(A)
Acid test is done to find out the weathering quality of stones
(B)
Attrition test is done to find out the rate of wear of stones which are used in road construction
(C)
Crushing test is done to find out the compressive strength of the stone
(D)
All the above
(E)
Adding 5% to 6% of moisture content by weight, increases the volume of dry sand from 18% to 38%
(F)
The bulking of fine sand is more than that of coarse sand
(G)
If the percentage content of moisture exceeds 10%, increase in bulk of sand starts increasing
(H)
All the above
(I)
Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer
(J)
Cupola furnace is used for the manufacture of cast iron
(K)
Red short iron is of no value for welding purpose
(L)
All the above
(M)
Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
(N)
Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
(O)
Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
(P)
All the above
(Q)
Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
(R)
Cracked paints may be cured by removing paint and giving a fresh coat of paint
(S)
Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
(T)
All the above
(U)
The free quartz suddenly expands at a temperature lower than 600°C
(V)
The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO 2
(W)
The sand stone with silicates resist a fire in a better way
(X)
The argillaceous stone though poor in strength can resist fire quite weak
(Y)
The heating of a material to redness in contact with air, is known as calcination
(Z)
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
(])
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
(a)
The percentage of absorption for firebricks varies from 5 to 10
(b)
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
(c)
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
(d)
All the above
(e)
The phenol is carbolic acid
(f)
The phenol is either extracted from coal-tar or prepared from benzene
(g)
Phenol reacts with formaldehyde, to form phenol formaldehyde resin
(h)
All the above
(i)
The plastic bottles are made by the process of blowing
(j)
The application of thermo-setting resins on sheets of paper, is called laminating process
(k)
The plastic articles made by placing raw material in the desired moulds, is known as moulding process
(l)
All the above
(m)
The plywoods do not split or crack due to changes in atmosphere
(n)
The commercial plywoods are available upto 150 cm wide and upto 300 cm long
(o)
The plywoods possess uniform tensile strength in all directions
(p)
All the above
(q)
The substance which consists of one primary chemical, is known as monomer
(r)
The polymer consists of thousands of monomers joined together
(s)
The polymer molecule is called macro-molecule
(t)
All the above
(u)
The theory of formation of concrete is based on the phenomena of formation of voids
(v)
The bulking of sand is taken into account while volumetric proportioning of the aggregates
(w)
The dry sand and the sand completely flooded with water, have practically the same volume
(x)
All the above
(y)
Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
(z)
The edges of a finished wrought iron are rough due to red shortage
({)
Pig iron (charcoal) is manufactured from magnetic ore (Fe 3 O 4 )
(|)
All the above
(})
Bull's trench kiln a trench excavated in ground
(~)
Hoffman's kiln is constructed over ground
()
Tunnel Kiln is constructed as a tunnel
(�)
All the above
(�)
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
(�)
Corrugated sheet iron is made by passing plain sheets between grooved rollers
(�)
Strength and stiffness of corrugated sheets are considerably increased
(�)
Corrugated sheets are generally used on slanting roofs
(�)
All the above
(�)
For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
(�)
For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
(�)
For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55
(�)
All the above
(�)
Hornblende mineral is brittle
(�)
Muscovite is also known as white mica and potash mica
(�)
Biotite is also known as black-mica
(�)
All the above
(�)
Roasting is not necessary if iron ore is an oxide
(�)
Impurities float on the molten iron as slag
(�)
The slag contains lime about 45%
(�)
All the above
(�)
Rusting is caused due to combined action of air, moisture and carbon dioxide
(�)
During rusting, first ferrous bicarbonates are formed
(�)
On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
(�)
All the above
(�)
Slaked lime contains calcium hydroxide
(�)
Quick lime contains calcium oxide
(�)
Slaked lime may be obtained from quick lime
(�)
All the above
(�)
Soft stones are required for carving
(�)
Light stones are required for arches
(�)
Hard stones are required to stand high pressure
(�)
All the above
(�)
Solder material is an alloy which melts at a temperature above 400°C
(�)
Brazing is done at temperature above 600°C to 1100°C
(�)
Brazing joint is stronger than the solder joint
(�)
All the above
(�)
Steel produced by open hearth process is milder than that obtained by the Bessemer process
(�)
Engineers prefer open hearth steel for structural purpose as it is more homogenous
(�)
Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel
(�)
All the above
(�)
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
(�)
The average crushing strength of hand moulded bricks is 6000 t/m 2
(�)
The average tensile strength of hand moulded brick is 200 t/m 2
(�)
The average shearing strength of hand moulded brick is 600 t/m 2
(�)
All the above
(�)
The distinct plane of division along which a stone can easily be split, is called natural bed of stone
(�)
The natural bed of sedimentary rocks is along the planes of stratification
(�)
The natural bed of igneous rocks is not defined
(�)
All the above
(�)
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 oxidized by the oxygen of the ore
(�)
All the above
(�)
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
(�)
Lime is available in Free State
(�)
Lime is available by dissolving calcium carbonate in water
(�)
Lime is available by calcining calcium carbonate at 900°C
(�)
Lime is nothing but calcium chloride
(�)
Melamine is obtained from calcium carbide
(�)
Formaldehyde is prepared synthetically from methane
(�)
The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
(�)
All the above
(�)
Plastics have generally low melting point
(�)
The coefficient of thermal expansion of plastics is about three times than that of steel
(�)
The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
(�)
All the above
(�)
Quick lime is obtained by burning pure lime stone
(�)
Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
(�)
Poor lime is obtained by burning lime stone containing impurities more than 5%
(�)
All the above