Blister steel
1.is obtained by cementation process
2.is full of fissures and cavities
3.can not be forged
4.all the above.
Mastic asphalt is
1.water proof
2.fire proof
3.elastic
4.all the above.
Snowcrete is one of the patent forms of
1.distempers
2.water proof cement paints
3.enamel paints
4.enamel paints
The specific gravity of marble, is
1.2.5
2.2.6
3.2.66
4.2.72
The steel used for rails under heavy traffic and on sharp curves, is
1.Nickel steel
2.Chrome steel
3.Magnese steel
4.Vanadium steel.
Permanent magnets are made of high carbon steel and
1.15% of cobalt
2.15% of cobalt
3.35% of cobalt
4.35% of cobalt
Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:
1.Alumina
2.Lime
3.Ironoxide
4.Magnesia.
Pick up the correct characteristic of Pyroxene from the following:
1.It forms octagonal crystals
2. It converts to chlorine by hydration
3. Its density is 2.3 to 3.6 g/cm2
4.All the above.
Pick up the correct statement from the following:
1.Horn blende mineral is brittle
2.Muscovite is also known as white mica and potashmica
3. Biotite is also known as blackmica
4.All the above.
Pick up the rock which is not a sedimentary rock from the following:
1. gravel
2. sand stone
3.gypsum
4.dolerite
Pick up the synthetic resin from the following:
1.Malamine resin
2.Phenolic resin
3.Resorcinol resin
4.All of these.
Plastics are compounds of carbon with element
1.hydrogen
2.nitrogen
3.oxygen
4.All of these
Seasoning of timber is done
1.to make it water proof
2.to paint its surface
3.to increase its temperature
4.to remove water.
Water paint is a
1. white wash
2.colour wash
3.whiting
4. all the above.
A ferrous metal is
1.cast iron
2. wrought iron
3.steel
4. all the above.
A well seasoned timber may contain moisture up to
1. 4 to 6%
2. 6 to 8%
3.8 to 10%
4.10 to 12%.
Cast iron is used for
1.structural works in beams
2.small sized water pipes
3.columns and struts
4.none to these.
Commonly used thinner in
1.lacquer paints, is alcohol
2. cellulose paints is ethyle acetate
3.oil paints, is naptha
4.all the above.
Distemper is
1.a paint consisting of powdered chalk, pigments, and water
2.a water proofing agent
3.a paint consisting of coloured cement and water
4.a drying agent.
For a good building stone, its specific gravity should the greater than
1.1.5
2.1.7
3.2.2
4.2.7
For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is
1.3.34244213
2.2.930671296
3.2.524363426
4.none of these.
For sanitary pipes and chemical stonewares,
1.salt glazing is used
2. lead glazing is used
3.opaque glazing is used
4.None of these.
Good quality sand is never obtained from
1.river
2.nala
3.sea
4.gravel powder.
In arches, stratified stones are placed so that their planes are
1.parallel
2.perpendicular
3.radial
4.none of these.
Non acid-resistant asbestos is :
1.tremolite asbestos
2.chrysolite abestos
3. amosite absestos
4.none of these.
Oil varnish generally consists of
1.synthetic resin and spirit
2.oil, wax and resin
3. resin, oil and turpentine
4.spirit, oil and wax.
Pick up the correct statement from the following:
1.The average crushing strength of hand moulded bricks is 6000 t/m2
2.The average tensile strength of hand moulded brick is 200 t/m2
3.The average shearing strength of hand moulded brick is 600 t/m2
4.All the above.
Pick up the correct statement from the following:
1.Acid test is done to find out the weathering quality of stones
2.Attrition test is done to find out the rate of wear of stones which are used in road construction
3.Crushing test is done to find out the compressive strength of the stone
4.All the above.
Pick up the correct statement from the following:
1.The plastic bottles are made by the process of blowing
2.The plastic sheets are made by the calendering process in which the plastic material is allowed to pass between cylindrical rollers
3.The application of thermo-setting resins on sheets of paper, is called laminating process
4.All the above.
Pick up the correct statement from the following:
1.Lime is available in free state
2.Lime is available by dissolving calcium carbonate in water
3.Lime is available by calcining calcium carbonate at 900°C
4. Lime is nothing but calcium chloride
Refractory bricks resist
1. high temperature
2. chemical action
3.dampness
4.all the above.
Sea sand used in structures causes
1.dampness
2.efflorescence
3.disintegration
4.All of these.
Slacking of lime is affected by
1.keeping it exposed to air
2. immersing the lime in water
3. crushing the lime lumps
4.none of these.
Stainless steel resists corrosion due to
1.carbon
2.sulphur
3.vanadium
4.chromium
Stones used for the construction of retaining walls must be
1.soft
2.hard
3.light
4.heavy
The base material for distemper, is
1.chalk
2.lime
3.lime putty
4. cement wash.
The compound of Portland cement which reacts immediately with water and also sets first is
1.Tri-calcium silicate
2.Di-calcium silicate
3.Tri-calcium aluminate
4.Tetra calcium alumino ferrite.
The cracks which extend from bark towards the sap wood in the cross section of a tree, are called
1.radial shakes
2. star shakes
3.heart shakes
4.cup shakes.
The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner, are known as
1.knots
2.rindgalls
3.burls
4.none of these.
The fire clay contains pure
1.lime
2.oxide of iron
3.hydrated aluminium silicate
4.magnesium.
The most important constituent of varnish, is
1.drier
2.solvent
3.resin
4. all the above.
The pigment used in paints for corrosive resistance, is
1.red lead
2.white lead
3. ferrous oxide
4. zinc white
The rocks having alumina or clay as their major constituents, are known as
1.siliceous rocks
2.. argillaceous rocks
3.calcareous rocks
4.sedimentary rocks
The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called
1.Plutonic rocks
2.Hypabyssal rocks
3. Volcanic rocks
4.Ignoeous rocks.
The steel used in R.C.C. work is
1.stainless steel
2.mild steel
3.high carbon steel
4. wrought iron.
The stones obtained by blasting are used as
1. ballast in railways
2.aggregates for concrete
3.roadmetal
4. All the above.
The thermosetting plastic
1.becomes rigid when moulded at suitable pressure and temperature
2.at 127°C to 177°C permanently set and further application of heat does not soften it
3.charrs at 343°C
4.All the above.
The usual percentages of clay and metal in cermet are :
1. 50%, 50%
2. 60%, 40%
3. 70%, 30%
4.80%, 20%.
The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick
1.20%
2.15%
3.10%
4. None of these.
When a brick is immersed in water for 24 hours and then dried, if
1.no grey or white deposits appear on the surface, the brick is free from soluble salts
2.no grey or white deposits appear on the surface, the brick is free from soluble salts
3.0 per cent surface is covered with grey or white deposits, the brick has serious efflorescence
4.All the above.