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
Correct Answer :
D. All the above
Related Questions
The base material for distemper, is
Chalk
Lime
Lime putty
Cement wash
The constituent of cement which is responsible for all the undesirable properties of cement is
Di-calcium silicate
Tri-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Resins are
Not soluble in water
Soluble in spirit
Used in varnishes
Left behind on evaporation of oil
Teak wood is suitable for
Sports articles
Furnitures
Railway sleepers
All the above
Oil varnish generally consists of
Synthetic resin and spirit
Oil, wax and resin
Resin, oil and turpentine
Spirit, oil and wax
Non acid-resistant asbestos is:
Tremolite asbestos
Chrysotile asbestos
Amosite asbestos
None of these
Pick up the correct statement from the following:
Rust is due to formation of oxides
Cast iron oxidises less
Steel oxidises most
All the above
PVC stands for
Plastic very compact
Polythene vinyl chloride
Polythene vinyl carbon
Polythene vanadium carbide
The lime which contains mainly calcium oxide and slacks with water, is
Fat lime
Quick lime
Hydraulic lime
Poor lime
Pick up the correct statement from the following:
The plywoods do not split or crack due to changes in atmosphere
The commercial plywoods are available upto 150 cm wide and upto 300 cm long
The plywoods possess uniform tensile strength in all directions
All the above
The specific gravity of marble, is
2.50
2.60
2.66
2.72
Bitumen felt
Is used as water proofing material
Is used as damp proofing material
Is made from bitumen and hessian fibres
All the above
Addition of pozzolana to ordinary Portland cement increases
Bleeding
Shrinkage
Permeability
Heat of hydration
The steel used for rails under heavy traffic and on sharp curves, is
Nickel steel
Chrome steel
Manganese steel
Vanadium steel
Shingle is
Decomposed laterite
Crushed granite
Water bound pebbles
Air weathered rock
The main ingredients of Portland cement are
Lime and silica
Lime and alumina
Silica and alumina
Lime and iron
Pick up the correct statement from the following: Method of sawing timber
Tangentially to annual rings, is known as tangential method
In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method
Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing
All the above
Calcination of iron ores is done
To remove moisture
To remove carbonic acid
By roasting in heaps
All the above
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
The steel which contains fissures and cavities, is manufactured by
Cementation process
Crucible process
Bessemer process
Open hearth process
Quick lime is
Calcium carbonate
Calcium oxide
Calcium hydroxide
None of the above
Rapid hardening cement contains
Tri-calcium silicate
Tri-calcium aluminate
Tetra-calcium alumino-ferrite
Di-calcium silicate
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 most fire resistant paints are:
Enamel paints
Aluminium paints
Asbestos paints
Cement paints
Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite The correct answer is
Only (iii)
Both (i) and (iii)
Both (ii) and (iii)
All (i), (ii) and (iii)
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
Generally wooden moulds are made from
Ply wood
Shishum wood
Deodar wood
Teak wood
Gypsum is a
Mechanically formed sedimentary rock
Igneous rock
Chemically precipitated sedimentary rock
Metamorphic rock
Plaster of Paris is obtained by calcining
Bauxite
Gypsum
Lime stone
None of these
Good quality sand is never obtained from
River
Lake
Sea
Gravel powder