Pick up the polymineralic rock from the following:
Quartz sand
Pure gypsum
Magnesite
Granite
Correct Answer :
D. Granite
Related Questions
The amount of water used for one kg of distemper is
0.2 liter
0.4 liter
0.6 liter
0.8 liter
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
Plastic
Is an organic substance
Consists of natural or synthetic binders
Finished products are rigid and stable at normal temperature
All the above
The tendency of a stone is, to split along:
Texture
Fracture
Cleavage
Structure
Pig iron obtained from the furnace which is properly provided with fuel at a very high temperature, is called
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig
Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
The commonly used lime in white washing, is
White lime
Fat lime
Hydraulic lime
Quick lime
Bitumen in
Solid state, is called asphalt
Semi fluid state, is called mineral tar
Fluid state, is called petroleum
All the above
Based on its dry weight, a freshly felled tree may contain water
25 %
50 %
75 %
100 %
Granite mainly composed of quartz and feldspar particles, is obtained from
Sedimentary rocks
Metamorphic rocks
Igneous rocks
All the above
The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as
Cementation process
Crucible process
Bessemer process
Open hearth process
The commonly used thinner in oil paints, is
Naphtha
Turpentine
Both (a) and (b)
None the these
The portion of the brick cut across its width and having its length equal to that of a full brick, is known as
Closer
Queen closer
King closer
Prince closer
The PVC doors and windows are preferred as they are
Rust proof
Rot proof
Water proof
All of these
The most commonly used synthetic abrasive is
Aluminium carbide
Boric acid
Silicon
All of these
Pick up the incorrect statement from the following:
Hydraulic lime is generally obtained by burning kankar
Hydraulic lime sets slowly as compared to fat lime
Hydraulic lime is generally used in lime mortar
None of these
Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below:
Both A and R is true and R is correct explanation of A
Both A and R is true and R is not a correct explanation of A
A is true but R is false
A is false but R is true
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
The weight of 1 m3 of brick earth, is about
1200 kg
1500 kg
1800 kg
2000 kg
Lacquer is
Oil paint
Distemper
Spirit varnish
None to these
For testing compressive strength of cement, the size of cube used is
50 mm
70.6 mm
100 mm
150 mm
The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
15, 75, 10
75, 10, 15
10, 15, 75
10, 75, 15
Dextrin is
Animal glue
Starch glue
Albumin glue
Rubber based adhesive
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
The operation of removal of impurities or clay adhering to iron ores, is known as
Dressing
Calcination
Roasting
Smelting
Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig
The main function of alumina in brick earth is
To impart plasticity
To make the brick durable
To prevent shrinkage
To make the brick impermeable
The presence of original rounded surface on the manufactured piece of timber, is called
Wane
Torn grain
Diagonal grain
Chipmark
The size of mould for bricks, is generally kept
A little large to specified size
A little small to specified size
Equal to specified size
10% larger than specified size
Lacquer paints
Are generally applied on structural steel
Are less durable as compared to enamel paints
Consist of resin and nitro-cellulose
All the above