
Neither (A) nor (B)
The percentage of water for normal consistency, is
5% to 15%
10% to 25%
15% to 25%
20% to 30%
The kiln which may work throughout the year, is
Clamp
Bull's kiln
Hoffman's kiln
None of these
Plastic asphalt is
Used as a water proofing layer over roof
A mixture of cement and asphalt
A natural asphalt
A refinery product
Pick up the correct statement from the following:
Catalysts are added to assist and accelerate the hardening of resin
The fillers are inert materials and they impart strength and hardness
Fibrous fillers increase thermal resistance
All the above
For melting one tonne of cast iron
700 m3 air is required
20 kg limestone is required
One quintal coke is required
All the above
Stones used for ornamental work must be
Soft
Hard
Light
Heavy
Dry rot
Cracks the timber
Reduces the strength of timber
Reduces the timber to powder
Spoils the appearance of timber
The weight of 1 m3 of brick earth, is about
1200 kg
1500 kg
1800 kg
2000 kg
Dorry's testing machine is used for
Crushing test of stone
Hardness test of stone
Impact test of stone
Water absorption test